So... I have this spare engine.

[elgyqc]

After spending 2 1/2 years in my green 2000 5-speed I removed this engine over the winter and installed the car's original engine that has had necessary maintenance done to it.
Today I started to disassemble this "spare" engine to change the cam tensioner pads and a few other things. It was running fine, although it seemed a bit down on power.
With the bank 2 valve cover off the cams look good and the bearing journals are like new.
I'll update this thread as I move along and will post a few pictures of what I find.

[elgyqc]

There is some scoring on the camshaft bearings that are beside the chain on bank 2 . All other bearings are perfect. I a have started another thread on that subject, with photos.
https://986forum.com/forums/performance-technical-chat/85802-scoring-camshaft-bearings.html#post660736

The chain tensioner pads are worn, but I have seen worse.

[redpepperracing]

Originally Posted by elgyqc

There is some scoring on the camshaft bearings that are beside the chain on bank 2 . All other bearings are perfect. I a have started another thread on that subject, with photos.
https://986forum.com/forums/performance-technical-chat/85802-scoring-camshaft-bearings.html#post660736

The chain tensioner pads are worn, but I have seen worse.

One of my pads was worse than those, yours are more evenly worn than mine were. I saw your other thread, not sure if that will be an issue or not, I don't think mine had any noticeable scoring. I did have some large scoring on the oil pump cavity, I'm leaving it for now, but at least it's replaceable if I need to.

I would recommend dropping the oil pan if you haven't already, there could be surprises in there. Ask me how I know!

[Lucas2024]

Congrats on the success!







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[samlevy0515]

Originally Posted by elgyqc

This morning I finally got to shake-down the engine. I had to wait over 2 weeks for wheel bearings before I could finally set the car down on its wheels.
The engine seems to run well, a bit of smoking on the initial starts but that seems to be gone. The temperature stayed in the normal range, the recycled clutch is fine and it starts and idles well. I am running it with the front and top engine covers off (so I can check the power steering reservoir and easily check the engine), the top up (don't want to fold it down directly over the engine) and the heater on full blast (to help get the coolant circulating) so it is rather hot and noisy.
I put the Durametric on it and the cam deviations are quite respectable, -5.63 and -5.53, better than the original engine.
So far it looks like my gamble on buying this engine is paying off.

Congrats on the successful shake-down! Those cam deviation numbers (-5.63/-5.53) are seriously impressive—better than the original engine is a win.






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pancake stepper motors

[samlevy0515]

Originally Posted by elgyqc

Yesterday I got to the point where I could try a test start. I cranked it for awhile to build up the oil pressure (didn't have to do anything special since the fuel lines were empty and it would take awhile for the fuel to get to the engine). I tried some starter fluid and it started and ran briefly. I figured that it should have run enough to be getting fuel but it would not start without the starter fluid. I did a search on the forum (key word "starter fluid") which got me to a thread where it was suggested that the CPS (or as Porsche calls it the Crankshaft Reference Mark Sensor) might be the problem. I replaced the CPS with the one from my original engine and it started right up!

The problematic CPS has this chaffing which seems to have broken a wire:



Here is the second start up, since I didn't record the first one.

https://youtu.be/4oqefHMHm5c

It's a lot louder in real life... my neighbour was wondering what I was up to. I turned the engine off, it didn't stall. It seems that the car has to be driven to allow the engine control system to set itself up properly, so till then some rough running is to be expected

Great troubleshooting! the chafed wire likely caused an intermittent signal, preventing fuel delivery.