Isuzu Trooper Owners Club UK™

willowkevin · *** Joined: 18 Mar 2004 Posts: 195 Location: york

hi all , bit of a query on the 2.8 cooling system , the frontera i put the engine in has an expansion bottle ive piped up to the radiator , but .. im getting a leak from the radiator cap , is this because ive raised the head of water ? the trooper had a smaller bottle from the rad neck fed by a smaller pipe at the same top height as the rad filler , but the fronty bottle is set higher and the fronty rad didnt have a filler on it ? this leak im having is bugging me , but as its home spun im puzzled as to the cause ?
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isuzu powered frontera 2.8 td hybrid

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brains · ****** Joined: 18 Aug 2006 Posts: 897

ether im confused or its late but can you send a pic of the engine bay so we can see what youve done.

willowkevin · *** Joined: 18 Mar 2004 Posts: 195 Location: york

the camera's died mate !my lad borrowed it before xmas for a trip to old trafford and its not worked since ! but after reading my own post i think ive answered my self ! its leaking because ive used the wrong expansion bottle and ive raised the head of water too much ! (i think Confused

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isuzu powered frontera 2.8 td hybrid

brains · ****** Joined: 18 Aug 2006 Posts: 897

give ti a go then m8 , its dificult to help as the engine is in a frontera but if you are able to get another on just update your pictures and if you do get a problem we can help more. Very Happy

wisecobandit · **** Joined: 11 Jan 2007 Posts: 337 Location: Exeter

So your saying your expansion bottle is higher than the radiator cap?
It certainly wont help but then your cap should be water tight and only release steam under pressure.
It may just need a new rad cap as it may have a didgy sealing washer?
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jonkem · Posted: Wed Jan 31, 2007 23:45 Post subject:

I used a 2.3 Fronty rad which doesn't have a filler & it works perfectly with the 2.0 expansion bottle like you have.
My 3.1 has a 2.8 Trooper rad with a 3.1 side expansion bottle and that also works perfectly, so probably the cap is at fault.
Having said that, the expansion pipe from below your rad cap should be constantly emersed in the expansion ressevoir.
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1994 KZJ70 Cruiser (currently filling the garage and causing some head scratching)
1988 MKI 3.1td Hybrid Van (Ex Bobtail)
1991 SWB Fronty 2.8td Hybrid
2000 Astra Estate (work)
2006 VXR Astra
MK1 SR Nova