Patrol radiator

Submitted: Friday, Jan 16, 2004 at 17:41
ThreadID: 9795 Views:3713 Replies:7 FollowUps:8
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I've been reading, posting follow-ups etc over the last few days with regard to the troubles a lot of us seem to be having with our Patrol 4.2T/Ds overheating and I reckon I've found the solution. There is a company in Qld called PWR radiators (look up : www.pwr.com.au) and they specialise in making custom radiators. I just phoned the bloke there on 07 5598 1499 and he said they've been selling quite a few to Patrol owners. The secret is that they make the whole radiator out of alloy with 20mm tubes instead of the standard 10mm tubes. They're a straight bolt in job and have the threads in the base to take the 2 switches as per OE. The catch? They cost $1,100+. I still want to do my viscous fan changeover first, but I reckon if that doesn't fix it, then this will be my last option. Anybody got any other bright ideas?
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Reply By: Member - Peter (York) - Friday, Jan 16, 2004 at 18:17

Friday, Jan 16, 2004 at 18:17
I have had the same problem my local mechanic has just used high pressure water to blast out the bugs and dirt from the radiator , I was amazed at just how much was in there I have already noticed that it takes that little bit longer to reach working temp so for a few minutes work and no cost it has helped already ,the other thing I am doing is to remove the plastic shield that bolts behind and at the bottom of the Nissian alloy bull bar and fitting a metal strip that will direct the air up to the radiator as the bull bar has vent holes already cut into it this strip can be bolted to the existing holes from the plastic shield.
Do you have any details re the fan change over as I had not heard of this before thanks 99 GU Patrol 4.2 TD
Peter York 4x4
AnswerID: 43256

Follow Up By: Member - Tim&jan - Friday, Jan 16, 2004 at 18:50

Friday, Jan 16, 2004 at 18:50
mine is the same set up as yours ive never had any problems with heat even in soft boggy beach work at 38c out side tempgu bush basha
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FollowupID: 305566

Follow Up By: Roachie - Friday, Jan 16, 2004 at 23:36

Friday, Jan 16, 2004 at 23:36
Peter, there has been a lot of recent postings about the 4.2T/D overheating and nobody has posted a sure fire fix to date. The matter has been discussed at some length, but I suggest you read Posts # 9668 & 9700 to give you an idea of what's been discussed before. Basically, it seems to be agreed by most owners who've spent some time on this problem that the answer lies either in the radiator itself or the viscous fan. Some have said they've tried aftermarket fans which have not worked. Others have said the genuine Nissan fan is the way to go. I got a price from local dealer today; $387- (+ labour etc if you need it fitted). The radiator I spoke about above, is the way I was going to go using my own local radiator bloke here in country SA (Kadina/Moonta). However, he has never made up a new radiator from scratch for a 4.2 Patrol before and was going to do it in brass with 3 cores. The bloke at PWR seemed to understand my problem when I phoned him. He said the problem is well known to them and they've spent a considerable amount of time developing this fix. If you look up their web site you'll see that they specialise in high performance radiators, intercoolers etc. The vehicle featured in 4WD Monthly that I mentioned certainly seemed to be very well sorted out (for competition by the looks of it). So I imagine that if the new alloy radiator works well under those trying conditions, it should work as well for a touring hack like mine which would be operating more in line with how a diesel was destined to be used. If anybody reading this has used one of these alloy replacements in their truck, it would be nice to hear from you.
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FollowupID: 305592

Follow Up By: Davoe - Saturday, Jan 17, 2004 at 00:44

Saturday, Jan 17, 2004 at 00:44
One of the Magazines did a test on the 4.8 4.2td and 3.0td and noted the increase in temp on the 4.2td while sand driving and this is in a new vehicle. They commented that it was a smaller radiator than in the 3.0. As a previos post of mine suggested dont believe all you read but perhaps there on to something and the 4.2 is simply underradiated and may benifit from a 3.0td radiator if it will fit (probably not cheap either)
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FollowupID: 305600

Reply By: Truckster (Vic) - Friday, Jan 16, 2004 at 21:27

Friday, Jan 16, 2004 at 21:27
The only way to clean the Patrol radiator fins is to remove it, the cowl, and body cover over 1/3rd of it, you cannot hose it out.

$1100?? Dreaming.

Although Andew Williams just made his own Alloy radiator, and swears by it. Considering a 3core is $450, I'd be going the 3 core again...

