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M1BYT > TECHNI 16.03.03 18:41l 55 Lines 2376 Bytes #999 (0) @ WW
BID : 871484M1BYT
Read: DB0FHN GUEST OE7FMI
Subj: Re: my car is using oil
Path: DB0FHN<DB0RGB<OE5XBL<OE3XSR<OK0PBX<OK0PAD<OK0PPL<RZ6HXA<SP7MGD<ON0BEL<
GB7FCR
Sent: 030316/1345Z @:GB7FCR.#16.GBR.EU #:51216 [Blackpool] FBB-7.03a $:871484M1
From: M1BYT@GB7FCR.#16.GBR.EU
To : TECHNI@WW
ZR4LP Opined with considerable skill:-
> Ever heard a friend say my car is so good and so fast and so old and it
> does not even use a drop of oil.
>
> Just wondering if that is really normal. most cars have a breather pipe
> running from the top of the head to the intake manifold.Oil vapour will be
> sucked out.
> The oil rings on the pistons: Isnt there suppose to pass a teenie weenie
> little bit of oil past them to lubricate the cylinder sidewalls?
All engines use a little oil....
It is just not measurable with sufficient accuracy between oil changes.
Oil is passed by the piston rings, the valve stem seals and by the many
other seals such as the one behind the flywheel. The crankcase breather
is only intended to allow the crankcase pressure to equalise with the
atmosphere, but as an engine becomes worn they tend to be used more and
more due to piston blow by and pass a great deal of burnt oil fumes back
into the combustion chambers. Lift the oil filler cap and you can often
smell the burnt oil and see the fumes in a worn engine.
I check my oil level with the car still in my garage after it has stood
level for at least eight hours, as the most accurate way to check it. My
engine has now done 126K and I can detect no drop in level between
services.
Over filling with oil can be as bad as not putting enough in. The space
above the oil is intended to act as a buffer for the motion of the
pistons. Reduce the size of this buffer zone and you may find the
additional pressure causes early failure of the crank shaft and timing
case oil seals.
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º 73 from Harry, M1BYT @ GB7FCR.#16.GBR.EU º
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º International Museums Weekend 14th+15th June 2003 º
º www.ukradioamateur.org/imw/index.html º
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º The ARC's FL/RAE courses + Newcomers Intro to º
º to amateur radio:- http://www.ukradioamateur.org/ º
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º QTH: Garforth, W. Yorks.. º Timed 12:28 º
º harry.m1byt@tiscali.co.uk º 16 Mar 2003 º
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