Plastic engine fans cracking

[nismat]

Great tip, will order mine in the next few days, my fan is definately cracking! Thanks for the tip!

[MQ MAD]

Great tip
Just done my fan on the GQ few months back
Fairly simple job really,a few beers worth and done
The MQ/MKs also suffer from this problem
The TD 42 fan is the same bolt centres as the SD (either n/a or T)
Although the SD fans come in 2 styles,either straight blades or blades with tail (if u like)


From memory my fan was under $70 posted
Not a real fan (pun intended) of thermos
Factory fans flow alot more CFM of air than thermos

[GQ TANK]

Sorry grave dig.

The tb42s and TB42efi fans are different and cannot be swapped (the centre are differant size). i currently have a new tb42e fan - need one for a tb42s

[mudski]

Sorry grave dig.

The tb42s and TB42efi fans are different and cannot be swapped (the centre are differant size). i currently have a new tb42e fan - need one for a tb42s

Good post mate. Also you can use a tb45 fan on a zd30. They are the same fan but with 5 mm difference in offset.
Cracked fans are more common than I thought. I check my fan as part of my 5k service I do, among other things. ...

[CPOCSM]

I went through the fan and viscous coupling saga recently and my head was spinning about the differing diameters. I simply bought the new coupling and took it to the wrecker here in toowoomba and matched it to a new fan they had in stock. Turned out repco got the wrong one in as the bolt pattern on the dayco unit, supposedly for a TB42E, was actually a TD42 one. Blade setup is identical with both but spacings were different. So now have a TD42 viscous hub and a TD42 fan on a TB42E...confused yet?

Temperatures are now right on 83 degrees in 35 degree days here coming up the range into toowoomba. Temperature gauge doesn't get above 1/3 and can hear the fan clutching in and out. There was a noticeable drop in acceleration though as the new coupling and fan are offering a little more resistance than the clapped out items I replaced. The old fan was totally cactus and had cracked between every blade right down to the metal hub thingy...

[jay see]

This was mine
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1421669598711.jpg

[pat in a troll]

sometimes second hand fan clutches that look fine from the outside can have worn insides which will end up costing you when it finally cracks. it's a good idea to replace it with a new part as it'll save you time, money and collecting parts (or possibly paying postage).
also the viscous clutch can wear out over time which can cause things like overheating at idle or poorer fuel economy and power