45 series Troopy Overheating with Chev V8

Submitted: Tuesday, Oct 03, 2006 at 22:28

ThreadID: 38243 Views:3982 Replies:4 FollowUps:3

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Bevyn

Hi, I have a trusty old 45 series Troopy fitted with a 350 V8 chevy and running on LPG and Petrol. I am having serious problems with her overheating, particulary at low speeds. It has a brand new radiator, water pump, a second hand clutch fan and a specially manufactured fan shroud to catch as much air as possible. I am contemplating fitting a Thermo fan, but are unsure how to go about it.
What type would best suit my needs?
It has an Airconditioning radiator fitted in front of the radiator, so clearance will be a problem here, so I think I need to fit a pull fan.
Do I disregard the fan and go Thermos' only?
Do I need thermastatic controllers or a manual switch?
Do I need an Auto sparky to fit it?
Any other advice would be GREATLY appreciated!

Regards Bevyn

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Reply By: Gerhardp1 - Tuesday, Oct 03, 2006 at 22:36

Tuesday, Oct 03, 2006 at 22:36

Hi Bevyn,

A friend has the same setup in his 60 series - Chev 350, standard thermo fan adapted via a Marks 4WD Adaptors thing, about $50 I think, and a re-worked 60 series diesel shroud to enclose the fan.

His used tp overheat when it had 2 electric fans stuck on the front of the aircon radiator, so a trip to Marks for advice resulted in the change to the "standard" setup. This has solved the problem in the 60 series.

I wouldn't go for the electric fans as they block too much airflow, and it seems you don't have enough now. If you are in Melbourne check with Mark's as they have lots of Toyos with chevys and will probably have the solution for you.

AnswerID: 197716

Reply By: gen3rules - Tuesday, Oct 03, 2006 at 22:38

Tuesday, Oct 03, 2006 at 22:38

dont waste your time with thermos. Ditch the fan clutch and fit a high flow fan direct drive to the motor. Was the only thing that would keep my v8 40 cool. tried thermos
new clutches etc. Chase up one of the new high volume fans and direct drive it will solve the issue. Will be a tad noisy tho.

AnswerID: 197717

Follow Up By: Bevyn - Tuesday, Oct 03, 2006 at 22:48

Tuesday, Oct 03, 2006 at 22:48

gen3rules, thanks for the prompt advice, where do you think I maight be able to get my hands on one of these?

Regards Bevyn

FollowupID: 456249

Follow Up By: ross - Tuesday, Oct 03, 2006 at 23:57

Tuesday, Oct 03, 2006 at 23:57

Performance shops usually sell stuff like that.
Get the biggest 7 blade fan you can find that will fit and run it full time.

FollowupID: 456257

Follow Up By: gen3rules - Wednesday, Oct 04, 2006 at 22:17

Wednesday, Oct 04, 2006 at 22:17

Sorry cant remember where we used to get them from. I think it was from one of our aircon suppliers. drop me an email at maloo285athotmaildotcom if you want me to chase it up. cheers

FollowupID: 456441

Reply By: banjodog - Wednesday, Oct 04, 2006 at 06:59

Wednesday, Oct 04, 2006 at 06:59

Having fitted a 307 Chev in a FJ40 about 20 years ago, to prevent any overheating issues I had the origional radiator custom built to be a 7 (seven) core and used a low temp opening thermostat - it was about the 87 deg opening temperature - don't remove the thermostat, install a lower temp one instead. I also used a 7 blade stainless steel flexy fan that really draws in the air at low RPM's and then flattens out at high speed - so less drag on the engine and then the road speed does the cooling, the fan shroud was a custom job too to cover the fan.

Didn't experience any overheating, even slow going in the beach traffic. The stainless steel fans can be bought from Repco, Super Cheap Auto etc etc - about $100ish. The radiator cost $400 at the time and weighed 20kg empty - but you need the water volume to stay cool and the only way to increase that is to increase the number of cores in the radiator.

The easiest solution is to keep it simple.

AnswerID: 197740