This 997 Porsche 911 C2S came to us as it had a number of different noises coming from the engine bay, plus there was smoke coming from the exhaust.
We could see straight away the engine was burning oil, the smoke from the exhaust was the giveaway.
We know there is a common issue with nickel cylinder liners on the 3.8 litre engine as we have rebuilt so many of these engines now. But we perform a full diagnostic to be sure of the root-cause.
We used a bore scope to inspect the cylinder liners and pistons. We found 2 cyclinders on bank 2 which had pick-up, this is where the piston starts to wear away at the cylinder wall and this in turn causes oil to get into the combustion chamber (above the piston).
We stripped down the engine to confirm the fault.
The remedy for this fault is to rebuild the engine with steel liners taking the place of the original cylinder walls.
Please see the pictures below showing some of what we did.
This Nissan GTR came in for a modified bell housing and sport cat downpipes.
The bell housing on the GTR is not one of it’s best features and even OE replacements and revisions still have an issue with noise and vibration. The replacement unit we fitted here solves the issue with a relatively simple solution. New rear bearing is fixed position roller bearing design instead of the ball race bearing. The retention of the front bearing is also improved for increased strength.
The sport cat downpipes allow for a faster turbine spool up due to less back pressure, therefor increased power output is possible with less engine strain.
We did have an issue with removing the turbo’s, due to the vehicle’s age and many heat cycles, all but ONE exhaust stuf snapped on the way out. So we had to split the turbos to be able to get them onto our pillar drill safely, drill out the old studs to replace them with stronger studs with thread inserts.
You can see from the pictures we had fun working on this GTR.
Our client Gary brought his R34 GTR in for healthcheck after a few track days. We checked the fluid levels, the suspension, engine and under the car to make sure everything is still tip-top.
The engine was recently re-built by us for a higher state of tune and is still going strong as expected!