Oil Scare that was not a scare
Oil Scare that was not a scare
Author
Discussion

philmcw

Original Poster:

177 posts

264 months

Friday 17th September 2004
quotequote all
Think I've been bit of a plonker..

Checked the oil on when I thought the engine was nice a warm - and shock horror no oil on dip stick

2.5 lts later and its 3/4 full on the old dippy stick.

Go for a spin the next day. Check the oil when I get back and its 1.5 inches above the max mark

Is there gonna be any consequneces of me leaving this, .e.g knackered cats, or should I try to drain some out ( That'll be fun ) or can you "suck some" out of the dip stick hole somehow ?

powerlord

771 posts

257 months

Friday 17th September 2004
quotequote all
no.. apart from wasting a tenner.

it'll just burn it off slowly (so I've been told) but personally don't see how this will happen on a dry sump engine.. it should just do no harm at all and take longer to need topping up again imho.

Consenting opinion seems to be to read oil level:

- get engine warm/operating temp (so 65 or so)
- while still running open the bonnet, take oil cap off, clean dipstick ready to insert.
-stop engine
- take oil level within 10 seconds or so
- take it again every 30 secs or so for a couple of minutes (some folk say it goes up and then down again)
- the max the level reached is the level of the oil.
-only put more oil in if it's really low (near minimum). there is no need to keep it topped up to max (as dry sump engine.. it sucks it is as required)

stu

basil brush

5,362 posts

279 months

Friday 17th September 2004
quotequote all
TvR filled mine about a litre above the max line when they serviced it. No problems at all, just longer to next top up.

mcspreader

328 posts

277 months

Saturday 18th September 2004
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I have been told that by someone who 'clamed to know???' that overfilled dry sump systems can in some circumstsnces over oil the engine by a tiny degree. The result of this may be that in a chain driven cam engine where the chain is within the oil jacket tahat excess oil is transported to the top of the heads and is can be unable to drain down because of constant replenishment. This is normally found in motorcycle engines where the chain is driven from the middle of the crank, which, while not being dry sumped, can swamp the valve gear leading to vaporisation and oil loss. The natural action of the chain is to lift oil up that is then centrufugally thrown off the cam's drive gear.
I think we need expert advive as to how dry sump lubrication affects oil use when no other factors are considered. Ford Motorsport conducted extesive tests in 70s and 80s on BDAs etc. They passed the info on to users. Anyone out there know?