My first impression based on your description would be head gasket. I
don't think a burnt valve would cause a great deal of smoke and it would
be a more bluish color. Normally white smoke would indicate coolant.
However, my first MGB was a 65 and on two occasions, it cranked out a
serious layer of white smoke that would have killed every mosquito
within a hundred yards. That happened when the top cover of the PCV
valve fell off but in both cases, I was able to locate it and reattach
it, fixing the smoking problem. Bizarre but true.
David Councill
67 BGT
72 B
dcouncill@msubillings.edu
-----Original Message-----
From: owner-mgs@autox.team.net [mailto:owner-mgs@autox.team.net] On
Behalf Of R. Martin Rogovein
Sent: Wednesday, July 06, 2005 4:07 PM
To: mgs@autox.team.net
Subject: big white cloud
I was driving the B today, noticed it was running a little rough, esp.
at
idle -
nothing really out of the ordinary, I thought maybe I got a tank of bad
fuel
or something.
Then, while waiting at a light the revs started to drop (it usually
idles
smoothly around 900) and it started to stutter.
I gave it some gas to keep it alive, and was rewarded with a white
smokescreen that would have done James Bond proud.
>From then on it kept running rough, smoking especially while
accellerating,
and seemed to be way down on power as well, and would ping if i tried to
give it gas too quickly in any gear.
Oil pressure was normal and stable (45 idle, 70 at speed), temp stayed
right
at N.
Engine has burnt oil since I got it (a quart every few tanks of gas -
probably rings), but I always am careful to keep it topped off (checked
today before I headed out and it was fine).
My guess, without opening anything up to see, is a burnt valve.
Do the symptoms fit, or do you pros have a better idea?
R Martin
70 roadster
Tel Aviv
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