Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[humbucker]

OK sounds like I need to take the pipe off completely, found the post about exhaust manifold gasket replacement so feel I know what to do to get the transfer pipe off. Is there anything else it could be. If the headgasket had gone is leaking coolant a possible consequence? Finally, Marks DTM Calib, should I do the manifold gasket at the same time. Bearing in mind it has probably been blowing for 5 years what might be the result of leaving it be, out of interest?

whats the link to the post?

[humbucker]

Interesting topic... I too have a similar problem.
I had a coolant leak, was pouring tons of water. I replaced the HBV with one off ebay - cost me £13.99 but still have a much slower leak. After a 20 mile trip if I immediately pop the bonnet I see a bunch of steam floating around behind the plenum.

There is a slight chance that I punctured the hose on the offside of the HBV during fiting (I'm a monkey when it comes to spanners and engines and stuff like that lol) but I still have not had a chance to investigate further.

I am now concerned about this 'transfer pipe' as a possible cause of the issue as my car is occasionally starting up lumpy every now and then (sorts it self out after 10-20 seconds) and makes me wonder if my dispack is getting soggy.

The guide for the HBV replacement was really useful, is there a guide for the transfer pipe? or any of the other common causes of coolant leak?

Thanks,
Ben

ben, possible common causes :

thermostat,
oil cooler,
heater bypass valve,
oil coolant bridge,
coolant transfer pipe,
split hose,
oil cooler plate unsealed

etc etc

i know as i have systematically tried them all!!

this might help your diagnosis:
http://
http://www.omegaowners.com/forum/YaBB.pl?num=1208207933

not sure how wise it is to use a heather bypass valve from ebay... geniuine vx one might be a better idea but others may tell you otherwise.  

[humbucker]

i just called vx to try and get an o ring for this coolant transfer pipe but they said without more specific info they cant work out which bit i need... i used description here which was 'stainless steel coolant transfer pipe entering oil cooler chamber at back of engine'

anyone got any more info?!? vx said so many pipes in that area not sure which one it is

[CaptainZok]

i just called vx to try and get an o ring for this coolant transfer pipe but they said without more specific info they cant work out which bit i need... i used description here which was 'stainless steel coolant transfer pipe entering oil cooler chamber at back of engine'

anyone got any more info?!? vx said so many pipes in that area not sure which one it is

Assuming the seal you're after is no 15 in the diagram, try asking for a 9128362 SEAL, RING, WATER INLET NECK TO CYLINDER HEAD

[humbucker]

i just called vx to try and get an o ring for this coolant transfer pipe but they said without more specific info they cant work out which bit i need... i used description here which was 'stainless steel coolant transfer pipe entering oil cooler chamber at back of engine'

anyone got any more info?!? vx said so many pipes in that area not sure which one it is

Assuming the seal you're after is no 15 in the diagram, try asking for a 9128362 SEAL, RING, WATER INLET NECK TO CYLINDER HEAD

thats awesome, many thanks, i'll be calling them back in the morning!  

[v6coop]

The thread I was refering to regarding the exhasut manifold gasket replacement was this one.

http://www.omegaowners.com/forum/YaBB.pl?num=1207782262/15#15

Jon

[v6coop]

Got home early yesterday so started pulled everything off in anticipation of the fine Bank Holiday weather ruling out easily working on the car Sunday or Monday. No real problems getting everything off even the exhaust manifold which was actually helped by the fact that all the nuts stayed where they were and the studs screwed out of the head! Any advice on the best way to refit the studs and what torque setting to use? Slightly more sinister was that with the manifold off it was apparent that there has been a long standing oil leak somewhere in the back corner of the head, below the manifold, which has dripped down onto the starter motor. I have felt all the way round the cam cover and cannot find a leak so assume it is either seaping out of the head gasket or from the breather box thingy just behind the head. I don't know anything about this 'box' could there be an oil leak from this and if so can it be fixed or am I looking at HG failure?

Jon

[v6coop]

At risk of talking to myself (forgive me) I thought I would update the thread with the final outcome as I had been so frustrated by others reporting the problem and not the solution.

I refitted the exhaust manifold studs with two nuts locked together. I couldn't get much torque onto them without the nuts slipping. So I decided this point was enough on the basis of not wanting to strip the thread on nuts, studs or head and that they were obviously not in very tight to start with. Manifold refitted fine but decided to take off the auxillary drive belt tensioner to ease access to the forwardmost nut.
WRT the oil leak, it was the breather box. This was absolutely caked with oil deposits and both the hoses were blocked, so after a long soak in petrol, all cleaned up and hoses cleared I refitted it using the grey sealant that is applied using a (silicon sealant type) sealing gun. I also refitted the transfer tube with a new sealing ring and the coolant bridge with new sealing washers and a smaer of the above mentioned sealent on all the metal surfaces (ie head, bridge and banjo bolts) before fitting the washers between.
So far so good. The start up exhaust manifold ticking is gone which is so much better than waking the neighbours every time it was started from cold. Most importantly though there is no sign of a water leak! I have had to top the expansion tank up but assume this was air trapped in the system. Fingers crossed I now have a V6 lump which is no longer speing fluids and breathing properley again. Thanks for the initial advice which encouraged me to have a go.

J

[humbucker]

At risk of talking to myself (forgive me) I thought I would update the thread with the final outcome as I had been so frustrated by others reporting the problem and not the solution.

I refitted the exhaust manifold studs with two nuts locked together. I couldn't get much torque onto them without the nuts slipping. So I decided this point was enough on the basis of not wanting to strip the thread on nuts, studs or head and that they were obviously not in very tight to start with. Manifold refitted fine but decided to take off the auxillary drive belt tensioner to ease access to the forwardmost nut.
WRT the oil leak, it was the breather box. This was absolutely caked with oil deposits and both the hoses were blocked, so after a long soak in petrol, all cleaned up and hoses cleared I refitted it using the grey sealant that is applied using a (silicon sealant type) sealing gun. I also refitted the transfer tube with a new sealing ring and the coolant bridge with new sealing washers and a smaer of the above mentioned sealent on all the metal surfaces (ie head, bridge and banjo bolts) before fitting the washers between.
So far so good. The start up exhaust manifold ticking is gone which is so much better than waking the neighbours every time it was started from cold. Most importantly though there is no sign of a water leak! I have had to top the expansion tank up but assume this was air trapped in the system. Fingers crossed I now have a V6 lump which is no longer speing fluids and breathing properley again. Thanks for the initial advice which encouraged me to have a go.

J

good work, keep us informed of progress and how you get on in the coming days. great to hear you got it sorted. my drip isn't proving as easy to isolate, but fingers crossed...

[Albus Dumbledore]

good work, keep us informed of progress and how you get on in the coming days. great to hear you got it sorted. my drip isn't proving as easy to isolate, but fingers crossed...

I am not familiar with this engine, but doesn't a failed coolant pump cause leakage?