Brad, Does not sound serious - maybe. assuming there are no bad noises and you
have good oil pressure.
Questions:
1. Has it ever run well before the current problem?
2. How many miles since the so called rebuild?
3. What are all the compressions? Should be about 150 plus for a fresh motor.
4. If only one is low then it could be just stuck rings from prolonged
sitting - solution is wd40 et al into the cylinder for a few days etc.
5. If all are low it could be cam timing as someone said - valves not closing
correctly.
6. Air leak into inlet manifold, fuel starvation, et al could be the
problem.
I would suggest a very logical test sequence before taking the head off.
Robert N. Blair Yellow 65BJ8 rnbmail@yahoo.com
--- On Wed, 12/9/09, Attean Lake Lodge <info@atteanlodge.com> wrote:
> From: Attean Lake Lodge <info@atteanlodge.com>
> Subject: [Healeys] low compression
> To: healeys@autox.team.net
> Date: Wednesday, December 9, 2009, 11:33 AM
> Since I first started my car a couple
> of weeks ago I have just not been able
> to get to run even close to normal, in fact the only way I
> can keep it running
> is to hold the chokes out most all the way. The carbs were
> rebuilt by Joe
> Cuerto, plenty of fuel to them, proper fuel level in the
> bowls etc. etc. Valve
> and ignition timing dead on. I finally figured it had to be
> a vacuum problem
> so I just did a compression test...very depressing, a low
> of 100 and high of
> 125. The engine was out of the car when I bought it but had
> been completely
> rebuilt by a reputable guy who told me he did everything
> right including new
> rings, pistons, crank, valves, cam etc., he also had the
> head planed. Yes, I
> checked the clearances and they are fine, I have been able
> to run the engine
> for maybe 7 or 8 minutes at most before it sputters and
> dies. Did the
> rebuilder screw up or am I missing something here? Any
> thoughts will be much
> appreciated will I load the shotgun.
>
> Brad Holden
> 67 BJ8
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