3.5L rebuild?

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Originally Posted by muddydigger

Personaly if you worried Id be removing the fan on it and putting twin 14 inch thermo fans on. I did this to mine and mounted them on a alluminum shroud i made up.
It will enable the car to get to operating temp quicker, use less fuel as it not continually turning a fan andd run quieter too. its also a lot more reliable.
I neve had a problume over heating even when doing some pretty hard stiff on 38 degree days with the aircon on. just my 2c worth.

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Do you mean remove the original belt driven fan? Are they wired-on or swithched by something?

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Originally Posted by Bulldog

Do you mean remove the original belt driven fan? Are they wired-on or swithched by something?

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Yes remove the engine driven fan altogther. this will enable th room to fit the twin 14 inches.( twin 16s wont fit I tryed twin 14s are as big as you can fit)> If you think about it the normal viscos fan is 16 inch so twin 14 will generate alot more air. they are thermasticallycontroled with a probe in he top radiator hose. If you can buy a complete kit which has the temp controle in it. this will enble you to set the temp at which the thermos will cut in. if its all setup right the fans will run for about 15 to 25 seconds in normal driving conditions and then swith off. they shouldnt need to come on at all whilst your moving at say 60 klmh. Davies craig does a whole kit. You should be able to but all the stuff fom any reputable car store even Repco.
Alternativly ive heard of Ford Falcon ef thermos being used as well but youll still need to buy the thermo temp switch.

Wow! Very interesting... i'll look into that.

Thanks again for all your help guys. Much appriciated. Lots of things for me to try...

Regards to aftermrket cams, it's all bull****. I've always used Dyntech cams (std profile) and never had any issues. Like JustinC said, if they're badly timed and fitted this may cause a few issues. I pulled mine out 3 times before I was happy with the cam timing (bit anal but it was worth it).

Ivan tighe cams are also not bad, fitted one to my 93 Rangie and it had 70,000 kms on it before I sold the engine (shouldn't have but needed the money when the insurance company ****ed me up the **** :eek: :eek: :eek: :mad: :mad: :mad: :mad: ).

Trav

There's a Wade cam on ebay for a Rover V8. I was thinking about this. Maybe saving it for the future if/when i need/want it...

I agree with the aftermarket cams i had a torquemaster cam put in when i rebuilt 3.5 to 4.0 and i think its great bit more lumpy idle but it works great.
Yeah check the inlet pipe on the carby manifold as my old p6v8 3.5 with su's
got clogged up over time and check what fan your rangie should have even my 1974 p6 v8 has a viscous fan 7 blade.

All the best Mark

You definately want the twin AU Falcom thermo fans. They are a very easy to fit and work well. I got my fans off Ebay including the shroud for about $170. You defintaly want to use the plastic shroud or make up your own as this makes a heap of diiference.
You will find that the nose on the water pump which held the old fan blades might be in the way of the thermo's. With a bit of help I was able to make my own lathe and cut off the nose. All I did was but a socket in an electric drill wheck fitted the bolt on the end of the nose. With this I could spin it around then I held a hacksaw in place and it cut it off an still kept it all balanced.:D

I used crow cams in mine. I also made sure I got the "towing cam" which gives you a bit more torque down low.

I hope this helps I think you should look seriously at what has been said by the brothers in terms of why it’s overheating.
As a side comment I personally am suspicious of the idea of running a 4x4 in deep sand in 45c heat with an electric fan I think that it will probably end in tears. (A great idea in the UK but not here)
I am however positive about the rover v8 in hot conditions with the experience that I have had in the past. These things with the right radiator will handle the heat as well as any other motor.
Don’t use a standard radiator use something that is a little more efficient than that, I know a guy in Alice Springs that has advised Rover on how they should design their radiators (mind you they didn’t listen) I can put you in touch with him if you like, I have towed a 30 odd foot caravan in heat over 50c without issue all with a 3.5 litre Range Rover with a radiator that he designed.
I had to replace the 3.5 litre Rover motor in my Stage 1 Last week and I ended up buying a long motor from Les Richmond Automotive in Melbourne for $2500 I ended up with a stiff block high compression motor that thus far I am more than happy with. Speak to Andrew I have found him more than competent and I am impressed with the quality of their product.
Duane

incidentally, how do you test to see if the viscous fan is working correctly?