Recovering from bore wash. Experiences, solutions, advice needed..

[turquise1]

Originally Posted by nick325xit 5spd

Oh dear. I suspect that the path to compression is another engine.

But why? This engine had good (180 psi for each cylinder for 200k+ miles engine) right before the borewash. Completely worn out piston rings because of multiple starting attempts? It's ok to imagine the worst case but I do not see that happening yet..


Thanks,


Ozzie

[nick325xit 5spd]

Originally Posted by turquise1

But why? This engine had good (180 psi for each cylinder for 200k+ miles engine) right before the borewash. Completely worn out piston rings because of multiple starting attempts? It's ok to imagine the worst case but I do not see that happening yet..


Thanks,


Ozzie

Because when you’re down to 30psi compression and it’s around the rings, and especially when you’ve described everything you did, it’s hard to imagine that you have not trashed the rings and gouged the bores at this point.

There’s not a lot to do with an engine that has no compression before you tear it down.

Have you scoped the bores? You can buy a cheap endoscope for like $10 and you can drop it down a spark plug hole and look.

[turquise1]

I have not done anything other than trying to start the engine though and that is how too many people recover their cars from bore wash. Everytime I tried to start the engine, there was a bit oil in there and I measured the compression quickly and there was 30 psi compression in there then too.

Is there another way to start a car after a borewash? When I do a quick web search I come across many examples of 'no compression' (different car brands and also E46s for a different reason) after bore wash and most of them seemed to have recovered from it by consistent cranking with oil in sp holes.

I have 2 different borescopes. What would a gouged chamber look like?

Thanks,

Ozzie

[X5chemist]

The cylinder wall will be toast.

[Fifty150hs]

Originally Posted by X5chemist

The cylinder wall will be toast.

Ouch!

[nick325xit 5spd]

Originally Posted by turquise1

I have not done anything other than trying to start the engine though and that is how too many people recover their cars from bore wash. Everytime I tried to start the engine, there was a bit oil in there and I measured the compression quickly and there was 30 psi compression in there then too.

Is there another way to start a car after a borewash? When I do a quick web search I come across many examples of 'no compression' (different car brands and also E46s for a different reason) after bore wash and most of them seemed to have recovered from it by consistent cranking with oil in sp holes.

I have 2 different borescopes. What would a gouged chamber look like?

Thanks,

Ozzie

You'll see vertical scratches on the cylinder walls. If they are there, the block is basically done. (I mean, you could rebuild it, but who rebuilds a 4.4?)