If the head has not been crack tested it certainly should be before any more
time and funds are expended. You will then be able to inspect the head
gasket to see what the condition is/was. Have you checked to see if the
water jacket is being pressurized by one or more of the cylinders. There's
something very basic here that has eluded you somehow. Cracks in heads are
not all that uncommon especially if the engine was overheated at some point
in it's past.
I'm also concerned the head is running some ~60 degrees hotter than the
block. I'm sure you have confirmed the engine is in fact filled with
coolant.
Russ Moore
-----Original Message-----
From: fot-bounces@autox.team.net [mailto:fot-bounces@autox.team.net] On
Behalf Of SCOTT JANZEN
Sent: Wednesday, October 02, 2013 8:18 AM
To: Andy Packard
Cc: fot@autox.team.net
Subject: Re: [Fot] TR250 oil pressure update
I'm puzzled by the leak down test numbers. My gauges have an input of 100
psi and read leakage as a percentage, 0-5 being good. Is this equivalent?
Certainly sounds like a head gasket or a crack that opens up with heat in
the head.
Sent from my mobile device
On Oct 2, 2013, at 3:02 AM, Andy Packard <apackard68@att.net> wrote:
> Leak down test at 90psi. All cylinders were at 82-84psi. Wish we could
> find definite data pointing us to the problem, although several if you
> have said head gasket based on the temp differences.
>
> Andy Packard
> Sent from my iPhone
>
> On Oct 1, 2013, at 7:41 PM, Joseph <josephspiano@comcast.net> wrote:
>
>> I had that problem - had wrong head gasket! Good luck!
>> Joseph Alkana
>> '72 TR 6
>> From: Andy Packard
>> Sent: 10/1/2013 5:35 PM
>> To: <taylorturbo@yahoo.com>; fot@autox.team.net;
>> <6pack@autox.team.net>
>> Subject: Re: [6pack] TR250 oil pressure update
>>
>> Thanks Dick. We've isolated it to be either water or head gasket as
>> you
> said.
>> The head gets super hot at 202 deg witht he block at 150 or less.
>> Water is flowing rapidly through the radiator but then boils over
>> after a few
> minutes
>> of 1500-2000 rpm idling.
>> I just pulled the water pump housing and I'm trying to figure the
>> next
> move.
>> Water system bubbled but does not burp even with thermostat removed.
>>
>> Andy Packard
>> Sent from my iPhone
>>
>> On Oct 1, 2013, at 11:40 AM, Sally or Dick Taylor
>> <tr6taylor@webtv.net>
>> wrote:
>>
>>> Andy --- I'm reasonably certain you have an air lock in the cooling
> system.
>> Try removing the thermostat and running the engine. Look for air
>> bubbles returning to the top of the radiator. If bubbles are present,
>> continue
> running
>> the engine till they're gone. Use a portable fan in front of the
>> grill
> opening
>> to keep the engine cool, if needed, during this exercise.
>>>
>>> Another possibility, tho rare, would be if something about the head
> gasket
>> isn't allowing the coolant to circulate.
>>>
>>> You will no doubt slap your forehead when you find the reason!
>>>
>>> Dick
>>>
>>>> From: apackard68@att.net
>>>> Date: Tue, 1 Oct 2013 09:53:45 -0700
>>>> To: fot@autox.team.net; 6pack@autox.team.net
>>>> Subject: [6pack] TR250 oil pressure update
>>>>
>>>> Hi all. It's not for lack of effort that I can't solve my oil
>>>> pressure problem.
>>>> On Saturday, I dropped the pan and used plastigauge on all my
>>>> bearings
>> and
>>>> they all checked out tighter than the .002 marking but not to the
>>>> .0015
>> mark,
>>>> within Bentley specs. The oil pump seemed fine and pulled oil when
>>>> spun
> in
>> my
>>>> hand. Once in the car though, problems getting it circulated. I
>>>> drove
> it
>> to
>>>> the shop helping with this after installing the HD spring in the
>> regulator. I
>>>> had more pressure at first, but when I arrived and slowed to an
>>>> idle it
>> was
>>>> gone and the water started boiling. Stuck on this one and trying to
> stay
>>>> patient.
>>>>
>>>> Andy Packard
>>>>
>>>> ________________________________________
>>>>
>>>> 6pack@autox.team.net
>>>>
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>>
>> ________________________________________
>>
>> 6pack@autox.team.net
>>
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