Other options, install a VDO Temp guage.
AnswerID: 43277

Reply By: Eric Experience. - Friday, Jan 16, 2004 at 22:29

Friday, Jan 16, 2004 at 22:29
Roachie.
The capacity of a radiator is proportional to the no of tubes, if you have larger tubes you probably have less of them, so if you do a tube count and find less don't buy it. Air flow is the problem, remember the air has to get out of the engine compartment as fast as it comes into the radiator so getting more air in must be good but if it has no where to go you are going to over heat. as an experiment remove the plastic panel from the inner guards to the chassis and notice the temp drop. the patrols used in competition have the complete inner guards removed, this not legal on road. Remember the older models had louvers in the bonnets. Eric.
AnswerID: 43290

Follow Up By: Member - Peter (York) - Saturday, Jan 17, 2004 at 10:44

Saturday, Jan 17, 2004 at 10:44
My biggest problem is living in inland WA ,in summer we often get temps over 40dec ,the other day it was 47dec so if towing and using the aircon it dosnt take long to get hot .I wonder if the missus would mind shifting to the coast ?I will tell her its to save buying a new radiator (plus I could get some more fishing in so our food bill would be less) LOL99 GU Patrol 4.2 TD
Peter York 4x4
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FollowupID: 305634

Reply By: goldfinder - Saturday, Jan 17, 2004 at 12:05

Saturday, Jan 17, 2004 at 12:05
I posted my problems regarding GU 4.2TD overheating while towing a van in high ambient temps a while back.I just spoke to PWR and will be ordering a new Rad from them on Monday. Once installed I'll keep everyone posted on the outcome including ease of installation. As far as an improvement in temp control goes I'll have to wait and see on my next trip to somewhere hot. Probably around early May. Going to Stockton Beach in a couple of weeks which should give it a bit of a test climbing dunes if it's a hot day.
AnswerID: 43329

Reply By: Eric Experience. - Saturday, Jan 17, 2004 at 22:06

Saturday, Jan 17, 2004 at 22:06
Roachie.
Clearly you need a a much bigger cooling capacity, with the ute you have the flexability to add another radiator under the tray. I have seen this done by rerunning the heater hoses to a second radiator under the back of a vehicle, the water circulates slower than the main radiator because of the smaller hoses but the water comes back relatively cool so the whole thing works a treat. A little air scoop at the front of the tray frame with a duct running down beside the rear window would give you heaps of air. Eric.
AnswerID: 43384

Follow Up By: Roachie - Saturday, Jan 17, 2004 at 22:22

Saturday, Jan 17, 2004 at 22:22
Eric,
Sorry if I've mislead you. Mine is a ST wagon, not a cab chassis; but that would a great idea for the ute owners to consider.
I'm nowing going to be hanging on to see how GOLDFINDER gets on once he's done some tests. Jeez, Goldfinder, you don't waste much time making a decision.....good luck and hope it works real good. Did you say in a previous post whether or not you've already installed a new Nissan fan?
Roachie
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FollowupID: 305675

Follow Up By: goldfinder - Monday, Jan 19, 2004 at 13:35

Monday, Jan 19, 2004 at 13:35
No Roachie I haven't installed a new fan. Nothing wrong with the original one. BTW paid for the new rad from PWR today.
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FollowupID: 305781

Reply By: Michael_FNQ - Saturday, Jan 17, 2004 at 22:43

Saturday, Jan 17, 2004 at 22:43
I found it was better to solve what caused the heat rather than get rid of the end result. 3" exhaust and intercooler - heaps more power and the standard radiator copes fine, no more overheating!
AnswerID: 43388

Follow Up By: Roachie - Sunday, Jan 18, 2004 at 19:39

Sunday, Jan 18, 2004 at 19:39
Michael,
I've already done the 3" mandrel bent exhaust trick (with small hotdog muffler and no catalytic converter), but she still gets hot. The intercooler is another option, but opinion seems to vary among the "experts" as some say the extra air able to be crammed in to the combustion chamber, thereby increasing the size of the bang, actually increases the engine's operating temperature. Who are we supposed to believe? Not doubting you at all Michael, as I suppose every vehicle has it's own little idiosycrancies (cripes I hope I spelt that right!!), and they react a bit differently to each other. Looking at mine again today with a mates side by side, we checked the viscous fans on both with the engines cold. His had a noticeable amount of increased drag when we turned the fans by hand, so the fan probably needs to be replaced or at least serviced to get it operating properly.
Thanks,
Roachie
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FollowupID: 305742

Follow Up By: Michael_FNQ - Sunday, Jan 18, 2004 at 22:41

Sunday, Jan 18, 2004 at 22:41
I your viscous fan is not working then nothing will keep it cool, a new one may solve your problems. If the vehicle has always had heating problems then checking the pump timing might help.
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FollowupID: 305754

Reply By: Flash - Tuesday, Jan 20, 2004 at 10:44

Tuesday, Jan 20, 2004 at 10:44
You can't test your viscous fan by moving it by hand.... ever.
The only way to test it is.. Does it ROAR?

ie: when your engine is hot, the fan should roar when you rev, if not then it's stuffed. It's that simple.
AnswerID: 43644

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