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[Markie]

I've removed old oil cooler and done as much cleaning as i care to on this matter.... :-?

Ive cleaned the surfaces with white spirit and removed the remains of the old sealant so new oil coler and plate mates perfectly

Got some questions. If one of our gurus or someone thats done this could help....

1. where exactly should i use the sealant when fiting the new cooler.
2. How much should i be using?
3. Do i need to use it anywhere else or just underneath the new cooler plate?
4. I had to remove thermostat and also the coolant bridge pipe ( a solid not rubber pipe) that conects to top radiator hose ( remember its a v6 veccy) Now to ensure these stay together when i refit should i use some sealant on that also ( for those that dont know the coolant bridge pipe simply slots into the thermostat housing no bolts etc)

Theres probably more but well i'll add to the thread. And will also post a piccy later to get some approval ( MARK DTM?) on my cleaning.

Just need to track down a new oil filter cannister as we had to dremel the old one off ( or the kit that allows normal oil filter to be used)  and maybe just maybe we will soon be ready to fire this beast up.....


cheers
Markie

[Markie]

the cleaning up process....note that although the mating face looks dirty its smooth, clean and flush.

More cleaning rquired or does this seem ok?

[Matchless]

I would clean the mating faces of block and cooler plate with cellulose thinners, white spirit can be a bit oily.

Apply copper grease to cooler threads.
Place the new cooler in the block with its O rings on.
Apply sealant to the groove in the cover plate, use a 3-4mm bead, make sure it is continuous, especially around bolt holes. Warm sealant tube first to make it easier to apply.
Lower cover plate on to cooler, it has to go in at an angle to clear the heads, locate over cooler threads then fit the cover bolts finger tight.
Fit cooler nuts hand tight to lift cooler into position under plate.
Torque up cover bolts.
Torque up cooler nuts.

You can use the spare oil cooler sealant on the thermostat housing but check it carefully first for cracks. You will need 2 new O rings for the thermostat bridge pipe.

Check the temp gauge connector for corrosion when you refit, the wire can become green and furry in the crimp and can fail after being disturbed.

[Markie]

I would clean the mating faces of block and cooler plate with cellulose thinners, white spirit can be a bit oily.

Apply copper grease to cooler threads.
Place the new cooler in the block with its O rings on.
Apply sealant to the groove in the cover plate, use a 3-4mm bead, make sure it is continuous, especially around bolt holes. Warm sealant tube first to make it easier to apply.
Lower cover plate on to cooler, it has to go in at an angle to clear the heads, locate over cooler threads then fit the cover bolts finger tight.
Fit cooler nuts hand tight to lift cooler into position under plate.
Torque up cover bolts.
Torque up cooler nuts.

You can use the spare oil cooler sealant on the thermostat housing but check it carefully first for cracks. You will need 2 new O rings for the thermostat bridge pipe.

Check the temp gauge connector for corrosion when you refit, the wire can become green and furry in the crimp and can fail after being disturbed.

Thanks Matchless - ran out of time to get any more done - will give another clean and need to get the o rings for housing as well.

Appreciate your help  

[Marks DTM Calib]

Looks good to go......Matchless has covered the main points.....

[Markie]

Looks good to go......Matchless has covered the main points.....

Thanks Mark   oh and it was soooo much easier doing it the way you suggested (by removing the oil cooler after undoing the nuts at the filter to give access - no bent pipes   )

[TheBoy]

Looks good to go......Matchless has covered the main points.....

Thanks Mark   oh and it was soooo much easier doing it the way you suggested (by removing the oil cooler after undoing the nuts at the filter to give access - no bent pipes   )

I suspect it is...    

[Markie]

something still niggles me on this car - i still suspect HG failure, i admit i dont know too much about oil coolers as i come from a Rover ( oil cooler free) background.

But my instinct says ( and it will continue as i am office bound all week) this is only based on the fact something has blown off coolant cap and also the bottom hose ( with jubilee still attached)

My theory in my head is that The head gasket went and over presurised the cooling system and blew out the coolant. The fact you I have mayo in the coolant would suggest that there was probably a minor leak in the gasket between the oil galleries and the water galleries at the gasket.

Am i right in saying oil pressure being higher than the coolant pressure would mean no water in the oil, only in the oil in the coolant. Then gasket failed completely and the cylinder pressure entered the cooling system, hence boom coolant all over the engine bay.

And yes i know this is a common mis diagnosis and the fact that i loosened sump plug, oil filter, checked dipstick and checked oil filler neck and get no gunk does suggest oil cooler.....oh I am going back to my work

[Marks DTM Calib]

You often get a little water in the oil, normaly in the sump, because when you turn the engine off, the coolant stays pressurised and leaks into the oil...

I suspect the pieps have blown off due to the rad being blocked and the engine over heating.....

Remember that on dry liners you very rarely get oil in the water follwing head gasket failure....

[TheBoy]

something still niggles me on this car - i still suspect HG failure, i admit i dont know too much about oil coolers as i come from a Rover ( oil cooler free) background.

But my instinct says ( and it will continue as i am office bound all week) this is only based on the fact something has blown off coolant cap and also the bottom hose ( with jubilee still attached)

My theory in my head is that The head gasket went and over presurised the cooling system and blew out the coolant. The fact you I have mayo in the coolant would suggest that there was probably a minor leak in the gasket between the oil galleries and the water galleries at the gasket.

Am i right in saying oil pressure being higher than the coolant pressure would mean no water in the oil, only in the oil in the coolant. Then gasket failed completely and the cylinder pressure entered the cooling system, hence boom coolant all over the engine bay.

And yes i know this is a common mis diagnosis and the fact that i loosened sump plug, oil filter, checked dipstick and checked oil filler neck and get no gunk does suggest oil cooler.....oh I am going back to my work

still think its the oil cooler

[Markie]

I reckon it probably is too Mark / Jamie - im just sat here at work bored, working late because i have loads to do, and cant be bothered doing it, and my mind is wandering.....and thinking " this is too easy and too good to be true   "