top of page
Link to Porsche service, repair & rebuild: home | dark blue porsche speeding on roadway against blurred background
Link to Porsche service, repair & rebuild: service areas | george perdomo working underneath porsche engine
Gallery 243 x 243_edited.jpg
Link to Porsche service, repair & rebuild: Best-Practice | close up of golden colored engine oil pouring from spout
Link to Porsche service, repair & rebuild: credentials of a miami porsche specialist | george perdomo standing red porsche 935 race car
Link to Porsche service, repair & rebuild: contact | finger touching iphone screen to make call |

Hover over main image for captions and forward and back nav arrows.

2017 porsche turbo s in for ppi

2017 Porsche Turbo S. PPI is in progress. Car is being raised to inspect underneath. Any damage, fluid leaks, missing hardware, modifications, and any other anomaly will be noted.

2017 porsche turbo in for PPI

Same 2017 Turbo S. Has proven to be an immaculate car. Very justified given it having only 6,000 miles. At the right price, the new owner will be very pleased with this.

3 porsches parked in gp autowerks garage for repair, service, and a rebuild

In the old shop: Silver 2013 991 - needs sorting out from having run bad fuel. Red 1991 964 - heading for engine reseal. 2003 986 Boxster S in foreground has PPI in progress.

Miami Porche specialist George Perdomo removing Nikasil cylinders from Porsche engine

Nikasil cylinders being removed from 3.3 liter engine. Initially developed for Porsche's 917, these cylinders are internally coated with a very thin layer of nickel silicone carbide. The resulting surface is extremely smooth, much harder than steel, and very durable.

Porsche RSR clone's engine is being tuned by George Perdomo so each cylinder breathes equally

Carbs have been re-jetted in this RSR clone. Cylinder air flow is being finely tuned so all cylinders will breathe equally. This "air flow balancing" together with nicely balanced reciprocating weights minimizes an engine fighting itself during each combustion cycle. Ultimately this translates into smoother, higher performance, and greater engine durability.

Porsche has been lowered and raked 2 degrees for improved handling

Customer's car after being lowered and raked 2 degrees. This refinement improves both cornering and straight-line stability as well as front-end braking. Drive this car and exactly the same Porsche in stock stance geometry and you'll immediately notice the improved handling & control given by this refinement.

miami porsche specialist gp autowerks finds deposits on 1991 porsche carrera intake valve

'91 Carrera #1 intake valve. Deposits seen result from engine NOT being run as hard as it should be. While small deposits are not bad, larger deposits are unwanted---they can come loose and lodge between the valve & seat causing any number of issues.

Porsche engine with 4 broken head studs is being repaired

This engine has 4 broken head studs---2 on this side at #4 and #6 and 2 on the other side. When studs break, fastening of the head to cylinder becomes unbalanced. When run for any extended period of time, the result is a rounding of the head's mating surface. Heads in this case were rounded by 0.001". Left unattended, this measure would have increased in time. These heads were subsequently milled perfectly flat to factory spec.

30 year old Porsche engine has been restored / rebuilt

Rebuild of 3.2 engine nears completion. Before owner takes control, it will be treated to a very specific break-in procedure culminating with an oil & filter change. When done, this engine will perform like new.

Miami Porsche specialist George Perdomo meets for breakfast in the Gables with fellow Porsche owners

Porsche owners breakfast meeting in the Gables. Amidst the Porsche talk with friends, a significant volume of pancakes, eggs and coffee are consumed.

Porsche RSR clone is parked outside GP AutoWerks waiting for engine performance adjustments

RSR clone has just arrived for engine performance adjustments.

Porsche engine's cam timing is being set

To get an engine's full power potential, cams on both sides must be timed precisely. Here, the dial gauge indicates an exact setting on this cam. Zero deviation is the GP standard for cam timing.

ARP Head studs are installed in Porsche engine

ARP studs have been installed. This is an excellent upgrade when replacing stock studs as ARPs will last indefinitely.

Porsche 356 replica on flatbed arrives with ignition and handling issues

356 replica has been brought in with ignition and handling issues. Bad wiring done on "upgraded" ignition components is found. Handling problem is two-fold: 2 out-of-round wheel rims, and bad bushings. Corrections are made to return ignition and handling to premium form.

Porsche pistons and cylinders are laid on table

Cleaned, inspected and measured Turbo pistons & cylinders. With all specs in factory order, only a new set of rings is needed to restore this engine's compression to peak performance.

