Thread: 90% convinced i have a collapsed piston skirt

Tweet

Originally Posted by 34_40

Not certain of piston skirt failure being the noise although I have seen it only once in a straight 6 Ford. It would only make a brief knocking noise upon accelleration from a stop light...

If your interested. I am going to need to replace the pistons in my stroker block. The ones in there now are .030" over coated speed pro's I think. Not sure if you can use them but, If interested I'll get the numbers. If you can use'em, I'll cut you a sweet deal on'em..

Mike - Thanks. I hope to not even have to pull the engine and especially do a rebore. If I do, I can probably find you

As far as that clunk - yep, pulling away from a light or putting it in gear from a standstill and dropping the rpm 50 or so from that 'free' idle brings out the noise. Get past 1000 rpm, long gone.

==========================

Originally Posted by IC2

Mike - Thanks. I hope to not even have to pull the engine and especially do a rebore. If I do, I can probably find you

As far as that clunk - yep, pulling away from a light or putting it in gear from a standstill and dropping the rpm 50 or so from that 'free' idle brings out the noise. Get past 1000 rpm, long gone.==========================

Ugh.. I was hoping you'd say nope, it happens differently. Anyway, the speed pro's are brand new as are the rings but like I said 30 over. They're not going anywhere for awhile so if you need them, you know how to find me...

As an aside, when I discovered that broken off skirt in the 6 cylinder, I honed the cylinder in the truck and shoved a new standard piston w\rings in the hole and the customer was happy 'cause it was quiet! It never smoked or rattled after that! I have no idea why it broke one skirt.
.....