Silber’s 2002 Boxster S Engine Build

[Silber]

Originally Posted by blue62

From what I see in your picture in post #15 and what your describing here. (valves broken off). There was a mechanical issue. Broken wrist pin, broken rod, valve spring or lifter issue. will be interesting to see what you find with further disassembly.

I think you are onto the mark with the valve spring. One thing I did not mention is the car ran, but poorly, after it lost all power during a run. I started it maybe five or six times with no power and no expensive engine noise. But the last time I started it, it made all kinds of expensive engine noise.

So, if the valve spring failed partially maybe the valve would not hit the piston but if it later failed completely then it would and that would cause the damage chain to start.

Headed out to the garage in a few minutes will know more tonight hopefully.

Silber

[blue62]

Originally Posted by Silber

I think you are onto the mark with the valve spring. One thing I did not mention is the car ran, but poorly, after it lost all power during a run. I started it maybe five or six times with no power and no expensive engine noise. But the last time I started it, it made all kinds of expensive engine noise.

So, if the valve spring failed partially maybe the valve would not hit the piston but if it later failed completely then it would and that would cause the damage chain to start.

Headed out to the garage in a few minutes will know more tonight hopefully.

Silber

yup with that info certainly sounds like a mechanical issue rather then heat.

[Gilles]

Originally Posted by Silber

But the last time I started it, it made all kinds of expensive engine noise.

uhh, sorry to hear that.

[Silber]

Originally Posted by Gilles

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uhh, sorry to hear that.

You and me both! When it had low power but would run, I was thinking some sort of easy to fix valve train issue. once I heard all the crunching I knew it was probably not going to be as easy as I had hoped LOL

On the good side the crunching happened basically idling in the garage so the damage is not as bad as it could’ve been if I were going at high RPMs.

I got the valve cover off the 1-3 head tonight:

https://adobe.ly/3kmd1Vc

I found a loose valve keeper, but the cams look to be in very good shape. May have the magnafluxed just to be sure.

My garage is kind of a mess I need to pick it up and build a workbench to keep all the engine parts sorted out on. Will probably come back to this Sunday morning.

Regards,

Silber