Philadelphia, PA · Engine & transmission repair
Don't replace it.Repair it.
Quoted a new engine or transmission? Before you pay for a replacement, let us find what actually failed. JCS Mechanics repairs what other shops replace, at the best price in the market.
Got a quote? Bring it. We'll beat it.Show us the price another shop gave you. We look at the real problem and improve it.
2929 B Street, Unit 4, Philadelphia, PA 19134
Get directions (opens Google Maps in a new tab)What we do best
The heavy jobs, handled properly
See what we see
Inside your engine
Scroll and the engine comes apart. Six layers, each with a job, and each one tells a different story when it wears out. This is what we go through on an engine job.
- 1
Valve cover
Keeps oil in and dirt out of the valve train. A leak here is common, and it is a reason to look deeper.
- 2
Cylinder head & valves
The valves let the engine breathe. Overheating can warp or crack the head, and then it needs machine work or a replacement.
About this repair → - 3
Head gasket
Seals combustion, oil and coolant between the head and the block. White smoke, milky oil and overheating are how it fails.
About this repair → - 4
Pistons & rods
Compression and power start here. Worn rings mean smoke and oil use; a broken rod ends the engine.
About this repair → - 5
Engine block
The foundation that holds the cylinders. Cracks, scoring or a warped deck decide whether an engine can be rebuilt.
About this repair → - 6
Oil pan & crankshaft
The sump and the shaft that turns piston motion into rotation. Bearing wear shows as a deep knock and falling oil pressure.
About this repair →
Engine swap
Out with the old, in with the new
When an engine cannot be saved, we pull it, check everything that goes with it and fit the replacement. Scroll and the hoist carries the new engine over the bay and lowers it onto its mounts.
- 1Hoist the engine
- 2Lower it into the bay
- 3Bolt up and test
See what we see
Inside your transmission
A gearbox is a stack of precise parts working together. Scroll and it comes apart, from the flywheel to the tail housing, so you can see where the noise, the slip or the grinding comes from.
- 1
Flywheel & clutch
The link between the engine and the gearbox. A slipping, grabbing or shuddering clutch means this stack is worn.
About this repair → - 2
Bell housing
Holds the gearbox to the engine and lines everything up. A cracked or misaligned housing causes noise and early wear.
- 3
Input shaft & gears
Carries the engine's power in and passes it to the gears. Whining and grinding in gear start here.
About this repair → - 4
Countershaft & gear cluster
The gear sets that give you each ratio. Chipped teeth and worn bearings show as noise and as gears that jump out.
About this repair → - 5
Synchronizers
Match the speed of the gears so they engage smoothly. Grinding when you shift means worn synchro rings.
About this repair → - 6
Tail housing & output shaft
Sends the power on to the driveshaft or the axles. Leaking seals here drip gear oil under the car.
About this repair →
Transmission swap
Fitting a gearbox, step by step
A transmission comes out and goes back in from underneath. We roll a jack in, raise the gearbox, slide it onto the engine and bolt it home. Scroll to watch it happen.
- 1Roll the jack under
- 2Raise and slide in
- 3Bolt up and fill
And the everyday jobs
Inside your brakes
Scroll and the assembly comes apart. Every part has a job, and every worn part gives a sign before it fails. This is what we inspect on a brake job.
- 1
Hub & wheel bolts
Carries the wheel and the rotor. Worn bearings and loose bolts show up as vibration and noise.
- 2
Brake rotor
The steel disc the pads squeeze. Warped, scored or thin rotors cause pulsing and long stops.
- 3
Brake pads
Friction material that wears away by design. A squeal or a grind means it is time to look.
- 4
Caliper
Clamps the pads onto the rotor with hydraulic pistons. A sticking caliper wears pads unevenly and pulls the car.
Hear it? See it? Smell it?
That is our cue
A knock, white smoke or a temperature needle in the red is your car asking for help. Tap the one you are noticing and read what it usually means, then bring it in before it gets worse.
Straight answers
Repair, rebuild or replace?
Every big job comes down to one of three paths. We tell you which one fits your vehicle, and why, before any work starts.
- 01
Repair
Fix the part that failed. The right answer when the damage is limited: a gasket, a seal, a sensor, a worn component.
- 02
Rebuild
Open the engine or gearbox, measure everything and replace what is worn. Keeps your original unit and brings it back to specification.
- 03
Replace
Fit another engine or gearbox. The way to go when the damage is too deep, or a repair would cost more than it is worth.
Repair or replace?
Quick check before you pay for a replacement
Tell us what you notice and get a straight first read. It is guidance, not a diagnosis or a quote, but it shows when a repair is likely and when you should ask for a second opinion.
Tick what you notice and your first read appears here.
Everyday repairs too
Brakes, oil, suspension and more
- Brake Repair
- Steering & Suspension Repair
- Exhaust Repair & Replacement
- Emissions Testing
- Battery & Electrical Repair
- A/C & Heating Repair
- Power Window Repair
- Body & Trim Repair
- Painting
- Rear & Side Window Replacement
- Water Leak Repair
- Oil Change & Maintenance
- Air & Cabin Filter Replacement
- Wiper Blade Installation
- Tires & Alignment
- General Repairs & Maintenance
How it works
From noise to fixed
- 01
Tell us
Book online or stop by. Describe the noise, the smoke or the feeling, and the vehicle.
- 02
We open it up
We inspect and test, and when it needs it we go inside. We find the cause, not just the symptom.
- 03
You decide
We explain what we found and the options: repair, rebuild or replace. Nothing starts without your yes.
- 04
Back on the road
We do the work, test it and hand you the keys with a clear explanation.
Questions
Straight answers before you call
Can you repair my engine instead of replacing it?
Often, yes. Many engine problems come from one worn or failed part, such as a gasket, a sensor or a timing component. A diagnosis finds the real cause. If the damage is too deep, we tell you and explain the options, so you only replace the engine when it truly cannot be saved.
Another shop quoted me a replacement. What should I do?
Bring the quote, or send it to us on WhatsApp. We look at what actually failed and give you our price. Our promise: got a quote? Bring it. We'll beat it.
What is the difference between repair, rebuild and replace?
A repair fixes the part that failed. A rebuild opens the engine or gearbox, measures everything and replaces what is worn, keeping your original unit. A replacement fits another engine or gearbox. We tell you which one fits your vehicle before any work starts.
How much will it cost?
It depends on the vehicle and on what actually failed, so an honest number comes after a diagnosis. Send us the make, model, year and what is happening on WhatsApp and we will tell you how we would approach it.
How do I book a visit?
Use the form on this page, message us on WhatsApp or call. We get back to you to confirm the day. Nothing starts without your yes.
Where are you and when are you open?
We are at 2929 B Street, Unit 4, Philadelphia, PA 19134. Hours: Mon–Sat 9 AM–7 PM · Sun closed.
Do you work on my make and model?
Tell us the make, model and year when you book and we will confirm that we can take it on before you bring it in.
Got a quote? Bring it. We'll beat it.
Another shop quoted a replacement? Show us the number. We look at what actually failed and give you our price.
Book a visit
Let's look at your car
Tell us what is going on and when suits you. We will get back to you to confirm the day and answer your questions.
Prefer to chat?
Message us on WhatsApp, (267) 237-3071. Send photos, the quote you were given or a short description, and a mechanic answers you directly.
Find the shop
JCS Mechanics
2929 B Street, Unit 4, Philadelphia, PA 19134
Hours: Mon–Sat 9 AM–7 PM · Sun closed