TD42 Overheating

Post by **ozy1** » Tue Sep 30, 2003 6:29 pm

GQ TD42, has 2 inch body lift,

could the fact that the radiator is still in the standard pos casue overheating probs, i think ive read somewhere it does, but cant seem to find it.

thanks,

Shawn

Post by **bigbluemav** » Tue Sep 30, 2003 7:58 pm

Oz

I'll email you a drawing that I got off another forum (Patrol4wd I think)

Its a bit of sheet metal to stop air going under radiator and cooling the fan viscous clutch. Simple but should be effective.

I've got a 2" body lift on mine and haven't got around to doing it yet, I've got some sheet but that's it so far!! As usual!!

Regards

Post by **Area54** » Tue Sep 30, 2003 8:03 pm

Hey Oz, I've got some tech for you on this. Do you have the DX model with the orange dash lights, what year is yours? You need to change your radiator - the ones in this model are too small. PM Big_Nissan here ---> http://www.outerlimits4x4.com/PHP_Modul ... ile&u=1572 and ask him about the trials he went through with his truck.

Putting a metal cowling to direct air won't help much. The viscous fan was frozen solid, vehicle still got hot. He spent a lot o' money on flushes, then more flushes, new viscous fan - still got hot. Rig had no body lift or large spotlights to inhibit air flow.

Post by **ozy1** » Tue Sep 30, 2003 8:28 pm

its actualy for a mates, mate, i was told about this today, and though id ask the see if people know about it.

thanks for the help so far

Post by **big_nissan** » Tue Sep 30, 2003 8:48 pm

Yeah OZ,Area 54 is right,always had problems with engine getting warm. I thought a decent flush would do the trick but no good.Even after replacing fan coupling this made little difference.
It wasn't until i spoke with a local radiator shop that they told me after doing all these things that a larger radiator would be benifical.I ended up going from the standard 2 core to a large 3 core and since then have had no overheating problems,highway driving or low range work, even on a hot summer day.
I have also heard that a larger flow water pump is available but it's effectiveness is questionable as it does not aid in the cooling process. :lol:

Post by **ozy1** » Tue Sep 30, 2003 8:50 pm

are all patrol radiators 2 core, or just some?

Post by **big_nissan** » Tue Sep 30, 2003 9:21 pm

I'm not too sure on that. Could be different between prtrol and diesel.

Post by **bogged** » Wed Oct 01, 2003 4:30 pm

ozy1 wrote:are all patrol radiators 2 core, or just some?

My diesel had 2 core std, now has 3 core.

I replaced everything from the radiator to the temp guage on the dash...
Had radiator flushed,
Radiator hoses,
(3 i think)caps,
thermostats(2 i think),
clutchfan,
temp guage sender on the block,
multiple different coolants and flushes etc..

Nothing really worked..

Still now the clutch fan runs all the time, since it was rebuilt by Berrima :roll:

.

Post by **V8Patrol** » Thu Oct 02, 2003 10:11 am

I know its a diff model and slightly off topic but.... all 3 of my MQ's run 3 core as standard as do all other MQ's I have seen.

Not really relevent but, I had an overheating problem 2 years ago and was very close to fitting a 4 core when the problem was found. I hand built a fan shroud that fixed the problem instantly and have since made 4 more for other mates that had the same prob once the V8 conversion was done.

"AndrewT" (forum member) has a GQ and he fitted twin thermos from a falcon I think, he also made a specialised shroud from 3mm alloy and so far it appears to be working fine. He does not run an off engine fan at all now.

Post by **Area54** » Thu Oct 02, 2003 10:40 am

ozy1 wrote:are all patrol radiators 2 core, or just some?

There must be difference, I have a diesel Maverick wagon '92 with electric windows, I think it's equivalent to the ST Patrol (although I don't have electric mirrors). I've never had a cooling problem, I have a 50mm body lift, naturally asthmatic, factory winchbar (ARB made) small 7" spotties and nothing to radically improve the cooling efficiency.

