Didnt read the ARP head bolt instructions.
Thread Starter
Drifting
Joined: Oct 2009
Posts: 1,385
Likes: 86
From: San Diego CA.
Didnt read the ARP head bolt instructions.
I installed one ZZ4 head last week. I installed the other today. Today I read the instructions. The washers go on a certain way. The ARP lube is required between the washer and the bolt head. Can I take out the bolts in sequence one at a time to fix and reinstall them properly? If I do need to start over, do I need another head gasket? Thanks guys...
Burning Brakes
Joined: Aug 2011
Posts: 831
Likes: 288
If it was me, I would take one out at a time starting with number one, do what you have to do to fix them, then put them back in again and re torque to specs. To reiterate, only take one out at a time, then reinstall, do not take them all out at once. But then again I have been known to do things in unusual ways.... Also I am not a ASE cert mechanic.....
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
As long as those washers were not deformed (or meant to deform when torqued) and you did not exceed a proper torque value applied to the bolts (and engine threads), I would do exactly as stated above....remove one at a time and reinstall as instructions call out.
Thread Starter
Drifting
Joined: Oct 2009
Posts: 1,385
Likes: 86
From: San Diego CA.
I'm a home mecanic as well. That sounds totaly logical to me. The motor has not been started so there is no heat cycle. I'll wait for one more agree before I do just that. Thanks...
Intermediate
Joined: Oct 2014
Posts: 38
Likes: 0
Aircraft Mechanic agrees. shouldn't warp or deform. The reason they put lube between washer and fastener is to give a wet torque. It gives less friction thus giving more tension on the fastener. Its surprisingly different than a dry torque.
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Instructor
Joined: Sep 2013
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From: Oklahoma City Oklahoma
St. Jude Donor '14
lubricated fasteners allow torque to the actual "spring load" of the fastener. Threaded fasteners are actually an inclined plane rolled into a spring. The spring tension of the inclined plane provides adhesion of mated surfaces. Torque limits are determined by measuring stresses of the load compared to detrimental effects of excessive load or excessive tension.
Le Mans Master
Joined: Oct 2007
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From: RI, Now Franklin/Nashville TN
All very interesting and the procedure I followed this past spring with my AFR heads BUT I suspect that there are MANY heads both aluminum and cast iron with bolts not properly lubed with washers and without washers that are torqued to spec and are just fine for street engines.
Le Mans Master
Joined: Oct 2007
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From: RI, Now Franklin/Nashville TN
Race Director
Joined: Apr 2000
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
All very interesting and the procedure I followed this past spring with my AFR heads BUT I suspect that there are MANY heads both aluminum and cast iron with bolts not properly lubed with washers and without washers that are torqued to spec and are just fine for street engines.
At your level you would probably be fine but I have gone through the procedure of replacing one bolt at a time on my heads once and no ill effects.
Le Mans Master
Joined: Oct 2010
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From: melbourne florida
2023 C3 of the Year Finalist - Modified
you will have no issue doing it that way as the gasket won't lose its crush. did you use the proper lube on the threads the first time? if not it may cinch it down more, so in effect you would have just torqued it in 4 steps rather than 3.
Melting Slicks
Joined: Dec 2009
Posts: 3,233
Likes: 657
From: Thunder Bay
Since we're talking about head bolts, if some of the head bolts go into water jackets and need sealant, should we put sealant on the threads of all the bolts so they get the same torque?
