Clutch Fan Help!

[starscream_r32]

ME again! lol.

tried the search but does not come up with anything useful.

I noticed my clutch fan is wobbly. Does it mean it needs replacing or is it a matter of tightening it some how?

If i needs replacing i read there's different types i can get e.g viscious or something?

What would be best for my r32 gts-t?

What parts will i need?

Rough prices?

Where to get them!?

And most important is there a DIY to change it? Can't seem to find any on the forum!

Thankss!

[Plan-FAILURE]

ME again! lol.

tried the search but does not come up with anything useful.

I noticed my clutch fan is wobbly. Does it mean it needs replacing or is it a matter of tightening it some how?

If i needs replacing i read there's different types i can get e.g viscious or something?

What would be best for my r32 gts-t?

What parts will i need?

Rough prices?

Where to get them!?

And most important is there a DIY to change it? Can't seem to find any on the forum!

Thankss!

If its stock you'll have a viscous fan that works by oil expanding in the oil galleries of the clutch which will turn the fan on and off.

Piss the shitty viscous, belt driven, power robbing SOB off and go electric on a thermostat bro.

James

[89CAL]

They dont really rob much power at all, and are work better then some thermo fan setups.....

Check all the bolts, it sounds like something is wrong... Is just the plastic part with the fins loose? or the whole thing (viscus hub as well)?

Might have loose bolts on the water pump but id think if that was the case youd have lost it by now.

[GTRNUR]

The viscous hubs is effective to 4000 rpm before it slips. There isnt a 12V fan in existance that can move the same amount of air that the factory fan can, and if there were they dont make an alternator big enough to drive it. The engineers that designed the factory cooling system know what they are doing. If its in good shape it works very well.

Messing with thermostats messes with your tune too, so keep the stock temp thermostats unless your planning on making massive changes to how your tune works with temperature compensations.

Just fix the factory setup and it will be great.

[pfcr33]

Below is the link to daviescraig part numbers for new clutch if you want to keep the original set up, I am guessing you just unbolt your old fan and remove the clutch and bolt the new one in.

http://www.daviescra...uide%202010.pdf

I think you may need a 5265 http://www.daviescra...65-details.aspx and it looks like they are about $194.04 from that site.

If you want to got electric fans like i did $366.00 for 2 x 12" fans plus $68.77 for the manual thermal switch so thats = $434.77 plus postage i guess, then you would also need to get it all wired up for them to work.

As I can do wiring this part didn't cost me anything.....

Edited January 18, 2011 by pfcr33

[t_revz]

The viscous hubs is effective to 4000 rpm before it slips. There isnt a 12V fan in existance that can move the same amount of air that the factory fan can, and if there were they dont make an alternator big enough to drive it. The engineers that designed the factory cooling system know what they are doing. If its in good shape it works very well.

Messing with thermostats messes with your tune too, so keep the stock temp thermostats unless your planning on making massive changes to how your tune works with temperature compensations.

Just fix the factory setup and it will be great.

agreed^^^

[starscream_r32]

i believe it's just the white/clear actual fans thats wobbly.

ill see if i can get a clip and link it.

might just stick with stock setup =)

thanks for the help guys.

will get back to ya!

=)

[89CAL]

Might be best pulling the fan off the water pump and having a good look at it. If your lucky something might have just come loose

[blind_elk]

Piss the shitty viscous, belt driven, power robbing SOB off and go electric on a thermostat bro.

Unless you fully understand the principle for the usse of a thermo fan, and know how to properly install it and properly operate it, stick with the factory setup. I'm sure Nissan knew what they were doing when they decided on the use of the viscous clutch type against a thermo setup.

[mad082]

also adding more load to the alternator also robs the engine of power, so getting rid of a clutch fan in favour of thermos doesn't give you that much of a power gain. i used to be able to stall my festiva with my sound system turned right up.

[89CAL]

As above.

It just puts load elsewhere in the engine. You may get slight benefit of there being no drag when the thermos are off but still. Its alot of effort for little benefit

[starscream_r32]

hey guys here a link to a clip of my two problems.

fan and cas both moving?

updated inputs would be great!

thanks

[GTRNUR]

What you need is

1. New fan clutch (Get a davies craig one as mentioned above)

2. New radiator fan shroud

3. Timing belt cover with CAS sensor rubber seal

4. 3 bolts for the CAS sensor... not 1.

All of these things are critical. 3 especially, as RB's are interference motors. All it will take is a bolt or socket dropped into the timing belt area and you will slip or break the timing belt and destroy your engine.

What you have there is the downside of a modified vehicle. So many modified vehicles are mess with, without any comprehension of what happens when things go wrong... or with little to no regard for how Nissan designed them.

[starscream_r32]

What you need is

1. New fan clutch (Get a davies craig one as mentioned above)

2. New radiator fan shroud

3. Timing belt cover with CAS sensor rubber seal

4. 3 bolts for the CAS sensor... not 1.

All of these things are critical. 3 especially, as RB's are interference motors. All it will take is a bolt or socket dropped into the timing belt area and you will slip or break the timing belt and destroy your engine.

What you have there is the downside of a modified vehicle. So many modified vehicles are mess with, without any comprehension of what happens when things go wrong... or with little to no regard for how Nissan designed them.

1. is a fan shroud necessary? i've got an aftermarket radiator? don't think it will bolt on to it?

2. is the clear covers ive seen okay? eg.(unless someone can refer me to get a cheaper/better on else where) http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=370435414621&ssPageName=STRK:MEWAX:IT

3. there only 2 bolts holding the cas. for the 3rd would nissan dealer stock them or i'd have to go wreckers or something? (btw... it seem even the metal thing holding the cas also wobbles??)

thanks

[GTRNUR]

I generally prefer original parts as they fit better, rather than some cheap aftermarket thing. You can probably pickup a stock cover cheap 2nd hand from someone else that bought a clear one.

You need this gasket too.

http://cgi.ebay.com/ebaymotors/Nissan-OE-RB25DET-Cam-Angle-Sensor-CAS-Seal-Gasket-RB25-_W0QQcmdZViewItemQQhashZitem2eb20ef2f9QQitemZ200555819769QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

The gasket and the cover together are a spacer that goes between the cas mount and the cas. When its mounted properly it shouldnt move. You obviously need a timing light to align it correctly as well.

The fan shroud is meant to pull air through your entire radiator, not just a small section in front of the fan. Larger cores have more coolant volume and when the air flow is sufficent they can lower coolant temps faster than a thin stock core. But because they are thicker cores the air flows through them less easily. So you actually need a shroud more for an aftermarket core for low speed driving than you would for a stock core. Above 80km/h the fan is mostly not in use.

There is a lot more to it than that though. The thermostat of the engine, the engines ideal operating temp, the heatsync on the front of the thermally activated clutch fan, the rpm of the fan and the load of the fan itself all work together in concert to work properly. Nissan design these things very carefully and the complexity of it goes a lot further than most realise. This is why stock is best for reliability and consistancy, and also why most aftermarket/custom setups only work in specific situations. Modify something and you upset the balance Nissan created.

Edited January 19, 2011 by GTRNUR