TB GQ fan cracks

Submitted: Wednesday, Feb 11, 2004 at 13:19
ThreadID: 10446 Views:1415 Replies:3 FollowUps:3
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More of an information thing than anything else, mate of mine has a 97 TB engined GQ Patrol (Auto) with 190,000K's, regularly serviced and not abused, to a point, does a fair amount of gravel work. Recently took the vehicle in for it's service only to be told the main fan has several lateral cracks going through the plastic fan hub, could have significant consequences if one let go, something worth checking, new fan cost about the $500 mark, not sure if that was including fitting or just the fan. Nissan couldn't explain there and then what caused it.
It's a bit like the horn bracket that cracks and allows the horn fall down between the air con rad and the steel work, this eventually wears through the radiator core with obvious results, the cables are long enough so the horn doesn't disconnect and still works. Keep the shiny side up
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Reply By: Gerry - Wednesday, Feb 11, 2004 at 14:02

Wednesday, Feb 11, 2004 at 14:02
Hi Martyn,
It's not an uncommon problem with GQ's. My personal thoughts are that it is due to having a steel centre moulded into the nylon blade outer section with subsequent different expansion rates. As the nylon gets a little older and more brittle, they tend to crack. However, there is an after-market alternative replacement for about $100. Here in SA, I have found that most of the larger 4WD wreckers have them in stock.
AnswerID: 46328

Follow Up By: Martyn (WA) - Wednesday, Feb 11, 2004 at 14:08

Wednesday, Feb 11, 2004 at 14:08
Thanks Gerry, I'll pass this on.
Keep the shiny side up
FollowupID: 308213

Reply By: colin - Wednesday, Feb 11, 2004 at 15:24

Wednesday, Feb 11, 2004 at 15:24
you will probibly find it is a non genuine fan i had the same poblem after buying the one for a $100. best bet is to buy the nissan fan same as the fan clutch non genuine dont do the job. Col
AnswerID: 46342

Reply By: chrisfrd - Wednesday, Feb 11, 2004 at 18:28

Wednesday, Feb 11, 2004 at 18:28
G'day there. You are better off replacing the worn thermo units with electric fans.

I've done about 5 of them now and they are sweet. It stops the engine from thermal stress and they can be rigged to work after switch-off for a while, allowing the cooling of the engine and coolant.

My GU 3.0TD is configured this way and it proves to be very good indeed.
AnswerID: 46383

Follow Up By: Ferret - Wednesday, Feb 11, 2004 at 21:20

Wednesday, Feb 11, 2004 at 21:20
What size and type of fan did you use and how much?
FollowupID: 308266

Follow Up By: chrisfrd - Thursday, Feb 12, 2004 at 10:00

Thursday, Feb 12, 2004 at 10:00
I've got two 12 inch fans on rear of my heat-exchanger, with a single 12 inch on the front. They are running from a custom made controller that managed tempurature and running time. Could run the fans on for 20 minutes after engine shutdown. I have the software that I wrote for it somewhere...

The standard controllers are fine too, they are really good if you wire them into the vehicle via a Jaycar turbo-timer kit that will allow the fans to run on for a while.

The whole setup, including my PIC computer (mounted under the bonnet) was $299 and is fairly well water proof. If the fans get dunked, they just stop spinning until they are clear of water.
FollowupID: 308314

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