[Healeys] Off comes the head...Update

Mon Feb 13 13:02:49 MST 2017

My 2660 had a major leak from the oil system into the coolant system. Evidently the oil pressure would force oil one way while the engine was running, but their was enough resistance to keep the coolant from flowing the other way when the engine was warm and under pressure. Thus I had oil in the coolant, but no coolant in the oil. Oil contamination can cause sludge to form in the coolant system. On rebuild the machinist discovered that the block had been improperly machined resulting in a 0.012" difference from corner to corner. The oil passage between the block and head is a critical area anyway with some engines having chronic oil and/or coolant leaks to the exterior of the engine at the number plate. I'm sure the poorly machined block didn't help. With a little more care in getting the proper deck dimensions and block and head surface preparation, and using a Denis Welch MLS gasket I hope to cure both of these problems. Not running yet, but we will see.

Bill Lawrence

BN1 #554

From: Healeys <healeys-bounces at autox.team.net> on behalf of Al Fuller <al at bighealey.org>
Sent: Monday, February 13, 2017 2:22:32 PM
To: 'Healey List'
Subject: Re: [Healeys] Off comes the head...Update

Wow – sounds like good news overall!

Any idea of what would have prevented this?  In other words, is there a method that is preferable to the hot tank when doing an engine?

Al Fuller
al at bighealey dot org
'65 BJ-8
'85 Rx-7

From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of Bruce Steele
Sent: Friday, February 10, 2017 7:02 PM
To: 'Healey List' <healeys at autox.team.net>
Subject: Re: [Healeys] Off comes the head...Update

So, the machine shop has gone through my block and low and behold, oil is not seeping from the transverse oil gallery into the water jacket.  They pressurized the oil gallery to 70 PSI and it help pressure; nothing bleed into the water jacket.  Rather, the shop cooked out a bag full of sludge from the water jacket in the back of the block.  Apparently, the regular hot tank dipping before didn’t dislodge all this gunk, and the circulating coolant would dissolve just enough to foul the coolant with the oily mess that sure looked like fresh motor oil mixing with the coolant.  Fooled me, for sure.  For good measure, we will coat the water jacket with some epoxy, then rebuild the motor with Denis Welch pistons, street cam, bucket lifters, hollow push rods and fly wheel.  I am excited to experience how it will run with the new DW parts to go with my DW oil pump I installed years ago.

Bruce Steele
Brea, CA
1960 BN7

From: Bruce Steele [mailto:healeybruce at roadrunner.com]
Sent: Thursday, November 24, 2016 10:15 PM
To: 'Healey List' <healeys at autox.team.net<mailto:healeys at autox.team.net>>
Subject: Off comes the head...

Finally diving in to diagnose and fix the oil in the coolant. Hoping it's just the head gasket, but since it started after the engine was done 11 years ago, I am suspicious that it's the oil gallery-water jacket wall between number 4 and 5 cylinders seeping high pressure oil into the coolant. Has anyone actually had or known anyone with this problem?

Bruce Steele
Brea, CA
1960 BN7

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