Author Topic: Head bolt torque procedure for AAZ metal gasket on 1.6NA hyd?  (Read 3570 times)

April 29, 2010, 10:56:42 pm

wolf_walker

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It occurred to me I have an A1 bentley but not for the A2, or later.
What's the story with torquing the bolts, lube or not, etc, for the
layered metal AAZ headgasket I've been putting off installing on my
ole hyd head 1.6NA?


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Reply #1April 30, 2010, 07:14:55 am

theman53

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Re: Head bolt torque procedure for AAZ metal gasket on 1.6NA hyd?
« Reply #1 on: April 30, 2010, 07:14:55 am »
quoted from zukgod1  FOR ARP...Stock bolts are different.

This is what I've done as to torque
ARP fasteners.

30 lbs
45 lbs
65 lbs
80 lbs

Warm up engine with cap off coolant bottle let it cool, re torque to 95 lbs.

Personally I use MLS gaskets and to to 100lbs min my bud 52 wileys went to 110.

Others may argue this and say 95 is too high I suspect but I'll say this, Ran 35 psi regularly and not a single gasket failure. Even hit 40 psi a couple times.
Later, turned it down and kept it 30 psi or under as I got tired of the pile of turbo's in my shed getting larger. 

Car is still running great.

Originally I was running a 3 notch when it called for a 1 notch, also had larger pre chamber installed. was kinda hard to start so I switched to a 1 notch gasket, hard starting gone.

Reply #2April 30, 2010, 09:50:04 am

wolf_walker

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Re: Head bolt torque procedure for AAZ metal gasket on 1.6NA hyd?
« Reply #2 on: April 30, 2010, 09:50:04 am »
Interesting, but I need plain stock stretch bolt torque, no turbo, no ARP, just an old 1.6.  :)
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