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Head Bolts ARP
I have ARP head bolts, and have read Ken,s tips on head gaskets. Are all the bolts on our 87 turbo engies going into coolant passages? I need to know this for correct torqing of the head! It looks to me like they do. Also what types of thread sealant should I use?
TIA Ed V. |
#2
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Re: Head Bolts ARP
ARP makes a sealant that's Teflon based and so does GM. It's basically some white "goop" that goes on the threads.
It's not really exotic stuff and the main thing is to use the correct torque spec for the lubricant used on the heads and shoulder of the bolt.
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Ken Mosher 1987 GN original owner 650+ HP Black 2015 BMW 328xi XDrive wagon 2012 Volkswagen Tiguan (the Tig!) Night Blue Met (sold) 2006 Trailblazer SS Red Jewel Tint 395 HP AWD (sold) 2014 Silverado LTZ Crew 4WD 2012 Honda VFR 1200F Tahitian Blue (sold) 2015 BMW S1000R Racing Red 2013 Honda CBR500R Red (wife's bike) 2014 Triumph Bonneville T100 2003 Harley Davidson V Rod Anniversary Edition |
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Re: Head Bolts ARP
According to ARP card that came with bolts, the torque is 65#'s on blind holes and 80#'s on ones that go into coolant passages! This is why I'm asking if all bolts go into coolant passages?I know this is critical in not blowing another gasket so I'm being causious! Thanks Ken for your help!Also at the factory, did the machine torque all bolts at the same time?
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#4
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Re: Head Bolts ARP
Stock bolts were Torque to Yield and were designed for a certain stretch based on a rotation of the head from a certain point.
Here's a couple good articles: http://www.gnttype.org/techarea/engine/enginepage.html http://www.gnttype.org/techarea/misc/bolts.html http://www.gnttype.org/techarea/misc/torque.html
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Ken Mosher 1987 GN original owner 650+ HP Black 2015 BMW 328xi XDrive wagon 2012 Volkswagen Tiguan (the Tig!) Night Blue Met (sold) 2006 Trailblazer SS Red Jewel Tint 395 HP AWD (sold) 2014 Silverado LTZ Crew 4WD 2012 Honda VFR 1200F Tahitian Blue (sold) 2015 BMW S1000R Racing Red 2013 Honda CBR500R Red (wife's bike) 2014 Triumph Bonneville T100 2003 Harley Davidson V Rod Anniversary Edition |
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