[Healeys] Healey BN1 Head gasket

Tue Aug 29 20:56:41 MDT 2017


I had the same problem with my BN1. Machining the head and using a variety of head gaskets didn't solve the problem. When I finally removed the engine for a rebuild the machinist found that the block had been milled out of square and had a rise   of .012" from corner to corner. I recommend a thorough inspection of the block to assure it is flat before fitting the new head. It would be disappointing to put a lot of money and time into this and then to have it recur.

From: Healeys <healeys-bounces at autox.team.net> on behalf of Wayne Schultz <waschu2 at gmail.com>
Sent: Tuesday, August 29, 2017 4:46:53 PM
To: healeys at autox.team.net
Subject: [Healeys] Healey BN1 Head gasket


           My friend Bob had a problem with his Early BN1. The engine was rebuilt 2K miles ago or so and after several trips at speed on the highway cylinders 2 and 3 lost compression. The picture explains what we found when we pulled the head. The head has a 4 thousandth warp between cylinders 2 and 3 and a 2 thousandth warp between cylinders 1 and 2. The engine was rebuilt by the previous owner so we don't know what was done , but the head looks like it was milled before. Bob  had planed on installing a aluminum head soon anyway so not a big deal. I thought people would like the picture.  We are installing a Denis Welsh head with new hardware and their steel head gasket.

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