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<div class="moz-cite-prefix">The origin of the damage looks very
much like a cold engine forced to deliver peak performance.<br>
Always heat up any engine slowly by driving normally until the oil
pressure starts to drop a bit, i.e. usually around 15 minutes.<br>
Another cause may be running the engine without thermostat.<br>
<br>
Kees Oudesluijs.<br>
<br>
<br>
Op 30-8-2017 om 14:55 schreef David Porter:<br>
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<p>Not at all uncommon on the 4 cyl engines. Easy solution is to
have copper/steel/whatever O-rings made to sit atop the regular
head gasket. I used to have Mordy Dunst at Gasket Works make
them for me.. Unsure if he is still in business. Typically I had
them at .002-.003 in thickness. This allows a bit more sealing
around the bores. Used a smear of lube to hold them in position
when dropping the head on. Follow installation with a good
coolant sealant (K-Seal) prophyactically.</p>
<p>DaveP<br>
</p>
<br>
<div class="moz-cite-prefix">On 8/29/2017 10:46 AM, Wayne Schultz
wrote:<br>
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<div dir="ltr">Hello,
<div><br>
</div>
<div> My friend Bob had a problem with his Early
BN1. The engine was rebuilt 2K miles ago or so and after
several trips at speed on the highway cylinders 2 and 3 lost
compression. The picture explains what we found when we
pulled the head. The head has a 4 thousandth warp between
cylinders 2 and 3 and a 2 thousandth warp between cylinders
1 and 2. The engine was rebuilt by the previous owner so we
don't know what was done , but the head looks like it was
milled before. Bob had planed on installing a aluminum head
soon anyway so not a big deal. I thought people would like
the picture. We are installing a Denis Welsh head with new
hardware and their steel head gasket. </div>
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<div> Wayne</div>
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<div class="moz-signature">-- <br>
Dave Porter Porter Custom Bicycles 2909 Arno St. NE Albuquerque,
NM 87107 505-352-1378 Go HERE: my world <a
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