TimD Posted November 16, 2015 Posted November 16, 2015 I broke it..My car survived a dozen laps before ceasing to cooperate. Something let go at around 7000 rpm in third and I now have the following compression results15015000Gasket? Bent valve(s)?Taking the head off on Saturday to find out for sure. Quote
5e colin Posted November 16, 2015 Posted November 16, 2015 shit happens when your racing :) its the cost we pay to have fun lets hope its cracked pistons Quote
AdamB Posted November 16, 2015 Posted November 16, 2015 Haven't you only just replaced the headgasket? Quote
TimD Posted November 16, 2015 Author Posted November 16, 2015 I'm likely to blame, perhaps I made a mistake assembling. Perhaps the block that I checked as being flat isn't flat?Engine stills runs, albeit on two cylinders. Cams appear to be in one piece, there isn't any blow by to speak of either. Place your bets now.. Quote
AdamB Posted November 16, 2015 Posted November 16, 2015 What head bolts did you use? Did you re-check the torque after like 50 miles? Quote
enots Posted November 16, 2015 Posted November 16, 2015 I had this in the past gasket had blown between both cylinders still ran managed to limp home lol Quote
5e colin Posted November 16, 2015 Posted November 16, 2015 (edited) What head bolts did you use? Did you re-check the torque after like 50 miles? no need for that toyota bolts are stretch bolts dont need retorque unless you have those uprated bolts ?? Edited November 16, 2015 by 5e colin Quote
AdamB Posted November 17, 2015 Posted November 17, 2015 (edited) Did you re-use the headbolts? Or are they new ARP's?I just checked the installation instructions for 4E/5E head bolts, it doesn't mention anything about re-checking the torque so I might have got confused with something else there, my apologies. Edited November 17, 2015 by AdamB Quote
Mad Mike EP82 Posted November 17, 2015 Posted November 17, 2015 Dirty bolt holes giving incorrect torque reading causing head to lift blowing your head gasket. My guess. Quote
TimD Posted December 5, 2015 Author Posted December 5, 2015 Got the head off today.. Revealing a rather broken head gasket between 3 and 4. What was expected really, but there is some damage to the piston number 4, and some odd pitting on the cylinder wall, hard to photograph. Especially hard with my iPhone, I can't find my camera anywhere!! The damage to the piston wasn't there before, can't be certain if the pitting on the cylinder wall was there or not. I guess the big question is does this mean the bottom end needs repair as well? Head looks damage free to me, again apologies for the awful photos. What do we reckon? Quote
Mad Mike EP82 Posted December 5, 2015 Posted December 5, 2015 (edited) Bad times!!! Was the car mapped after you changed head gasket tim? If your after a forged motor let me know. Edited December 5, 2015 by Mad Mike EP82 Quote
5e colin Posted December 6, 2015 Posted December 6, 2015 damage on nr4 ?? cant see it on my old laptop the damage you see on the wals could be from bits of metal gasket flying against it Quote
Ollieh17 Posted December 6, 2015 Posted December 6, 2015 Id definetly be looking at the tune of the car with that damage. Quote
TimD Posted December 6, 2015 Author Posted December 6, 2015 I'd have thought it was the piece of gasket rattling around rather than the tune. Rest of the pistons are perfect Quote
Ollieh17 Posted December 6, 2015 Posted December 6, 2015 I meant to the gasket in the first place Quote
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