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[Markjay]

Sorry, just got around to check the header tank cap...

It is P/N 90 467 473, and it is actually stamped '140' which I understand to be KPa.

According to EPC, there are three types of caps:

All engines Petrol and Diesel except 2.5TD - 90 467 473

U25TD & X25TD - 90 467 694

Y25TD - 9266953

It would be interesting to hear from owners of 2.5TD what P/N is their header tank cap and if it is stamped with the pressure value.

[TheBoy]

My TD doesn't have any details other than part no....

Seen a number of Astras with 140 stamped on top.

[osealy]

mine current one runs much hotter than previous two 95-97 & 100 while towing up an incline.
Water under pressure boils at over 100c. The water pumps in these are renowned for losing their plastic vanes.

[TheBoy]

mine current one runs much hotter than previous two 95-97 & 100 while towing up an incline.
Water under pressure boils at over 100c. The water pumps in these are renowned for losing their plastic vanes.

Mine currently sits at 94 - 96, thats without pushing it too hard.

[osealy]

I haven't lost any water yet though even after hitting 100c. done about 8k in it. I would say that the viscous fan (if it works) is much quieter than my previous two TD's . The first one never got over 90c . Pain in the bollix in winter.

[TheBoy]

I haven't lost any water yet though even after hitting 100c. done about 8k in it. I would say that the viscous fan (if it works) is much quieter than my previous two TD's . The first one never got over 90c . Pain in the bollix in winter.

I seem to lose coolant out of cap when I hit 96 degrees

[osealy]

I'll check the cap & how hard the hoses are tomorrow, 450ml drive.

[tunnie]

I haven't lost any water yet though even after hitting 100c. done about 8k in it. I would say that the viscous fan (if it works) is much quieter than my previous two TD's . The first one never got over 90c . Pain in the bollix in winter.

I seem to lose coolant out of cap when I hit 96 degrees

Is that with the 'bodge' V6 coolant tank?

Maybe thats the weak link now, as the pressure builds to keep the engine cold. The cap and tank can't hold it!

If there was a blockage it should have been cleared by now, plus it should affect it even when cooler.

You put any bleach in the coolant yet, and given it a damn good thrashing?

[Markjay]

I haven't lost any water yet though even after hitting 100c. done about 8k in it. I would say that the viscous fan (if it works) is much quieter than my previous two TD's . The first one never got over 90c . Pain in the bollix in winter.

I seem to lose coolant out of cap when I hit 96 degrees

What's the Vx P/N of the cap you are currently using?

[Pitchfork]

I haven't lost any water yet though even after hitting 100c. done about 8k in it. I would say that the viscous fan (if it works) is much quieter than my previous two TD's . The first one never got over 90c . Pain in the bollix in winter.

I seem to lose coolant out of cap when I hit 96 degrees

Is that with the 'bodge' V6 coolant tank?

Maybe thats the weak link now, as the pressure builds to keep the engine cold. The cap and tank can't hold it!

If there was a blockage it should have been cleared by now, plus it should affect it even when cooler.

You put any bleach in the coolant yet, and given it a damn good thrashing?

BLEACH???

[Paul M]

I haven't lost any water yet though even after hitting 100c. done about 8k in it. I would say that the viscous fan (if it works) is much quieter than my previous two TD's . The first one never got over 90c . Pain in the bollix in winter.

I seem to lose coolant out of cap when I hit 96 degrees

Is that with the 'bodge' V6 coolant tank?

Maybe thats the weak link now, as the pressure builds to keep the engine cold. The cap and tank can't hold it!

If there was a blockage it should have been cleared by now, plus it should affect it even when cooler.

You put any bleach in the coolant yet, and given it a damn good thrashing?

BLEACH???

[TheBoy]

I haven't lost any water yet though even after hitting 100c. done about 8k in it. I would say that the viscous fan (if it works) is much quieter than my previous two TD's . The first one never got over 90c . Pain in the bollix in winter.

I seem to lose coolant out of cap when I hit 96 degrees

Is that with the 'bodge' V6 coolant tank?

Maybe thats the weak link now, as the pressure builds to keep the engine cold. The cap and tank can't hold it!

If there was a blockage it should have been cleared by now, plus it should affect it even when cooler.

You put any bleach in the coolant yet, and given it a damn good thrashing?

LOL, I won't be putting bleach in the cooling system...   ...I don't mind running it through an old knackered rad though

[osealy]

sorry 420 mls later, never went over 95 stayed mostly at 92, I suggest if yours gets too hot maybe a lot of the vanes have fallen/broken off, & the coolant isn't circulating.
Mine got up to 100c towing 19ft skiboat with 5.7 chev 200mls.

[TheBoy]

sorry 420 mls later, never went over 95 stayed mostly at 92, I suggest if yours gets too hot maybe a lot of the vanes have fallen/broken off, & the coolant isn't circulating.
Mine got up to 100c towing 19ft skiboat with 5.7 chev 200mls.

New water pump.  Old one was in tact as well...

94 seems to be lowest it will go. Ever so easy to push it to 96, don't like to see it go higher, so tend to ease off then...

[Pitchfork]

Is the fan on the Intercooler working?
Mine had seized (and blown the 20A fuse in the aux Fuse-box)
As a result when under strain, the engine had to work harder (more hot air needed than cooler) resulting in the temperature rising
As soon as the engine was allowed to work less hard the temp dropped back
Replacement Fan is £100 ish from VX, & rarely seen (if ever) in scrap yards because the Intercooler is hidden behind o/s wheel arch & goes with the remains of th ecar into the crusher
They seize because they are exposed to the elements at the end of the duct on the bumper
This could be your problem also
IW