What is a good sealant for cylinder head bolts?

Question

Permatex, Threadlocker, or maybe just lightly oil these bolts?

Answer 1

I've never had any problems with Permatex #2 on engines that require a sealant on the head bolts, like a Chevrolet small block
v-8, where the bolts go thru to the watter jacket in the block.
You should not use sealant on engines that have blind holes that do not go thru, as it may cause hydraulicing in the thread well giving you incorrect torque readings.

Answer 2

First thing is that you should replace a head bold after its been untorked. they carry alot of stressand stretch after a while. a good thing to do is chase the threads out in the block to remove the FACTORY SEALENT fo thoes that thing they are loctieed in ther not. you got then out with out heating them dident you. the best thing i found and use in al me engines at work and home on my toys ( pulling trucks racecars and mud buggies ) is gm thread sealent. its job is to lubracate the bolt for propor tourk sealing the bolt so no coolant gets by and helps keep the bolt tourked. hope this helps.
Even if its not a gm engine the sealent will still work!!!!

Answer 3

Not enough info here need to know make model of engine, some don't require any sealant, do a web search, for "sealant for cylinder head bolts" and decide for your self.....

Answer 4

Definately use the Loctite red.It is the strongest stuff i have ever used.Be sure you retighten the head bolts in the proper order because this red loctitie is so strong you may have problems getting it back off without an impact wrench.Here is what your lookin for---- http://psndealer.com/dealersite/images/temeculamotorsports/t%20loc%20red200.jpg

Answer 5

You shouldn't need sealant for cyclinder head bolts, usually they are stretch bolts that you tightened to the right torque and thats it.

Answer 6

Locktite