New Porsche piston ring held in hand

New piston rings are visually inspected prior to weighing each set. Ultimately, swap-allowable components will be moved among piston-rod assemblies to minimize weight deviation among the group. The goal being to optimize reciprocating balance without the need/cost for machining. Final weight deviation is reviewed with the owner who can decide to invest in machining parts if greater precision is desired.

Six Porsche spark plugs are set side by side for comparison

Plugs are revealing of an engine's operating condition. Here, cylinder 6 has extreme issues... bad rings and/or a worn intake valve guide and/or seal. Based on the information given here alone, this engine's performance is significantly lacking. We'll show these to the owner and speak about what corrective options are available.

Night shift at George Perdomo's Porsche service, repair and & rebuild shop in Miami

Working at night is done to keep up with customer demands. Much gets done given minimal if any interruptions. Photo is at 73rd Ave shop. Have moved since.

Porsche engine is ready to receive new rod journal bearings

Case is prepped to receive new rod journal bearings. (With crank journals in excellent condition, there's no need to split this case.) Clean mating surfaces are essential to the durability of a rebuilt engine. Look closely at cylinder seats---super clean.

Miami Porsche specialist George Perdomo meets with fellow Porsche owners at Panther Coffee in Wynwoo

The "Wolf" has instigated an impromptu gathering at Panther Coffee in Wynwood. Catching up over java & croissants is accomplished. Better still, new friendships are made.

Porsche engine with nearly 300,000 miles is removed from car and being prepared by George Perdomo fo

'80 CIS engine with nearly 300,000 miles has just been removed from its companion chassis. This engine and transmission are scheduled for a comprehensive rebuild. A set budget is already given so it's clear what the owner wants & expects before the project begins.

Porsche connecting rods with new journal bearings are laid out in tray

Connecting rods with new journal bearings. Together with their piston assemblies, these have been balanced to within 0.5 grams deviation. To make this worthwhile, crank and flywheel must also be balanced to the same tolerance. The result is a very smooth running engine with exceptional durability.

George Perdomo reaching into Porsche engine area to tune engine

After many years of experience, it's possible to tune an engine by sound & touch alone. Here, a 3.2 is being run through low, mid, and high RPM ranges. Immediately after this photo is taken, fine adjustments are made to improve high-end performance.

Porsche parts laid out on ground for inspection

Replacement parts are inspected immediately upon arrival. Anything wrong is corrected quickly. This prevents progress delays due to part supplier errors. Ultimately this means GP Porsche owners consistently see their cars sooner than later.

Porsche turbo exhaust-side drive blades

Turbo's exhaust-side drive blades are visually inspected to determine immediately if, due to any damage, there's reason for replacement. These blades look good. Shaft play was checked just after this image was taken and that too reports in order. Missing stud will be replaced upon reassembly.

Porsche brake pads falling apart

Brake pad fell apart upon removal from car. Should these brakes have been needed for an emergency stop, the corner (right front) where the loose pad material was would not have worked correctly... braking imbalance would have rotated the car counter clockwise. These are economical Mintex pads---not a recommend pad for any Porsche driven enthusiastically.

Porsche's magnetic drain nut has collected worn metal

Transmission's magnetic drain nut is doing its job collecting worn gear metal. Given when this oil was last serviced, this transmission is experiencing normal wear.

George Perdomo's signature Porsche height & rake setting on classic 930

GP height & rake settings on a classic 930. Lowering obviously brings the car's center of gravity down. A 2-degree nose down rake improves front brake performance as the nose is already "advanced" downwards when the chassis begins a braking cycle.

Porsche engine's stained interior walls

Stained interior walls of this chain housing case tell of oil not being changed frequently enough---bad news for ALL lubricated parts in this engine. Compare these walls to those in the next chain housing...

'79 Porsche engine's interior walls indicating a well-cared for engine

'79 chain housing...6 years older than housing just seen. By comparison, these walls indicate a well cared for engine---an engine that's experienced frequent oil & filter changes. Based on lubrication care alone, there's a very high probability of all the internals of this engine being in better condition than those in the stained wall engine. (Hydrolic tensioner upgrade is seen here. An excellent decision.)

Complete Porsche 3-condenser AC system hose coiled on the ground

Guess how much hose there is in a 3-condenser Porsche AC system? Answer is at end of next photo's caption.

Porsche AC compressor in black death mode

AC compressor in "black death" mode. "Black" being due to the amount of metal worn from piston failure and mixed with the system's oil. "Death" being due to incorrect---lacking---oil charge. Is not worth repairing this compressor---new unit is called for. Entire AC system must be flushed of this "oily soot" to work correctly. Then recharged with correct oil and refrigerant amounts. (Answer to question: 40+ Feet.)

