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[Marks DTM Calib]

Made some good progress today.

I have butchered a coolant tank cap and drilled out the air admittance valve (leaving the pressure valve in place) to add a schrader valve from a wheel.

With the plenum removed and the throttle coolant pipes suitably bunged 18 psi was applied to the coolant system using the airline.

Straight away, coolant started to leak down the passenger side of the bell housing.

So dig deeper, looking closely and the coolant bridge seals are leaking......and on removal the wrong ones have been fitted, the ones on it are much to large and could never make a reliable seal!

Also noted were the cam covers, they are badly distorted due to overtightening.....but then every bolt I have had to remove has been much to tight!

Tomorrow I hope to fix the coolant leak and then see what I can do with the cam covers....maybe a slow bake at 255 degC may help!

[Markie]

werent the camcovers done recently too?  :-/

[Marks DTM Calib]

Yes, and the coolant bridge and oil cooler.....

[TheBoy]

Made some good progress today.

I have butchered a coolant tank cap and drilled out the air admittance valve (leaving the pressure valve in place) to add a schrader valve from a wheel.

With the plenum removed and the throttle coolant pipes suitably bunged 18 psi was applied to the coolant system using the airline.

Straight away, coolant started to leak down the passenger side of the bell housing.

So dig deeper, looking closely and the coolant bridge seals are leaking......and on removal the wrong ones have been fitted, the ones on it are much to large and could never make a reliable seal!

Also noted were the cam covers, they are badly distorted due to overtightening.....but then every bolt I have had to remove has been much to tight!

Tomorrow I hope to fix the coolant leak and then see what I can do with the cam covers....maybe a slow bake at 255 degC may help!

Would your made up gadget show if I have a HG or cracked head on tractor?

[razzo]

Dont suppose you have any pix Mark i would love to see them

[Marks DTM Calib]

It would show up a coolant leak......

[TheBoy]

It would show up a coolant leak......

If its pressurising due to failed HG, then obviously that may leak coolant back to cylinder is you pressure up coolant. If the head is cracked (seemingly common on BMW unit) allowing cylinder to coolant pressure build up, would that show up by pressuring coolant?

Saying that, still not 100% convinced I haven't a coolant leak somewhere - bottom of engine covered in coolant when we raised it on Sunday...

[Marks DTM Calib]

For 255degC isnt a joke.....its the temperature that PA66-GF30 softens....which is the glass loaded plastic the cam covers are made from...

I will try to take some pics tomorrow....

I have to say that the engine internals are nice and clean.

Other points to note

Windscreen arm nut cover missing
Aux coolant pump pipe support bracket (rear of plenum) missing
Wrong type of bolt fitted to inlet manifold ( I have a spare)
Engine under tray missing......this makes a big difference to engine temp!
Brake servo pipe has a tape repair where it has worn through.....
Aircon cap missing, these act as a seal so should be replaced.
Breather bridge is not fully seated into plenum and hence is leaking air......this is easy to put right.

[TheBoy]

Engine under tray missing......this makes a big difference to engine temp!

in what way - i removed diesel one as a) its knackered, b) i read on another forum removal may help with temp

[Marks DTM Calib]

I cant comment on the tractor lump but, on the V6 it helps ensure that the air through the grill and rads also passes over the engine etc and down and along the tunnel.......when the one n Matchless'es V6 was off, the temp was quite a bit higher.

[JamesV6CDX]

Mark, going off topic a tad, you have PM

[Jimbob]

Bloody hell sounds like a nightmare!

Thanks very much for this

As for the engine tray.....Its in my garage, was left off to try and help me see where the leak was, must have forgotten to put it in the boot, Shall I bring it up when I come to collect?

Cheers

[TheBoy]

I cant comment on the tractor lump but, on the V6 it helps ensure that the air through the grill and rads also passes over the engine etc and down and along the tunnel.......when the one n Matchless'es V6 was off, the temp was quite a bit higher.

Thinking about it, not sure my MV6 has an undertray....   ....never really noticed...  ....must pay more attention.

[Jimbob]

I cant comment on the tractor lump but, on the V6 it helps ensure that the air through the grill and rads also passes over the engine etc and down and along the tunnel.......when the one n Matchless'es V6 was off, the temp was quite a bit higher.

The temp has fluctuated more than normal recently, but with all its problems, put it down to that lot, Thought it was more of a splash guard than anything really!

(note to self : stop thinking! )

What are you doing about the missing parts? do you have em 'in stock', buying new, or getting off breakers?

Cheers and good luck!

[Paul M]

I have butchered a coolant tank cap and drilled out the air admittance valve (leaving the pressure valve in place) to add a schrader valve from a wheel.

Could I borrow that once you're finished with it, or could you make another and sell it to me? Sounds like a very useful contraption, and I have a slight coolant leak that I can't source (have already changed the HBV which I hoped would cure it, but hasn't).

Cheers.

PS I still have your heli-coil kit! PM me an addy to return it