Headbolts
12-19-2008, 08:22 PM
#5
What i would suggest that i have seen done is people taking off the water pump hose and possibly thermostat housing and using a shop vac to suck out all of the coolant. This would help prevent any potential coolant from going into the bolt holes sine you wont be able to blow the holes out very well with the heads on the car. It would be worth the extra insurance for the $20 or so in coolant you'd be wasting.
Just curious, why are you replacing the head bolts?
Just curious, why are you replacing the head bolts?
12-19-2008, 08:29 PM
#6
A word of warning. The factory head bolts have a thread locker that is very hard. You need to clean this out to get the proper torque applied to the fastener.
Cleaning these holes is one of the most tedious steps and the biggest PITA of the whole process. I don't know how you can clean the bolt holes adequately with the heads still on. JMHO.
Cleaning these holes is one of the most tedious steps and the biggest PITA of the whole process. I don't know how you can clean the bolt holes adequately with the heads still on. JMHO.
12-19-2008, 08:33 PM
#7
Yeah i have heard the best way to clean the bolt holes is to take an hold head bolt and cut a groove down opposite sides of the threads to act as a 'tapping' bolt. The grooves will give the debris somewhere to go to when it gets re-threaded into the hole. Then you just blow the holes out.
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12-19-2008, 08:47 PM
#8
Yeah i have heard the best way to clean the bolt holes is to take an hold head bolt and cut a groove down opposite sides of the threads to act as a 'tapping' bolt. The grooves will give the debris somewhere to go to when it gets re-threaded into the hole. Then you just blow the holes out.
Big bolts - M11 x 2.00: part # 912-0011
Small bolts - M8 x 1.25: part # 912-0001
12-19-2008, 09:06 PM
#11
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boost its not as violent as spray, only 8psi the bolts should be fine, but they are correct, you will need to chase the threads, and that will be harder with the heads on the car for sure.
12-20-2008, 08:18 PM
#14
Again, just be very very careful when re-installing the new bolts. Hand tighten them without a ratchet and if you hit any tough spots before the bolt head his the cylinder head, stop, and back that bolt out and rerun a chaser through it. There is no worse feeling when working on a car then have a bolt strip, snap, or split the hole it's going into.