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[Healeys] Off comes the head...Update

Subject: [Healeys] Off comes the head...Update
From: YNOTINK at msn.com (WILLIAM B LAWRENCE)
Date: Mon, 13 Feb 2017 20:02:49 +0000
References: <021b01d283fa$187921a0$496b64e0$@roadrunner.com>, <038f01d28604$aadf7c90$009e75b0$@bighealey.org>
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
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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