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KTL KTL is offline
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Join Date: Sep 2000
Location: Frankfort IL USA
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Originally Posted by Neil Harvey View Post

Before you send out the heads for rewire, check the washer platforms for deformation. This is common. The platforms are not flat and now the washer contacts the platform only on the outer edges. Under the tightening of the nut, the washer collapses and there goes the accuracy again. In recent testing we have found a huge issue with accuracy, just in how the head washer contacts the head even with flat platforms. The new kit includes are new washer that addresses this problem.
Amongst Neil's very good points, this one stood out to me most because I recently cleaned up some old head stud washers and they're not all that flat. So it's good idea to get your washers flat by truing them up on a flat plate with some wet sand paper. It's also good to make sure the washer and head surface "bite" to avoid loosening.

This link below is not to crap on the ARP studs, but to point out the benefit in having the thick washer provide some roughness/friction against the head

Pulling Head Studs - ARP Finding
Kevin L
Present: '86 Carrera, '79 911SC widebody conversion rolling racecar shell
Past: '87 Carrera
Old 05-29-2018, 08:46 AM
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