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[Ulap31]

Ok after many months of the car not running decided to check engine compression myself.
Results so far are
number 1 cylinder 113 psi,
number 3 cylinder 110,
number 5 cylinder 160 psi.
Wow one side done I was told compression was fine, annoyed the fact I've changed lots of parts that didn't need to.
Have Mayo in oil filler which isn't going away.
Going to try 2,4,6 compression now will post soon

[05omegav6]

Re mayo in the oil filler...

Use decent, ie not Castrol, preferably GM oil and use the car for decent, ie more than 40 miles, runs.

[Ulap31]

Ok compression for bank 2 as follows
Cylinder 2 120 psi
Cylinder 4 100 psi
Cylinder 6 190 psi
Don't see what changing the engine oil will help compression readings

[05omegav6]

Ok compression for bank 2 as follows
Cylinder 2 120 psi
Cylinder 4 100 psi
Cylinder 6 190 psi
Don't see what changing the engine oil will help compression readings

It won't... If you read my post it starts Re mayo in oil filler 

[Ulap31]

I've also realised I'm losing water.
Originally thought it was from the pipe that connects thermostat to top rubber pipe as changed thermostat a few months ago but am now sure that after fitting the 2 genuine rubber seals that's sorted that problem.
Am I looking at a head gasket change if so
What part numbers do I need for all the various gaskets, seals etc
Have new timing belt and water pump already fitted 3000 miles ago,
Also have locking kit

[05omegav6]

Water could be leaking from any where, including Hbv, heater matrix, radiator, oil cooler, thermostat, radiator thermoswitches and any of the coolant hoses...

3.2 headgasket failure is almost unheard of...

[omega2018]

Results so far are
number 1 cylinder 113 psi,
number 3 cylinder 110,
number 5 cylinder 160 psi.
Cylinder 2 120 psi
Cylinder 4 100 psi
Cylinder 6 190 psi

did you test it when warm?  for the 3.2 the compression should be in the range 161-202 psi.  If cold probably take off 15psi maybe more so that's 146-187.   max 15psi difference between cylinders.  harris can tell you all night about wet leaks and where they come from but your figures, coolant loss and the persistent mayo look like a leaking head gasket even though such a thing 'never happens on v6s' .  could be something else but those are not good figures. what mileage is it?

[Ulap31]

Mileage on the car is 105285 miles

[dbug]

Results so far are
number 1 cylinder 113 psi,
number 3 cylinder 110,
number 5 cylinder 160 psi.
Cylinder 2 120 psi
Cylinder 4 100 psi
Cylinder 6 190 psi

did you test it when warm?  for the 3.2 the compression should be in the range 161-202 psi.  If cold probably take off 15psi maybe more so that's 146-187.   max 15psi difference between cylinders.  harris can tell you all night about wet leaks and where they come from but your figures, coolant loss and the persistent mayo look like a leaking head gasket even though such a thing 'never happens on v6s' .  could be something else but those are not good figures. what mileage is it?

Bit of an understatement there - those figures are crap.  At best you have failed head gaskets (both banks), or all/any of the other culprits eg broken/worn piston rings, knackered valves, worn/damaged bores etc, on both banks.  Despite relatively "low" mileage, fraid its nackered.

Best suggestion is to bin it and fit a replacement engine.

[omega2018]

yeah i was trying to break it to him gently . 

does it put out steam from the exhaust when hot?

trying to stay positive,  it could all be just the head gaskets, those other nasties would account for low compression but none for coolant loss and mayo.

cylinder 6 is nice

[05omegav6]

Ignoring the fact that the layout of the oil and coolant passages makes it physically impossible for the two to mix
Sure it was MarkDTM that explained why this was the case...

Head gasket failure on these only results in loss of coolant from the rear outer corner of the head.

[05omegav6]

Incidentally bodged repair following cambelt issues would cause similar compression variations, and mayo on the dipstick would be more meaningful...

Your engine has issues, not one of which is headgasket related... More chance of Leicester beating Barca in next year's champions league 

[Ulap31]

The car does have steam from exhaust from cold for about 20 minutes of driving, fans were on constantly once warmed up, no signs of oil in expansion vessel.
I'm thinking I might strip it down,
I did this to my old 2.5 manual, new valve seals head gaskets etc and never had a problem after that.
Worst case engine is knackered, problem will be finding a quality replacement engine??

Would rather not replace as I want to keep it original as I can.

[omega2018]

Ignoring the fact that the layout of the oil and coolant passages makes it physically impossible for the two to mix
Sure it was MarkDTM that explained why this was the case...

so its physically impossible for coolant if in the combustion cylinders to get into the oil?   and on a 105K engine?   I think a dipstick needs checking here .

[05omegav6]

Ignoring the fact that the layout of the oil and coolant passages makes it physically impossible for the two to mix
Sure it was MarkDTM that explained why this was the case...

so its physically impossible for coolant if in the combustion cylinders to get into the oil?   and on a 105K engine?   I think a dipstick needs checking here .

On an Omega v6, yes. Speak to Mark.

Argumentative arse.

And 105k is nothing for a 3.2... 280k is perfectly achievable