Ok so to make a long story short I had pulled my head and had it rebuilt a few months ago due to a burnt exhaust valve. (For the full length story check my "well she's hurt-mystery of the sudden #2 no compression misfire solved" thread). The car is stock save for a cat back and intake. Its my daily driver. I hardly ever beat on it. My goal was really to just get it fixed as soon as possible. So I got an oem composite hg and new arp head bolts. I used the suppiled arp assembly lube on the bolts, and torqed them in the order stated in the tsrm to 75ftlbs in three passes. I assumed this torque would be fine. Its also what arp recommends (i called them).
Not long after everything was done the temp gauge started going up and down for no obvious reason. I had no coolant loss, leaks, milky coolant, sweet smelling ehxaust, etc. Talked to the guy who did my cylinder head about it, and he suggested re torquing the head. So a few weeks ago, I went in to at least check them. I was shocked to find no less than 4 head bolts on the exh side alarmingly loose. Bolts on the intake side were pretty much as i had left them. So i brought all of them back up to 75/76lbs. The next day I decided to bring them up to about 80-82lbs for good measure, since ive heard of people torquing bolts from anywhere to 72 all the way to 100. Now, about a month or so since then, its just starting to act up again. After running at operating temp for say 10 to 15 minutes, the gauge will creep up between the half way point and the red hot mark, hang there for a minute or so, and then fall back down to the middle. And once it does this, it stays where its supposed to. I have a new toyota thermostat, new toyota coolant, and yes, a new temp sender in case anyone is wondering. I'm thinking I need to go back in and torque the bolts again. If i do, ill give them at least 88lbs. I just dont understand why the bolts got so loose. Any help would be greatly appreciated guys.
Not long after everything was done the temp gauge started going up and down for no obvious reason. I had no coolant loss, leaks, milky coolant, sweet smelling ehxaust, etc. Talked to the guy who did my cylinder head about it, and he suggested re torquing the head. So a few weeks ago, I went in to at least check them. I was shocked to find no less than 4 head bolts on the exh side alarmingly loose. Bolts on the intake side were pretty much as i had left them. So i brought all of them back up to 75/76lbs. The next day I decided to bring them up to about 80-82lbs for good measure, since ive heard of people torquing bolts from anywhere to 72 all the way to 100. Now, about a month or so since then, its just starting to act up again. After running at operating temp for say 10 to 15 minutes, the gauge will creep up between the half way point and the red hot mark, hang there for a minute or so, and then fall back down to the middle. And once it does this, it stays where its supposed to. I have a new toyota thermostat, new toyota coolant, and yes, a new temp sender in case anyone is wondering. I'm thinking I need to go back in and torque the bolts again. If i do, ill give them at least 88lbs. I just dont understand why the bolts got so loose. Any help would be greatly appreciated guys.
But yes I did burp it.