[Healeys] Head Gasket

Michael Salter michaelsalter at gmail.com
Thu Feb 24 05:41:42 MST 2022


My bad ... as John has pointed out ...
"7 psi on the 100."
not 4 as I wrote above.


M.

On Thu., Feb. 24, 2022, 4:47 a.m. john harper via Healeys, <
healeys at autox.team.net> wrote:

> All
>
> The pressure on the water pump is defined by the radiator cap. 7 psi on
> the 100.
>
> Best regards
>
> On Thu, 24 Feb 2022 at 00:31, Alan Seigrist via Healeys <
> healeys at autox.team.net> wrote:
>
>> Henry -
>>
>> All water passages in Austin motors are done like this.  This is because
>> the water pump is on the front of the motor, and the water outlet is in the
>> front of the motor, so the jacket forces water to the back on the block
>> then back to the front on the head, but also needs some cool water in the
>> front too.  it’s meant to make sure the water is the same temp whether it’s
>> in the front or the back of the engine.  Don’t mess with the passages or
>> you’ll end up with hot spots on the motor.
>>
>> Best,
>>
>> Alan
>>
>> On Thu, 24 Feb 2022 at 4:03 AM, Henry G Leach via Healeys <
>> healeys at autox.team.net> wrote:
>>
>>> Has anyone ever stuck a magnet to a Payen *copper* gasket? I did-its a
>>> steel gasket with a copper coating. There is a real engineering issue with
>>> the 2660cc block and I am not sure why it is configured as it is. There may
>>> have been a study done on the engine's water flow way back then and some
>>> modifications made for cooling. It does not add up or make sense, however.
>>>
>>> So, look at this head and the gasket and then the block. Why are the
>>> water passages reduced on the jackets shown?  Then too, why is there no
>>> passage in one area marked that is actually open for water on the head*
>>> and* gasket? This is one "hot spot" found between 2-3 cylinders when
>>> read with a heat gun.
>>>
>>> I was tempted to drill out the opening in the block before re-assembling
>>> my head, but thought better of it. I would never question engineering
>>> technology of BMC. Modern day replacements have that same area blocked.
>>> Never-the-less, can anyone explain this concept to me; the reason for this
>>> and a 4lb. radiator cap. This engine needs water, lots of it to keep it
>>> cool. Why restrict it?  Then too, aluminum has its own set of issues that
>>> may/may not improve the cooling capacity of some old, thick cast iron
>>> block. Maybe throwing money at it has an effect.  Hank
>>>
>>> -----------------------------------------
>>> From: gradea1 at charter.net
>>> To: "Steven Kingsbury"
>>> Cc: "Healey Mail List"
>>> Sent: Tuesday February 22 2022 12:23:07PM
>>> Subject: RE: [Healeys] Head Gasket Woes Part Two
>>>
>>> Steven-that's a real heavy piston at .060 (compression ratio 9:1?) Was
>>> there any defect in head prior to assembly? Magnafluxed? There is an outfit
>>> Midwest Cylinder Head that can repair that for about $500, or else is on to
>>> Denis Welch for about $4K.
>>>
>>> I just had my head off and checked-they shaved .003 to get it flat.
>>> Fingers crossed-head gasket was not blown, but water in oil. I'm hoping it
>>> was water intrusion from rocker studs. Hank
>>>
>>> -----------------------------------------
>>> From: "Steven Kingsbury via Healeys"
>>> To: "Healey Mail List"
>>> Cc:
>>> Sent: Tuesday February 22 2022 11:28:21AM
>>> Subject: [Healeys] Head Gasket Woes Part Two
>>>
>>> Luckily the pistons weren't frozen, nor the rings in the pistons, but
>>> when I turned the head over to inspect, I got the really bad news.
>>>
>>> [image: INBOX530788498d9fa86f504913dab139d4d9ef6]
>>>
>>> Oh well. I guess some JB Weld might hold!?  Ha! Damn it Jim.
>>> S
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