George Perdomo preforming a compression test on Porsche engine

Compression test in progress. Combined with a leak down, the two data sets provide a clear picture of each cylinder's sealing integrity within an engine. Only a leak down procedure reveals exactly where issues are within a given cylinder.

'74 Porsche Carrera parked on Rocky Mountain Road

Customer's '74 Carrera in the Rockies. With not quite 3" of ground clearance, this car corners as if on rails. The trade-off is there's very little suspension travel. This creates a very stiff ride. Given this ride height, a constant focus on the road ahead is absolutely necessary.

Porsche 930 heads just removed from car sit next to each other on ground

Just removed heads. From this engine's leak down test, valve seating is good but the rings and/or cylinders are worn. Further testing will be preformed to confirm this status. Valve clearances will be inspected. If necessary, these heads may be reconditioned depending on their status and the owner's decision after discussion.

Before & after of Porsche engine heads showing dirty and clean heads

Before cleaning, components are always inspected to see what evidence of anomalies may be shown by the grit & grim an engine wears. If parts are cleaned before such inspections, valuable "evidence" can be lost.

'80 Porsche Targa roof top being rebuilt

'80 Targa top with skin & burlap removed. This is headed for a complete restoration. Worn webbing will be replaced, joints lubricated, plates repositioned to spec, new skin & cushioning, and ultimately the roof will be tuned to the car to minimize wind noise and eliminate water leaks.

George Perdomo inspecting Porsche engine rod bearings for play

Rod bearings being checked for play at the crank shaft. Also confirmed at this stage is the measure of front-to-rear play of rods on the crank is. Unwanted is any swing movement of the rods at their piston-ends and this swing being parallel to the crankshaft. If there is swing, a worn rod bearing is evident.

Porsche engine's oddly positioned intake gasket

Dismantling engines often uncovers mysteries---in this case an oddly positioned intake gasket. While this gasket has shifted slightly before this photo was taken, its original position can be detected given the gasket's intact grime line.

Anti seize being properly applied to Porsche engine's alternator shaft by George Perdomo

Where proper to apply, anti seize serves its name sake allowing parts to separate easily be it tomorrow or 10 years from now. This makes for smart mechanical servicing no matter who returns next to parts treated in this manner. Anti seize applied in the wrong locations can prove problematic. One has to know where this media goes to use it intelligently.

Porsche engine's exhaust manifold leak is revealed

Whomever installed this engine's exhaust system last failed to correctly secure this exhaust manifold. The result is a flange leak evidenced by the soot marker on the cylinder. While an engine is installed and running, the sound this produces can be taken for a broken stud unless one knows the resonance difference between the two.

customer of miami porsche specialist gp autowerks in his 1980 porsche targa

Customer in an '80 SC Targa. This car had body work done to the hood and driver's door. While at the body shop, that shop left the car's frunk and cabin open to the shop's dust flow. They also did not properly align either the hood or door. Afterwards at GP Autowerks, hood and door were corrected and the car lowered. Detailing the car was charged back to the body shop. They respectfully admitted the error.

George Perdomo applying liquid gasket to Porsche engine chain housing cover

Chain house cover getting a liquid gasket application. When applied correctly, this type of "gasket" allows parts to expand & contract without the seal loosing integrity. This is superior to any stock, fibered gasket.

Porsche fuel tank seam is rusting

Fuel tank seam. These seams rust predictably. Got to catch this corrosion early or an otherwise excellent tank will be ruined by its seam's deterioration alone. This tank is being attended early. Will clean and treat the seam all around, returning to the owner a fuel tank more durable than a new OEM.

Excessive oil leaking from below Porsche engine

Minor oil leaks in Porsche engines are typical. This is excessive and unacceptable and should (was) attended immediately. Bottom line, oil and a hot exhaust are a bad combination. This is a potential fire hazard. Would be worse if the oil return tubes were leaking. Here, they are not. Good idea to look under your engine once in a while---or have it inspected.

Porsche crankshaft is removed from engine to take several measurements

Crankshaft just removed from its case. From inspections made prior to splitting the case, it is already a given that the bearings need to be replaced. When the rods are off the crank, everything will be checked according to factory specs for this engine. If the journal bearings are bad, the wrist pin bushings are likely to be as well. What ever needs attention, it is always the owner's call as to what is accomplished based on the input given to him or her.

Porsche 911 running on 5 cylinders has chafed-through fuel injection wire

"5 Cylinder" 250k mile 911 is in to find out why and where the loss of power is. Fuel starvation is found at one cylinder. Then the root cause: an injector wire has chafed through on the air filter box rendering its cylinder useless. This wire is repaired, then rerouted to prevent a repeat performance.

