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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