Thread: Blown expansion tank again

Originally Posted by sclarke

Hey i have stacks of them...
Thats a great idea...

The Volvo 240 one is also white and semi transparent.. it pancake design and about 3" high with a bottom hose and top breather.....

The 1st pic has a Volvo 740 and 940 Expansion tank... the rounder one


Last pic is one from a 240 series volvo, lower profile flat tank... every wrecker in the world has a old 240 laying around.....
in all the years i have had volvo's i have only blown one tank... and that was due to a blown head gasket...

Clarkie, I just had a look at pick-a-part and picked up a volvo one as in the bottom pic, the pressure cap is only 75 kpa about 10 lb, I grabbed one of a SAAB, that was 110 KPa, that's just under 16 lb, I know your the Volvo guru, so do they come in 15 lb also? Going to fabricate a bracket and if it works it's only cost me $13 instead of the $120 odd for LR.

cheers,
Rovernaut

I didn't want to spend $120 on a LR tank so took some forum advise and wentr to the wreckers and picked up this $13 Volvo tank.
I also scored a SAAB pressure cap.
With a little modification to the bracket here's the end result.







Thanks to Brian Hjelm and S Clarke for the Ideas

I remember an article from approx 6 years ago where we found that there were four different types of expansion tank available as spares.
The best one was the 'natural' semi-transparent plastic type.
Original Black plastic was rubbish.
Opaque white was rubbish.
Can't remember the third.
Best was given above.

Get an O2 check done on your system to confirm a leaking head gasket. I think it's a fool proof method when deliberating the subject.
Fitting a new cap is also a good way to ensure built up presure can reliably escape.

15lb caps on Ovlov's, not to my knowledge.....

Now that ive seen your mod i'm going to do exactly the same in the county.....

That is neat and being part of the Ford Stable, it suits...

Originally Posted by sclarke

15lb caps on Ovlov's, not to my knowledge.....

Now that ive seen your mod i'm going to do exactly the same in the county.....

That is neat and being part of the Ford Stable, it suits...

And they're cheap and compact enough to carry as a spare. Since they have the same diameter hose outlets as LR, one could carry a spare and use an occy srap or 2 in an emergency to get one out of trouble. They should last, they seem to out last all those Volvos produced.

Is the volume (capacity) between the Volvo and LR product the same? This would need to be considered if it wasn't; wouldn't it?

the header tank failed on the defer last night it was an old black one. bottom hose looked a bit tatty so i got one of those too 400 bucks later im on the road again what a real peice of crap these tanks are

Is the volume (capacity) between the Volvo and LR product the same? This would need to be considered if it wasn't; wouldn't it?

Maybe someone who has changed them could do a 'pour test'.

Best to know this before we all take off to the nearest "Dismantlers".

The LR one in my Disc. looks a bit bigger especially on the firewall end, but it's hard to tell by looking at them due to the odd shape.