I have this block with 190k miles but when the head was removed this is what I found just one cyl was scored but it's something minimal I can't barely feel it with my nail , nothing nada. It looks better than my current engine .

 

i agree

 

*EDIT now come on Lart, you can't just change a thread into something important like that...

 

??

 

Looks good. Will still be tappered.

 

looks pretty good to me, that might be a good one to do rod bearings on and resell or another way is to just do a finishing pass on it with the paste and oil on the felts and then new rings if you wanted to keep it. What's the history on the car?

 

Came from a 87, that I bought from Porboys up north, it was a lean sale. The PO did a lot of work to the car, new shocks, rebuild the turbo, dta engine mgmt a other bunch of stuff, I am thinking there is no way this engine has 190k, it's very clean outside too. out of all the 944/951 engines that I ever seen this one is the best.

 

Not sure I follow you here? Are you describing some sort of poor mans alusil honing? (which would be very interesting..)

 

Yeah, it's not the 100% correct way to do it because more than likely the cylinders will have a slight tappered profile to them anyway.

An engine we did for a guy, the cylinders were actually pretty straight, #3 was off a bit. He wanted new rings installed. I tried to talk him into boring to oversize and new pistons/rings for the long haul but the $$ were low after all the upgrades. Sent the block to Duffin, basically they set the tool just to finish the bores again. Mr Duffin said it was ok but he wasn't fond of doing it but it should expose just barely enough of the alusil to help seat the rings. The ring gap was still under max spec, like .06?? IIRC, and after break in, the compression was 141-144 per bore, not the best but not bad, previously he was down to 113-128. How much of that was the refreshed head compared to the bores, not sure. the car is a weekend toy, no track time.