Overheating Y60 4.2 petrol Patrol

[Rudolph]

Hi Peter,

Ek het die impeller gemeet dit is 75.8mm. Het ook uitgevind by Master Parts nuwe pomp vir ons karre is R495.00.

Groete,
Rudolph

[Peter Connan]

Thanks Rudolph

Weet jy dalk wat die part nommer is?

Dankie
Peter

[tour de frans]

Goeie Dag Peter.Johndough Is 100% reg met wat hy se en voorstel.

[Peter Connan]

Hello Guys

My impellor measures 75.7mm, so I doubt this is the problem.

On Frans's advise I am now going to purchase a new viscous coupling, and the fan from a 2.5l Ford Ranger diesel. I will obviously also have to build a new cowling. I will let you guys know how this setup performs. I will also purchase a new water pump, just in case.

Cheers, and thanks for all the advise and assistance.
Peter

[Grant]

Hi Pieter,


Check on my diesel troll. Coupling is identical to 80 series cruiser diesel coupling. Also steering pump seals are identical. Read this thread on the Aussie forum. It is for a diesel but could help you.


http://www.patrol4x4.com/forum/nissan-p ... ndex6.html

[Peter Connan]

Thanks Grant
I owe you guys an update, I am currently running with a viscous fan borrowed from a friend, but without a cowling. The car runs much cooler and the temperature is also much more constant. One of these days I will get/make a cowling, but it certainly now seems as if the viscous coupling was the original problem.

Thanks for all the help you guys have provided.

Regards
Peter

[philr]

Hi, i love my 4.2 lit 1993 SGL patrol, it only has 200 000k on the clock, but has a similar/identical overheating issue. At very slow speeds, hot days, 4x4 or 4x2 a slow but inevitable rise of temperature is seen, if we put the insdie heating on it helps, but is 1) worrying 2) anoying. we also did the silverton radiatior thing and i have just bought a 14inch electric fan from Mr Turbo in jet park, but not fitted it yet. i appreciated the comment about Masterparts, their water pump is under R300, so very reasonable, and i will order one but do not think water pump is the issue. i do have free flow exausts, so will get mineral wool tape from ATS in bergbron, JHB, and try putting that around to keep it all cooler in the engine bay. If you have any other thoughts or progress on other actions please let me know. We also get petrol cavitation when it is very hot and the engine is very sensetive to fule filter cleanliness. i have a mechanical fuel pump so thats probably the cause, but havnet bypassed it yet. Phil

[Sias]

Philr - what is this mineral wool tape you are talking about? Will it make a big difference in bringin underbonnet temperatures down? Do I just wrapp it around the headers and the down-pipes?

[AndriesS]

Hi Phil,

The heat shield tape should work, Autostyle in Mayfair used to keep the same stuff but I'm not sure about the quality - should be cheaper than ATS. The initial claim of teh tape was increased performance as the heat is kept inside and kept the energy of th gas flow up - very similar to what ceramic coating will do.

Just a warning, some people have complained about corrosion and cracked headers when they used the tape, this was due to the heat build up inside the exhaust header /down pipes and condensation.

[Peter Connan]

Hi Phil

I used that tape once on my Lotus Europa, and shortly thereafter the branches started cracking of about 1" from the manifold flange. I beleive the tape caused uneven stresses in the manifold due to the manifold heating up faster and reaching higher temperatures. I would not recomend using tape on an older manifold. Perhaps the ceramic coating is better, but I have no personal experience of this.

With regard to the electric fan I am now convinced that an electric fan cannot shift the amount of air that a viscous fan can. If you can find a way to add the electric fan without removing the existing viscous fan, that may be worth doing, but if you intend replacing the viscous fan with a 14"electric unit, I would strongly advise against that. I had two 14"electric fans, but they did not work.

Although it is a bit extreme, I beleive Pieter's modification where he placed the Aircon heat exchanger under the car is a good way of helping the cooling system.

Two questions: Is the radiator fan shroud in place (both pieces), and have you checked the viscous coupling? This seems to have been the problem in my case, although as I have not yet replaced the shroud I am not 100% sure yet.

Good Luck
Peter