Mi 16 Engine Compression Results

[craig_007 1]

I assume by these results below that it rules out blow by (broken/worn rings)

 

Car is breathing heavy.Spitting out oil from breather at oil cap so thought I had better see if something had went wrong !

 

Anyway here's the results I got with engine at running temp and throttle fully open....

 

Cylinder 1 - 210 psi

Cylinder 2 - 210 psi

Cylinder 3 - 210 psi

Cylinder 4 - 215 psi

 

Are these compression figures acceptable for a rebuilt bottom end ?

 

The sarch will continue to see whats causing the oil problems !

[Tom Fenton 1,542]

Sound fine to me.

[craig_007 1]

Cheers Mate,

 

Glad to hear that.

[Baz 421]

That's pretty good tbh!

[craig_007 1]

Cheers Baz,

 

I'll just have to find out why it's throwing oil out the breather now !!

[craig_007 1]

Hi all,

 

Thought I would revive this rather start a new thread !!

 

My Mi16 still seems to have this breathing problem.

 

If I take a long right hander at high speed (flat out 5th) would this cause excess breathing at all. I.E oil from head surging into head breather ?

 

My oil catch can is half full (1 litre) after 1 track day and a spirited drive today.

 

Car is definately not burning oil and is going really good !!

 

I'm just curious if there could be under lying problem,If not and this is the normal after some hard fast cornering then thats fair enough !!

[welshpug 1,657]

is it a 1.9? might be the lack of a windage tray, only later 2.0's have them.

[stefan 4]

I've seen this happen a lot on race cars, after the race the oil just gets poured from the catch can back into the sump.

Maybe the windage tray would help, I personaly don't have any experience with them.

The pressures are OK, don't know if the head or block have been skimed, are the pistons and head gasket stock, but if none of the above is much off, 210 psi approximately equals to a compresion ratio of 10.6:1.

Edited July 16, 2010 by stefan

[craig_007 1]

It is infact the 1.9.

 

I had a little extra oil in the car for the track day in the first place.

 

If it's nothing serious I can deal with emptying catch can and filling oil every now and again.

 

Was just a little curious