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 Post subject: Head Cold
PostPosted: Wed May 16, 2007 8:31 am 
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Turbo Slant 6

Joined: Tue Dec 12, 2006 7:44 pm
Posts: 792
Location: New England
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I've always torqued the cylinder head bolts when hot. If I'm assembling the head, what do people recommend for threadlocker, thread sealer and initial torque (cold)- I'm guessing one should re-torque when hot. Thanks for your input. I looked for a specific article on this forum, but didn't notice any.

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 Post subject:
PostPosted: Wed May 16, 2007 9:43 am 
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Joined: Mon Oct 21, 2002 11:08 am
Posts: 17298
Location: Blacksburg, VA
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I have never torqued the bolts hot, since the new gaskets do not need retorque. No threadlocker is needed, and I usually go higher (75-85 ft-lbs) than the FSM spec. I use oil on the threads, which some people don't like, but I've never had a gasket/bolt problem up to 11:1 and I've done 30-50 head swaps on Slants.

Lou

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 Post subject:
PostPosted: Wed May 16, 2007 10:23 am 
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Turbo Slant 6

Joined: Tue Dec 12, 2006 7:44 pm
Posts: 792
Location: New England
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Thanks Lou,
Maybe I'm thinking of some of the mainifold studs that need thread sealer because they are open to the water jacket?


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 Post subject:
PostPosted: Wed May 16, 2007 2:15 pm 
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Joined: Thu Oct 17, 2002 7:27 pm
Posts: 14770
Location: Park Forest, Illinoisy
Car Model: 68 Valiant
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Thanks Lou,
Maybe I'm thinking of some of the mainifold studs that need thread sealer because they are open to the water jacket?
Just the end 2. The rest are blind holes. :lol:

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 Post subject:
PostPosted: Wed May 16, 2007 2:21 pm 
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Turbo Slant 6

Joined: Tue Dec 12, 2006 7:44 pm
Posts: 792
Location: New England
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The end near the thermostat?


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 Post subject:
PostPosted: Wed May 16, 2007 3:46 pm 
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Supercharged
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Joined: Mon Sep 26, 2005 5:09 pm
Posts: 2946
Location: Gilbert, Arizona
Car Model: 1962 Plymouth Valiant Signet
Quote:
Quote:
Thanks Lou,
Maybe I'm thinking of some of the mainifold studs that need thread sealer because they are open to the water jacket?
Just the end 2. The rest are blind holes. :lol:
I'll have to check the head I'm working on because I was sure that when I blew out the holes they all went into the water jacket. I'm fairly sure that more than 2 of them did.

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'62 Valiant Signet, White
'98 Dodge Dakota
'06 Jeep Liberty

Growing older is unavoidable but growing up is strictly optional.


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 Post subject:
PostPosted: Wed May 16, 2007 4:44 pm 
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Guru
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Joined: Mon Oct 14, 2002 4:32 pm
Posts: 4880
Location: Working in Silicon Valley, USA
Car Model:
All the manifold studs go into the water jacket but some heads have so much rust build-up, they don't leak coolent out the hole when the stud is pulled. :shock:

On head torque, I always recheck the head's torque after the first heat cycle. I never use any sealer or thread locker. I do put some anti-seize compound on the bolt threads before installing the bolts.
DD


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 Post subject:
PostPosted: Wed May 16, 2007 5:24 pm 
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Supercharged
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Joined: Mon Sep 26, 2005 5:09 pm
Posts: 2946
Location: Gilbert, Arizona
Car Model: 1962 Plymouth Valiant Signet
Whew! I was afraid I might have a damaged head. The one for the motor I mean. :shock:

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'62 Valiant Signet, White
'98 Dodge Dakota
'06 Jeep Liberty

Growing older is unavoidable but growing up is strictly optional.


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