first of all
i wasnt asking why or how i blew my headgasket
i questioned whether my pistons shudd have this
much wear after only 95 miles…
secondly
i know it was a bone head move by not tightening
the rad cap enuff but if u think about it, it may be
a good thing because i might have been sold a set
of used pistons at brand new price
and sirtef9 to answer your question
i drove it with the cap loose for about 12 miles
it reached the H after about 7 or 8 miles
so i was maybe driving while it was hot for about 4 miles 5 tops
its just that i have seen pistons after about 500 miles and they look like this
and the piston in the second picture just seemed like a little much because the p73 is actually a lil smoothed out from the combustion… sorry just seemed weird…
but brand new pistons would look similar after such few miles?
I just wanted more information to help you out, and honestly they don’t look bad at all unless your running something clean like methanal. 4 to 5 miles of driving it in the “H” will warp your head so be careful…
id be more worried about the rust on the cly. walls but it looks like it would wipe off.my buddys p73 pistions looked cleaner the that after 5k when well his motor got sick and puked up a rod.
dude, was your car tuned?? any idea how rich or lean your motor was running? if not, then dont worry
theres nothing wrong with your pistons. its just carbon build up. you can pull the pistons out and get them cleaned off if you want.
i’ve seen pistons come out of 200whp allmotor cars that are bblack across the entire top.
if there was mechanical damage, i’d worry, but nothing is wrong as far as i can see. you have to remember yo uhave high compression… the CC will get hotter than a stock motor, not to mention, again, i dont know if your motor was running right in the first place.
at this point, there is really no way to tell if you were sold used pistons or not. even 500 miles on pistons is basically new. but new pistons will get hot and discolor, not to mention, if you were running rich, you’ll get more carbon build up.
you didnt ask to see the motor before your builder slapped the head on?? in that case, just stop sketching in your head, and just clean the rust off and slap the head back on
:rockon:
Dude, that is pretty normal. You do know that the pistons are pretty porous meaning they they will look dirtier than say, forged pistons when in contact with carbon, carbon being the byproduct of combustion? How intensive was the rebuild? I see you said it was bored .25 over, is that in mm? Were the pistons bought by yourself? How positive are you that they are 81.25mm pistons? Being that it was bored, were the bearings and everything replaced? Not that it matters as far as the rich burn of your motor but it does give us insight about what type of mechanic did the work. I think we need some mo/moe/more answers my friend .
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