From: Sarge (micdunn@ev1.net)
Date: Sun Jan 01 2006 - 08:11:08 PST
Ken,
I've seen this problem before. It was a stuck valve in my case. Pull the
valve cover and look to see if all of the exhaust valves are closing all the
way. One of them is probably misadjusted or intermittently sticking. If it
does not close all the way, burning fuel goes out the manifold causing it to
get cherry red. I know you said the compression is good, but take a look
anyway.
Be werry werry careful.
-Sarge
----- Original Message -----
From: <Muttguru@aol.com>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Saturday, December 31, 2005 1:54 PM
Subject: Re: [MV] Mystery Manifold Troubles........M151A2 Mutt
> Dear Listers,
>
> Advice needed:-Vehicle - M151A2 owned by colleague.
>
> Problem: - exhaust manifold gets red hot near the junction with the
down-pipe
> - almost immediately the engine runs.
>
> Checked so far:-
> Compression - within specs
> Timing - spot-on
> Air/Fuel Mixture - correct
> Exhaust system - no crush damage, no leaks, no restrictions, no blockages
> evident.
> Fuel - regular gas, no admixtures or additives.
> Plugs are mil-spec in good shape.
> No air leaks or damaged gaskets at carb or inlet / exhaust manifolds.
>
> Possible causes:-
> Manifold not of correct-grade steel (unlikely - but will try different
one)
> Restriction inside manifold near exhaust-flange junction (maybe bolt etc
> wedged in place) - will check when removed.
> Internal failure of one or both mufflers (but no signs of this).
>
> If anyone has further suggestions, they will really be appreciated. Will
> report back when this mystery is solved.
>
> thanks in advance & Happy New Year to all.
> Ken
>
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