>From: "Robert Duquette" <RobertDuquette@Sympatico.ca>
>Subject: dipstick tube / overfilling
>My dipstick tube is extremely . It does not have a washer on the
>dipstick,
>but I don't think that it should.
>How does one fix the dipstick holder? Replace it? Should it have an
>o-ring
>on it? Did the early 12CC 1275s have a rubber or felt on the dipstick?
>For
>that matter, did the 1098s have a rubber or felt? (Mine does, but is it
>right? )
>Why does overfilling cause smoking? Leaking out the back?
>Thanks!
>Robert D.
- -----Original Message-----
>What I don't understand is why the smoke only comes during a >particular
>part
>of the warm up and is accompanied by a rattle and then goes away???
Robert,
You are not alone with this phenomenon. My 69 Midget does it also and only
during the warm up of the engine. It doesn't smoke when first started cold,
nor when fully warmed up. It smokes when half warmed up, and leave quite a
smoke screen to the rear. Oil consumption is not excessive, in fact, the
engine uses very little oil.
I'm using the stock Smiths PVC system, non-sealed dipstick, everything
stock. Except, I rebuilt the 1275 with flat-top Hepolite pistons, standard
bore size. I suspect the smoking may be due to piston expansion. Pistons
have unequal mass on the thrust and non-thrust side and become oval shaped
until they reach full operating temperature. I've also experienced this
with a good International truck engine which didn't smoke, but produced a
slight piston slap noise until warmed up.
I'm not convinced that this is the definitive reason, but so far it is my
best guess.
Fred
Napanee, Ontario
69 Midget
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