17 replies to this topic

[robbie-woods]

Okay so.while im driving the dipstick pops out which makes oil cover the engine bay. what could this be?

[Cosford Cowboy]

It could be caused by the dip stick fairies, although I think its more likely to be the rings or a head gasket fault.

[robbie-woods]

Could it be the oil pressure relief valve

[samsfern]

Excess crankcase pressure, normally caused by worn piston rings, nothing to do with oil pressure. Check the engines breathers are clear.

[robbie-woods]

Engine breather is clear i checked that! Didnt know if it was something a little bit cheaper! Lol

[bmcecosse]

Where is the breather connected - and how many does the engine have ??

[Cosford Cowboy]

Could it be the oil pressure relief valve

Er not a chance, the oil pressure in the "pressure" side has nothing to do with the blow by caused by crankcase pressure.

[L400RAS]

This could be a case of a (really) loose fitting dipstick. robbie - when the dipstick is inserted and removed, is there any resistance at all? If no resistance is felt, then any bump in the road could make the stick jump out the hole...

Replace the rubber o-ring on the stick (should piggle out with a screwdriver, then take that to a motor factors as a "pattern") OR the more expensive option: buy a new dipstick with the new o-ring already attached...

Edited by L400RAS, 06 November 2011 - 07:36 PM.

[Cosford Cowboy]

What O ring ?

[L400RAS]

What O ring ?

Half way up the stick, where it gets wider to seat in the hole, on that bit there is a rubber o-ring seal that gets worn / compressed over time, and does not seal the stick in the block. I would suggest to test / replace a 20p part, before suggesting a re-ring / re bore.

Edited by L400RAS, 06 November 2011 - 08:14 PM.

[dklawson]

I'm not familiar with my car's dipstick having an o-ring either. Is this strictly an A+ thing?

[L400RAS]

I'm not familiar with my car's dipstick having an o-ring either. Is this strictly an A+ thing?

Hi dklawson, yes just checked my A and then the A+ engine - only the A+ has the o-ring, sorry for the confusion. The A+ stick is like this one; you can just see the greeve which holds the o-ring

[Bungle]

might be worth getting a compression test done

[robbie-woods]

Ahh okay cheers for all ur help guys sounds like its a worn piston ring. can i just buy another set of rings and replaces thm. people are saying about.honing/boring out but i dont want to do this i just want the same as whats in there already is that possible to do?

[Cosford Cowboy]

I think that dipstick was only fitted to MPi's as my SPi doesn't have that type, mine is th eearlier type with the large moulded seal.