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[Jonesie]

When i 1st picked up the car i took her for a spin and it flashed up coolant level, so i topped it up and thought no more about it, went out later and it flased up again, checks the expansion tank and water is gone, so refills again and had a gander underneath the engine, sure enough its got a leak from the back. I know what your first thoughts are, they're the same as mine was, i pulled the scuttle out and checked the HBV, nope bone dry. I then put the tank cap back on and the leak stopped. So this leads me to believe that its leaking from the water inlet pipe, how much of a pain in the ass am i looking at?

[deviator]

Putting the cap back on seals the system again, therefore the flow stops.

Check the banjo bolts on the coolant bridge between the two heads, common fault.

[Jonesie]

Putting the cap back on seals the system again, therefore the flow stops.

Check the banjo bolts on the coolant bridge between the two heads, common fault.

I found it earlier thanks to my mate blowing his ciggy smoke into the expansion tank then preasurising the system with his mouth and looking out for the smoke, sure enough out it popped on the bridge  At least it isnt where i thought it was 

[sneakypenguin]

Putting the cap back on seals the system again, therefore the flow stops.

Check the banjo bolts on the coolant bridge between the two heads, common fault.

I found it earlier thanks to my mate blowing his ciggy smoke into the expansion tank then preasurising the system with his mouth and looking out for the smoke, sure enough out it popped on the bridge  At least it isnt where i thought it was 

Lmao, thats one way to check

[deviator]

I have never thought of that, but I like the idea and might have to use it. (May even try and pass it off as my idea!   )

[Jonesie]

well took the pelum off today, turns out the leak isnt coming from the bridge, it seems to be coming from the pipe with the arrow (pinched photo from another thread ) Has anybody had any problems with this little sod? any help appreciated

[Entwood]

If I'm not mistaken .... thats the pipe that goes to the thermostat, it connects by a push fit section with 2 o-rings and is held by the "bastard bolt" from t'other side.

I'm thinking you may have to remove the thermostat and check all the connections/o-rings ..

[Jonesie]

that sounds like fun. Dont suppose we have a guide knocking around?

[Entwood]

that sounds like fun. Dont suppose we have a guide knocking around?

http://www.omegaowners.com/forum/YaBB.pl?num=1229464812

[Jonesie]

Now for my final question Does anyone know where i can find the units part number that fits my s plate 2.5 v6?

[Entwood]

Now for my final question Does anyone know where i can find the units part number that fits my s plate 2.5 v6?

depends on which "parts" you want ...  :-/ :-/

Thermostat gasket ??

Link pipe o-rings ??

Thermostat itself

with any luck one of the experts will pass by soon and offer better advice than I can give ....  I was unhappy about the "bastard bolt" so got Loo-Knee and Pete to change my thermostat for me ... and I'm very glad I did .......   

[deviator]

Yep thats the thermostat housing.

You will need to remove the cambelt and back pan to get the thermostat and pipe out.

Stick a new thermostat in it for the cost whilst you are there (maybe a cooler running one) stick a new o-ring/seal on the end of the pipe. Maybe worth doing a cambelt and water pump change, depending on when it was last done. Give the oil cooler a visual inspection whilst you are there, just to make sure the 2 bolts on the top cover are ok, IE not leaking. The oil cooler is under the inlet divider (the black bit you have stick tissues in).

With regards to the 'bastard bolt', I presume you are talking about the bolt on the right hand side of the head, IE the other end of the pipe. Yes its a git. The best piece of advise I can give you, is as I've said I am pretty certin you need to remove cambelt/back pan, once removed you can geta 10mm spanner in there from the front of the engine. Its a pain as you can only get 1/4 or even 1/8 a turn and then you end up having to remove then turn the spanner over to go again. You can get it from the bottom IIRC, but the last time I did it that way it was 1/8 a turn, turn spanner over, 1/8 a turn then climb out and do 1/8 a turn from the top - then back under for another 2 x 1/8 a turn. Its not fun.

Hope that helps.

[Entwood]

Yep thats the thermostat housing.

You will need to remove the cambelt and back pan to get the thermostat and pipe out.

Stick a new thermostat in it for the cost whilst you are there (maybe a cooler running one) stick a new o-ring/seal on the end of the pipe. Maybe worth doing a cambelt and water pump change, depending on when it was last done. Give the oil cooler a visual inspection whilst you are there, just to make sure the 2 bolts on the top cover are ok, IE not leaking. The oil cooler is under the inlet divider (the black bit you have stick tissues in).

Hope that helps.

Loo-knee and Pete certainly didn't do that !!

[deviator]

It's a real struggle to get enough clearance for the thermostat.

I wonder if you could spin the thermostat in the housing to drop it and then once removed you might be able to turn the pipe over to change the seal. You may be able to, but the only time I have done thermostats on the the v6's I have removed the cambelt & backpan. Certainly makes the 'b'stard bolt' easier.

[Jonesie]

Well i've set too today, picking up a new stat today when they get it in. I've managed to get the bastard bolt out (FYI very very easy with a 10mm pivit head ratchet spanner, took 2mins!) But now im struggling to seperate the link pipe and stat housing, any tips?