Is permatex thread sealant #59234 good for sealing head bolts

It might be, but I prefer the ARP stuff. ARP thread sealant on the threads, ARP moly lube under the washers.

If it's a teflon based thread sealant, it should work.

I use the GM liquid teflon sealer and ARP moly lube on the washers or bolt heads... pretty much the same as what Kevin said.

I had this issue when I was putting my engine togeather and I had a doubt in my mind so I called ARP and they told me it was fine as a sealant for the head bolts and that the only thing I needed to do differently was that I needed to torque the head bolts down to 73 foot pounds. The only difference between the arp sealant and the permitex sealant is that the permitex is more geared towards lubrication. So if you are using ARP head bolts you just need to torque them to 73 insted of 65.

ok im a retard, why would ya wana use sealant on head bolts? coolant trickle or something?

Loctite Pro-Loc (p/n 81800) works great for me.

Wasp,

It's a good idea to apply sealant to the thread of the head bolts and outer intake manifold bolts, since the bolts enter the cooling jackets. Coolant system pressure can force coolant past the straight threads and into the oil retuns on the heads, or other places that you really don't want coolant. Water outlet bolts are another good use for this sealant.

Don't use a standard Teflon-bearing pipe joint compound, since it remains viscous and can be eventually displaced by the coolant. Those compounds are intended for tapered pipe threads only. The Loctite/Permatex sealants are actually an anaerobic compund that will harden and prevent the seepage. It also lubricates the thread, so standard bolt torque values can be used.

i figured it had somethin to do with coolant gettin into the oil, only thing it could be i thought

The GM stuff is anaerobic.

Of course I'm with Vader. I used Loctite.

I'm guessing the GM sealant is a LocTite clone, possibly even made for them by LocTite/Permatex. I know it isn't just Teflon pipe thread compound.