ok so i have a turbo 81.5 b16 using arp head studs, at 7 psi i have blown three headgaskets 2 oem/golden eagle and one cometic. I am torquing my arp headstuds to 85 ft/lbs with moly lube. Everytime i have replaced the gaskets i check for flatness with a straight edge and everything seems to be kosher, i have now pulled the motor and am separating it to get the block decked/ head milled just to be on the safe side. is there anything i am doing wrong/not doing so that when i put everything back together i will not have this problem again

 

how much timing are you running?

 

i think base timing is 15 degrees, i am not sure other then that the guy the tuned my car set all of that, is there a way i can look at my maps and tell you, i am running a s200 on a p28, it ran fine after then tune the headgasket problem has been a recent thing within the last couple of months

 

anyone help me out?

 

can you post close up pics of your old spark plugs?(electrodes from the side and top) (They have to be detailed.

 

yea ill do that when i get home

 

fyi stock HG are fine for 81.5mm GE doesnt need to overbore them.

 

a stock b16 hg??

 

yeah

 

ok so here are the pics of the plugs, these are the plugs from the first two oem/ ge headgaskets, they are in no particular order and no coolant in combustion chamer



these are the pics from the most recent cometic headgasket, again they are in no particular order and there was coolant in cylinder number one, and they were used for about two hours before the incident




Modified by scuffywin at 10:09 PM 5/7/2008

 

bump for some help

 

sounds like something with the timing... btw you dont need to tq them that high, i have mine at 75 and no problems

 

oh well i was only following what arp told me to torque them to

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by scuffywin &raquo;</TD></TR><TR><TD CLASS="quote">oh well i was only following what arp told me to torque them to</TD></TR></TABLE>

You might want to consider getting a new set of studs as yours are probably stretched....bad.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ladysman &raquo;</TD></TR><TR><TD CLASS="quote">

You might want to consider getting a new set of studs as yours are probably stretched....bad. </TD></TR></TABLE>
yea good call