The residue is probably lead from the leaded gasoline that the car was born
to ingest. This is the reason that it is advisable to change the oil when
the engine is heated to normal operating temp. before draining the oil. The
warm oil suspends the debris and contaminates and allows it to drain out.
Tetraethyl lead has a habit of washing into the pan from the cylinder walls
and ending up in the bottom of the oil pan since it is a heavy metal
derivative.
Just my nickels worth of insight,
Larry Zink
Z Group Racing and Performance
Houston, Texas
-----Original Message-----
From: Malcolm Walker <walker05@camosun.bc.ca>
To: Rengrave@aol.com <Rengrave@aol.com>
Cc: The Usual Suspects <triumphs@autox.team.net>
Date: Thursday, November 05, 1998 11:01 PM
Subject: Gas in oil
>
>On Thu, 5 Nov 1998 Rengrave@aol.com wrote:
>
>> I have drained the oil and dropped the oil pan. The oil pan hasn't been
off
>> the car in the 15 years I've owned the car. In the bottom of the oil pan,
>> under all the very black oil, was a thick gray colored muck, I think this
is
>> worn steel powder that has settled over the years.
>
>Did the oil seem thin? Was it over-full? Did it smell like gas?
>
>Any of those are a sure sign of contamination ;-)
>
>As for your gray stuff... well, I dunno. Water-contamination comes out
>light brown (tan), but gray... beats me. Was there a lot, or just a thin
>layer?
>
>> I pulled the oil pump off and cleaned and measured, the allowable
clearance
>> between mating parts is max. .010", I had between .006" and .008" but I
>> noticed small scratches on all the outer services of the middle gear on
the
>> oil pump. How much affect do these scratches have on oil pressure using
20-50
>> castrol oil?
>
>Shouldn't be *too* much. Not so great, but it should work OK. Are they
>surface wear or deep scratches? Can get get anything (ie, a pencil) to
>make noise whilst moving over?
>
>-Malcolm
>* There is a FAQ for this list! Its temporary home is:
>http://www3.bc.sympatico.ca/walker/triumph/trfaq.htm
>
>
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