|10-17-2013 08:18 PM|
Between the bolt head or nut when clamping down on aluminum there goes hardened, ground washer, this is not something you'll find at the home improvement center near you. This washer prevents the rotation forces of the bolt head or nut from digging into the aluminum which will happen without the washer reguardless of the lubricant used. The gouging of the aluminum not only damages the part but also provides a false torque reading. Plus the damage doesn't stop with the installation, the aluminum continues to plastically deform under the fastener from the clamping force among others allowing said fastener(s) to loosen over time. Some of the others are; the aluminum has a greater amount of expansion and contraction with changes in temperature than iron or steel so it is constantly working into the fastener when it heats up and falls loose when it cools, this takes chunks of aluminum out from under the fastener head as well. The hard, ground washer helps reduce this as well as the other functions it performs buy placing the fastener load over a wider support area.
Get on ARP's web site and study what they say, call 'em, what-ever; but follow their instructions not the crap you get from friends, the corner shop, or on the web, it'll save you basket load of trouble down the road.
Always remember the "cheap way out....leads back in!"
Vasolene, well you know what that's good for, use it there, not on fasteners.
|10-17-2013 06:37 PM|
|maddart||They are aluminum heads.|
|10-17-2013 06:18 PM|
|10-17-2013 06:12 PM|
|1971BB427||Are these aluminum heads? I thought ARP only supplied washers with bolts for aluminum head installs?|
|10-17-2013 03:14 PM|
|maddart||I was going to use the ptfe on the threads and vaseline under the head bolt/washer. I have a builders book recommending vaseline. Thoughts?|
|10-17-2013 01:30 PM|
|10-17-2013 10:46 AM|
• ARP web site
|10-17-2013 10:04 AM|
"If some is good, then more is better and too much is just right."
|10-17-2013 08:10 AM|
No, RTV is not correct. It's too thick and will give false torque readings, as well as clog things up when it goes to the wrong places.
The Teflon pipe "dope" is okay. We use Permatex "Aviation" for this, on the threads ONLY. Unless the heads have been drastically ported exposing the bolt holes between intake runners, no need for sealer on the top. A drop of engine oil is all that's called for.
When it comes to sealer, if a little is enough, A LITTLE IS ENOUGH! (a LOT is NOT better)
|10-12-2013 04:59 PM|
|68NovaSS||Here's the torque pattern.|
|10-12-2013 03:08 PM|
Yes it is the sbc
|10-12-2013 02:55 PM|
They were done correctly....RTV silicone sealer, #2 Permatex, or Teflon pipe thread sealer on threads, and motor oil or anti-sieze under washer and bolt head.
Assuming this is the SBC you are working on....
Torque to factory spec (70 ft.lbs.) in the proper sequence, in at least 3 steps - i.e. 25 ft.lbs. then 50 ft.lbs. then final at 70 ft.lbs.
|10-12-2013 01:16 PM|
ARP head bolts
Removed heads and all bolts are ARP. It looks like a blue RTV was used on lower portion of bolts and anti sieze up top.
I want to know the proper sealant and torque lube to use and how to apply and the proper torque setting for these bolts.