Although I am not an engine expert, with worn valve seals you will have
blue smoke at acceleration and engine braking (what happens if you
suddenly release the accelerator at high speed?).
I guess you car is equipped with a PCV system you might check it, maybe
the valve is stuck. You can clean it with solvent then.
Good luck,
Robert
P.S.: Don't forget: even when our Imperials where new, it was not unusual
for them to use some oil :)
----- Original Message -----
From: <therichardsonfamily@xxxxxxxxxxx>
To: "IML" <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Tuesday, November 13, 2007 7:20 PM
Subject: IML: Oil usage theories
Hello everyone (& Dave):
I have excessive oil usage on my '67 Imperial engine. Not much of a
surprise with 150K+, and sitting for a decade. 1 quart/150 miles at 70
mph, & 1 quart/300 miles at 45ish avg. mph around town. I know the
correct answer is to do a complete rebuild. Can't quite pop for that
right now, as there are too many other priorities for my next $3000.
Compression check months ago was OK, no blue smoke at cold start up (even
if sitting for days), no blue smoke at hard acceleration, or after idle -
just no blue smoke at all. Idles and drives quite well, gets about 11
mpg. Pulled the plugs yesterday after 3000 miles, and they were nicely
tanned/greyed, clean everywhere except wet oil on the threads.
Dave had mentioned earlier that big block Mopars have a tendency to need
valve seals. If that is what's indicated by the above evidence, I could
probably find the resources to pull the heads.
Any expert (or otherwise) theories and thoughts would be most welcomed.
Dan Richardson
300L Family Heirloom
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