Next time I get it out the garage I'll have a look.

Post by **bogged** » Thu Oct 02, 2003 10:58 am

V8Patrol wrote:
"AndrewT" (forum member) has a GQ and he fitted twin thermos from a falcon I think, he also made a specialised shroud from 3mm alloy and so far it appears to be working fine. He does not run an off engine fan at all now.

Thats a common mod, and yea seems to work fine, although Ive heard that they suffer from mud and die fairly quick?? Maybe andrew can fill in the blanks??

Has anyone dealt with those 'super cooling' desert racer ones, they are LOTS $$ but are another option

Post by **Robbo** » Thu Oct 02, 2003 11:07 pm

Have 2 mates with same problem, 1 is a 4.2T GU that started heating up after Berrimer juiced up the injector pump & the owner started using a fuel additive. The other a 4.2 natural GQ that needed bonnett vents for escaping hot air to solve the problem. Me I got a petrol no probs.

Post by **Singo17** » Thu Oct 02, 2003 11:27 pm

Um I might be way off track here but what about gunk in between the cores.

Just a thought from what we need to do at work on the radiators out of leopards. You can jet spray them but it doesn't actually get all the shit out of em. As the spray cannot get all angle behind the fins. We find also dunk em in mud once and thats it they overheat no matter what you do to the radiator take it out clean etc.

The only way we have fixed this is via a gas jet treatment that basically burns and blows the shyt out.

Just another consideration.

Post by **bogged** » Fri Oct 03, 2003 10:02 am

Singo17 wrote:Um I might be way off track here but what about gunk in between the cores.

Just a thought from what we need to do at work on the radiators out of leopards. You can jet spray them but it doesn't actually get all the shit out of em. As the spray cannot get all angle behind the fins. We find also dunk em in mud once and thats it they overheat no matter what you do to the radiator take it out clean etc.

The only way we have fixed this is via a gas jet treatment that basically burns and blows the shyt out.

Just another consideration.

yea good point for GQ users anyway, hosing them out only gets 1/2 of the area. When I removed mine to hose it out, you can see the area missed by hosing out.

Post by **John H** » Sat Oct 04, 2003 12:17 pm

My 4.2 Diesel Mav had some hot running problems once I fitted it with a turbo. Under high load (long hills at highway speeds) the temp gauge used to cilmb up to 3/4 or a little more. I have a 3-inch bodylift and to start with I made my own shroud to make the fan more effective. Next I put more fluid in the fan clutch so that it would bind up sooner. All of this helped a little but it would still run hot.
The total and permanent fix was a new radiator. I took the stock two core unit to my local radiator shop and he made up a three core unit to suit. Since then I have removed the excess fluid from the an cluch and it still runs cool. It sits at just under 1/4 and under sustained high load it may creep up to half — no more problems.
The three core radiator set me back around $550 and was a good investment for peice of mind.

Post by **bogged** » Sat Oct 04, 2003 2:24 pm

John H wrote:My 4.2 Diesel Mav had some hot running problems once I fitted it with a turbo. Under high load (long hills at highway speeds) the temp gauge used to cilmb up to 3/4 or a little more..

Regular occurance with TD42s when ya put a turbo on

Post by **John H** » Sun Oct 05, 2003 7:42 am

bogged wrote:
John H wrote:My 4.2 Diesel Mav had some hot running problems once I fitted it with a turbo. Under high load (long hills at highway speeds) the temp gauge used to cilmb up to 3/4 or a little more..

Regular occurance with TD42s when ya put a turbo on

Yep, I am aware that in my case the addition of a snail created the overheating problems.
My point was that a decent three core radiator fixed the problem and didn't cost that much. If a few people with non-turbo 4.2D's are also having this problem with heat, maybe a better radiator should be considered as a worthwhile upgrade.

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