Isuzu Trooper Owners Club UK™

:::Matski::: · Posted: Mon Apr 28, 2008 9:20 Post subject: Hot Mk1 3.1

Right brief description.

Mk1 3.1, FMIC, pump wound up, big bore strait through exhaust, new 30% better cooling three bar rad and all pipework clear and pristine.

The truck has always got hotish (two thirds on the gauge) since the 3.1 swap when towing. After the FMIC install and pump tweaks it is going up to over three quarters on the gauge on motorway hills when towing (2 ton)

Now I appreciate the extra power and FMIC in the way are responsible for the recent hike, but I think it has always run a bit hot.

Any ideas how to give extra cooling on the motorway? Do fans help at 60 odd mph? Scoop do anything? Two rads has been suggested..... Holes drilled in the T-Stat has also been suggested.....

Any ideas?
_________________
Front Aussie Locker - Rear LSD - Petrol Diffs
2" Lift - 1" Body lift - +2" shocks - 32" KL71s
2.5" free flow stainless system - TMIC - 20psi Boost
Suckin' Diesel Baby!

Google · Sponsor

shrekky · ** Joined: 27 Feb 2008 Posts: 52 Location: sunderland

i dare say the tweaks and FMIC will be responsible for a little increase in temp rise,as you're burning more fuel with denser air(ie bigger bang)......................and i dont know about these trucks but i had to fit fans to my citreon xantia that was a bit like your truck ,in that it seemed to run hot anyway Rolling Eyes

and especially when towing,and yes they did seem to work at 60mph ish...................people seem to forget the oil not only lubricates and engine,it helps cool it to,especially one fitted with a turbo.................if you're towing quite often,why not fit an oil cooler ?
_________________
'92 2.8TD SWB TROOPER.............SOLD
'86 MERCEDES 190D

:::Matski::: · Posted: Mon Apr 28, 2008 9:35 Post subject:

They have an oil cooler as standard (water cooled part of the filter housing) A biger air cooled one round the front would help I guess but I have no room for it...
_________________
Front Aussie Locker - Rear LSD - Petrol Diffs
2" Lift - 1" Body lift - +2" shocks - 32" KL71s
2.5" free flow stainless system - TMIC - 20psi Boost
Suckin' Diesel Baby!

DYLAN · Posted: Mon Apr 28, 2008 9:54 Post subject:

I don't suppose something stupid like taking the thermostat out altogether would help?
_________________

2002 S-TYPE JAGUAR 3.0 SPORT

:::Matski::: · Posted: Mon Apr 28, 2008 10:04 Post subject:

I am going to try that just to see if it is faulty. But surly it's not wise to run without one long term?

On the subject of fans, do we think a fan does anything at 60mph? My thinking is that it would have to create over 60mph of wind or it will be getting in the way....
_________________
Front Aussie Locker - Rear LSD - Petrol Diffs
2" Lift - 1" Body lift - +2" shocks - 32" KL71s
2.5" free flow stainless system - TMIC - 20psi Boost
Suckin' Diesel Baby!

DYLAN · Posted: Mon Apr 28, 2008 10:27 Post subject:

dxmedia · Posted: Mon Apr 28, 2008 10:39 Post subject:

I'd go for removing the stat - all it will do is lengthen the warm up time due to water circulating round the whole engine rather than just the main circuit.

I think that idea of an oil cooler is a good one though Matt, is there room behind the rad for one - it doesn't 'need' to be in direct air flow to have an effect, just the surface area of the rad will lower the temp considerably - What about fitting on the inner wing across from the oil filter?

Have a look on a Paj in a scrappers, they have seperate ones fitted Wink

_________________
For great insurance deals on 4x4s, imports and more, contact Adrian Flux :

01553 845 945

:::Matski::: · Posted: Mon Apr 28, 2008 10:57 Post subject:

Hmm the oil cooler thing sounds good.

The stat was new when I fitted the 3.1 as was the rad/pipes and have always had coolent in.
_________________
Front Aussie Locker - Rear LSD - Petrol Diffs
2" Lift - 1" Body lift - +2" shocks - 32" KL71s
2.5" free flow stainless system - TMIC - 20psi Boost
Suckin' Diesel Baby!

dxmedia · Posted: Mon Apr 28, 2008 11:23 Post subject:

What about an oil cooler on the innerwing with a fan blowing on to it? Could be wired in exactly the same was as a leccy fan conversion, just rather than cooling water, it's on an oil rad?
_________________
For great insurance deals on 4x4s, imports and more, contact Adrian Flux :

01553 845 945

Philp · Posted: Mon Apr 28, 2008 14:01 Post subject:

I'd consider an electric fan conversion for twin fans, will certainly help when towing uphill, you could always fit an oil cooler and duct air to it maybe from the front bumper, these guys http://www.merlinmotorsport.co.uk/AIR-DUCTING-Air-Intake-Ducts/c18_291/index.html have all sorts of ducts, scoops and hose, fit an inline fan to force air through at lower speeds. You could also try wrapping some exhaust wrap around the exhasuts/turbo manifold to reduce underbonnet temps (and help scavenging too) you can even get the manifold ceramic coated that does the same thing. Another option would be to get some louvres punched in the bonnet to let the hot air out or ven fit one of the Kenlowe bonnet extractor fans. If you have a bonnet from one with a top mount i/c then can you turn the scoop backwards so the low pressure sucks the hot air out?
_________________
Phil

96 or is it a 98 Isuzu Bighorn Lotus

dxmedia · Posted: Mon Apr 28, 2008 14:09 Post subject:

:::Matski::: · Posted: Mon Apr 28, 2008 14:10 Post subject:

So you think a fan works at 60mph then? This is where I am not sure, I mean it needs to be sucking air at over 60mph or its getting in the way...

Reverse scoop eh, something to think about.

Good ideas, keep em coming Very Happy

_________________
Front Aussie Locker - Rear LSD - Petrol Diffs
2" Lift - 1" Body lift - +2" shocks - 32" KL71s
2.5" free flow stainless system - TMIC - 20psi Boost
Suckin' Diesel Baby!

dxmedia · Posted: Mon Apr 28, 2008 14:12 Post subject:

Fix that water leak, and run on 100% antifreeze / coolant - that will have a marked effect, water is actualy very very poor at conducting (yes electricity as well Wink

), so replace water with something which is good....
_________________
For great insurance deals on 4x4s, imports and more, contact Adrian Flux :

01553 845 945

rangielover · **** Joined: 17 Jul 2006 Posts: 276 Location: West wales

i had a 2.8 years ago with a stuck thermostat, shut closed causing her to run a little warm

check the thermostat gasket too, it was boiling out of the seal and running low on water

dxmedia · Posted: Mon Apr 28, 2008 14:23 Post subject:

Good point - if it's leaking any water the system isn't going to pressurise correctly and the water will be boiling at 100 rather than 120 or so for a propper system.
_________________
For great insurance deals on 4x4s, imports and more, contact Adrian Flux :

01553 845 945