It's a 12mm hex fitting. I resealed it without removing the exhaust manifold. cut away the webbing on the manifold, cut down an Allen key to fit and removed, resealed and refitted the plug.
HTH
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It's a 12mm hex fitting. I resealed it without removing the exhaust manifold. cut away the webbing on the manifold, cut down an Allen key to fit and removed, resealed and refitted the plug.
HTH
ok. so my cooling system is overpressurised. as advised i looked and inspected the oil cooler tube and all looked fine and dry. I did notice some dried coolant that I think may be associated with my issue, i also noticed a warped what i think to be exhaust manifold gasket right where my dried coolant is.
Also some facts, td5, 2002 210k, no HG done, always ran proper coolant, never been above the horizontal part on the temp gauge though it does get ricisulously hot in there, after 10mins/7k's I burnt myself on the hook next to the acoustic cover front left bolt. Had water pump issues which were rectified not too long ago and everything was fine for a a few months. No sign of milkshake in the oil and i dont lose as much oil now that ive changed the turbo to sump drain pipe gasket. attached are pics.
May I suggest remove the small hose from the oil cooler, and inspect the spigot on the cooler the hose fits on. Quite often after time this spigot can develop pin holes. Also, squeeze the hose, it looks a bit " bulgy" to me, is it soft? If you remove the hose, to make it easier, there is a 10 mm bolt holding the steel pipe onto the back of the engine, remove it to give you some " give". BobQuote:
Originally Posted by trevor
I don't believe that there are any coolant galleries in the exhaust manifold.Quote:
Originally Posted by dearot
To get to the plug, which is between cylinders 3 & 4, you need to take off the manifold and manifold gasket. Before that, you need ot remove the turbo. you've also got to remove the a/c pump in order to get to one of the nuts on the exhaust manifold. The plug apparently has an o-ring. Mine, at 185k, had totally disintegrated to a small mass of gunk that had to be dug out.
I've pulled out the plug, cleaned it up and put on a new o-ring as part of some preventative maintenance, and replaced the water pump, gaskets on the oil cooler, hose on the oil cooler, gasket on the PS pump, warped manifold and so on.
This what I get on D2 (attached). I dont know where the traces of coolant came from. Any idea?Quote:
Originally Posted by Pinelli
If the water jacket plug had leaked a reasonable amount it could have dribbled backwards and down to end up where you have those traces.Quote:
Originally Posted by dearot
Maybe?
It's a tricky spot to take photos. I just posted in another "Coolant problems" thread in this section. The photo in my post shows where it has tended to run in my case. YMMV.
If the water jacket plug leak, will it cause overpressurized on the cooling system?Quote:
Originally Posted by bell1975
attached another photo from bottom of the exhaust manifold. water jacket plug leaking confirm???
I'm unsure. Perhaps someone will be along later in the day with some additional wisdom.Quote:
Originally Posted by dearot
In the attached photo there are 2 small weeps of pink OAT coolant at the hose terminations. If you have similar leaks at these points that may have led to the coolant trickling underneath the manifold from those points.Quote:
Originally Posted by dearot
I dont have from the big hose but I do have from the small hose. It looks not much traces on the small hose that why I was wondering whether water jaket leak can cause overpresure on the cooling system in this case the top radiator hose as they are the highest hose.Quote:
Originally Posted by bell1975
No it wont cause the system to "over pressurise" by leaking however if that leak causes substantial coolant loss and overheating then gasket and possible head damage will result.Quote:
Originally Posted by dearot
Too much pressure is 99% a failing head gasket. With results ranging from still driveable to stopped dead.
Leaking from the head plug will usually leak under the exhaust manifold and can run back to the rear of the motor and cause a shudder in the clutch also.
Yours seems to have leaks at both hoses and would be the first point to fix for coolant leaks. It is possible for your head pluf to be leaking also but its reasonably clear that the OAT has stained most of the exhaust runners in front of the plug also.
I have found some TD5 top hoses delaminate and leak/ wick along the reinforcement fibres.
Check out the Good Oil for TD5 head gasket threads and you will find tonnes more info.
cheers