Porsche doughnut clutch disk compared to spring clutch disk

Old style rubber dampened clutch disks are risky. They're prone to failure and when they do fail, rubber chunks fly throughout the clutch area usually causing some measure of collateral damage. When replacing a worn rubber disk, a spring dampened disk is advised unless there's an owner call for originality---as there sometimes is.

Porsche magnesium fan housing is cracking

While exceedingly light in weight, magnesium fan housings tend to fracture over time due to operating stress.

Another Porsche magnesium fan housing cracking

Another view of the same fan housing. Once fractured and so weakened, tension from the alternator belt can pull a housing out of round...

Porsche fan housing showing area where fan blades have contacted housing

Once pulled out of round enough, fan and housing meet. Contact usually occurs around 1 and/or 7 o'clock inside the house (due to the directional pull of the belt.) Contact between these parts makes a distinct bell ringing sound that's audible from inside the car when the engine is at idle...

Porsche cooling fan that has made contact with housing shows result of friction

Once a fan and housing make contact, friction will overheat the fan blades. The blade(s) making the most contact will be the first to deform from the heat. Once the "bell sounds," it is best to minimize running the engine and have the housing attended. The fan may be saved when doing so early.

Bite in original Porsche chain housing o-ring

Bite in this chain house o-ring tells of an inexperienced installation. Fact is, someone qualified would sense this seal being bitten when it occurred... and should have removed and replaced it immediately.

Porsche Logo
Porsche Club of America Logo

GP AutoWerks:


7011 S.W. 46th Street

Miami, FL 33155


Independently Serving

The Greater Miami

Porsche Community

Since 1979

Miami Porsche Service, Repair & Rebuild Shop

GP AutoWerks

Miami's Master Porsche Mechanic

For Classic & Contemporary Porsche Sports Cars.


Disclaimer: Porsche, the Porsche crest, and Porsche car model numbers & names are under licensed use by Porsche Cars North America, Inc. (PCNA) from the owner Dr. Ing. h.c. F. Porsche Aktiengesellschaft, Porsche AG ("Porsche.") The PCA logo is the property of the "Porsche Club of America." The "Porsche Museum" name is the property of Porsche. No association or affiliation with Porsche, PCNA, The Porsche Museum, or PCA is intended or implied by GP AutoWerks, an independent Miami-based Porsche service, repair, rebuild & PPI shop that offers comprehensive Master Porsche mechanical care for classic & contemporary Porsche sports cars---356 through 991, 928, 944, Boxster, and Cayman. Editorial content is provided in this website including both text & photos. Editorial photos are presented with a box rule around them. Any use of the word "safe" or "safety" in this website holds a car's owner and/or driver ultimately responsible for all matters concerning the standing, driven, or otherwise in use vehicle. Credits: Videos are Porsche productions presented for educational & entertainment purposes only. Permission for presentation is on file. Outlined photos are editorial content. Photos of Miami Porsche service, repair, rebuilding and PPI depict the property of GP AutoWerks' customers. All such photos are used with the expressed permission of GP AutoWerks' customers whose permission is into perpetuity. Photography, unless credited otherwise, is © 2015-2020 Karl Hansen. All rights reserved. Photo captions are provided to reflect photo content and credits appear where due.

Website structure © 2015-2022 GP AutoWerks. All website content but for credited photos is © 2015-2022 Karl Hansen. All rights reserved.

Mobile Device Content:


Miami Porsche Service, Repair, Rebuild  |  GP AutoWerks

Page: Photo Gallery


Photo Gallery

Desktop viewing offers captions with each photo.


mobile device logo: porsche crest
mobile device logo: porsche club of america

Porsche, the Porsche crest and Porsche model names are the property of Dr. Ing. h.c. F. Porsche Aktiengesellschaft, Porsche AG ("Porsche") and is under licensed use by Porsche Cars North America, PCNA. The PCA logo is the property of the Porsche Club of America. No affiliation with either Porsche or the Porsche Club of America is intended or implied by GP AutoWerks, an independent Porsche service, repair, rebuild & PPI shop located in Miami, FL., U.S.A. Any use of the word "safe" or "safety" in this mobile site holds a car's owner and/or driver ultimately responsible for all matters concerning the operational safety of the car being driven or otherwise used. Please see desktop website for full disclaimer and credits.


Website structure © 2015-2022 GP AutoWerks. Website content unless credited otherwise is © 2015-2022 Karl Hansen. All rights reserved.

bottom of page