2002C5COUPE

iTrader: (3)

My brand new 1/2" Snap On impact with 110psi (275 ft/lbs.) would not budge my head bolts.

The heads had ARP bolts holding them down, could not having moly lube have made the bolts seize in the heads? It got hot 1 time because it threw a belt, could that be it?

My dad is a real big guy, it took everything he had on a 2' break over to get them out.

Any ideas?

ss ware

try a hand torch to heat them up. I had the same problem. Wait until they are glowing and they come off pretty easy. Just be careful.

2002C5COUPE

iTrader: (3)

My dad got them off, but i was wondering why they were that tight? Is it normal?

Brains

iTrader: (7)

They're pretty darned tight, but I never have much trouble with my 2 foot breaker bar. I never use an impact on head bolts (going in OR coming out) since I prefer doing that by hand. If they were significantly difficult, check the threads to make sure there's no galling, indicating damaged threads.

Ping King

iTrader: (20)

yea...ARP usually supplies moly lube for accurate torque readings.

did any thread come out with them?

REDWS6ROCKET

iTrader: (4)

no impacts you can easily pull threads on the aluminum block

Y2K SS

iTrader: (1)

wait till you gotta torque them back on

warpwr

Another tip: Put a length of pipe or tubing on the end of the breaker bar handle to add some leverage. For removals only of course. Might save somebody a hernia.

pdd

iTrader: (3)

i was thining the same but it shouldnt be to bad with a extension on the torque wrench. i have a 4ft torque wrench thats good for 600ft lbs. makes this job a cake walk

Steve Bryant

iTrader: (1)

I would wonder if:

1. the threads were properly cleaned (chased) and blown out before installation of the ARP's.

2. the threads of the new bolts were lubricated with the ARP (or similar) lube

If ever, you don't have the assembly lube, go buy some anti-seize and use that. As a rule, I assemble everything with anti-seize at least. It doesn't take a lot of the stuff. Just brush it on the threads lightly but with complete coverage. Always mix up the anti-seize before use. For anything critical like head, main cap or rod cap bolts or studs/nuts, it's far better to use the assembly lube.

Steve

Crazy Man

iTrader: (6)

I would wonder the same thing sounds like they were hydrolocked to me

Ping King

iTrader: (20)

i use never-seaze or locktite on everything too...but for something critical like rod bolts, head bolts, or mains...you should definately use a moly lube that the bolt manufacterer supplies.

someone did a test on somewhere...forgot where i saw it...but the torque readings and clamping force was actually higher with ARP's lube compared to straight oil or never seaze.