TD42 all of a sudden overheating

Engines and Engine Systems
Tiny Howarth
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Re: TD42 all of a sudden overheating

Post by Tiny Howarth » 16 Mar 2017 17:34

ricster wrote:Thanks Tiny.... its perfect.

I took a drive through to Nissan quickly to hive myself a quick little heart attack, and raise the blood pressure ..... :surprised: :surprised: :surprised:

R 1950.00..... are they off their friggin dumbass minds.... oh, that is without a 10% discount.... whoopie friggiin doo !!

While I was there I was looking at a price for a rubber boot that sits on the gearbox that stops dust entering the gearbox where the 4x4 lever and gear lever fit into the gearbos.... guess what.... for this piece of rubber ...... R 4500... for a rubber !!! ( and no I didn't make a mistake with the zeros !!!)

Marnino4x4 ( Terain Tamer ) has a GQ TD42 radiator hose set for me at a VERY reasonable price, but I don't know if it will fit the GU TD42..... anyone with any knowledge on this please assist??
Gosh hoses are expensive yes, but the rubber boot very mad :thumbdown: :thumbdown: :thumbdown: :redface:

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Re: TD42 all of a sudden overheating

Post by ChristoSlang » 16 Mar 2017 17:50

Cedric, I replaced the radiator hoses on Chuck earlier this year and paid about the same price.

The bugger is that they had no stock whatsoever in ZA, so I had to pay the full price up front and then wait another month for them to arrive from over the ocean...
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Re: TD42 all of a sudden overheating

Post by Pieter B » 16 Mar 2017 20:44

Can't you perhaps use those flexible type hoses in the meantime. I used this a few years ago on a conversion. I bought the pipe from Vee's automotive pipes in Jburg.

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Re: TD42 all of a sudden overheating

Post by Peter Connan » 16 Mar 2017 21:21

Pretty sure the main radiator hoses will be different, as the GQ radiator is wider but shallower.

If it's the smaller hoses that don't have special kinks in them, get some good- quality hose from one of the specialist hose suppliers like Parker Hannifin?
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Re: TD42 all of a sudden overheating

Post by ricster » 16 Mar 2017 22:13

yeah looking at the pics on the internet there looks like a slight difference, but for the price Marino4x4 ( Terrain Tamer ) will sell me a GQ set I can buy both the GQ and GU set for less than Nissan can supply.

I have actually arranged with Marinus to send up the GQ set and I'll have a look. I'm going to order a set from him for the GU anyway. If I panelbeat the GQ set for a temp solution, its still going to be almost half the price of Nissan and it comes with clamps and everything.... Well done Marinus for your support and assistance and damn reasonable prices !!!!!!!
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Re: TD42 all of a sudden overheating

Post by davidvdm » 18 Mar 2017 15:37

ricster wrote:Thanks Tiny.... its perfect.

I took a drive through to Nissan quickly to hive myself a quick little heart attack, and raise the blood pressure ..... :surprised: :surprised: :surprised:

R 1950.00..... are they off their friggin dumbass minds.... oh, that is without a 10% discount.... whoopie friggiin doo !!

While I was there I was looking at a price for a rubber boot that sits on the gearbox that stops dust entering the gearbox where the 4x4 lever and gear lever fit into the gearbos.... guess what.... for this piece of rubber ...... R 4500... for a rubber !!! ( and no I didn't make a mistake with the zeros !!!)

Marnino4x4 ( Terain Tamer ) has a GQ TD42 radiator hose set for me at a VERY reasonable price, but I don't know if it will fit the GU TD42..... anyone with any knowledge on this please assist??
Cedric, take measurement on the gearbox of the size boot you need, then go check at midas for size of cv boot that will fit on there. I did this on the sani many years ago. Mine took a cv boot from a Mini, if I remember correctly, at a cost of around R55. :blonde:
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Re: TD42 all of a sudden overheating

Post by iandvl » 18 Mar 2017 17:47

davidvdm wrote: Cedric, take measurement on the gearbox of the size boot you need, then go check at midas for size of cv boot that will fit on there. I did this on the sani many years ago. Mine took a cv boot from a Mini, if I remember correctly, at a cost of around R55. :blonde:
My "boot" also needs replacing.

Issue is, it is not really a boot. From what I have gathered, it is a steel plate with a boot attached to it somehow. Some sources say 'bonded" etc. I have no idea. But Graham has informed me that the parts are ueber expensive...

Should someone work out a reasonable solution, please post - I will sponsor beer. Alternatively, I will haul mine out and see what plan I can make once I have worked out whethet my Malawi trip goes forth or not. In that case, I will post, and someone can sponsor my beer.... :rolling: :rolling:

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Re: TD42 all of a sudden overheating

Post by Brett Bignoux » 19 Mar 2017 18:54

Evening Cedric .

Did you manage to sort out your overheating problem yet ?
You say that when it was idling , the temperature went up high with the aircon on . Was the electric fan for the aircon working ?
Your vicous fan clutch is not working properly any more , it should have kicked in before the engine got too hot . (that's why it gets hot on longer up hills).
Your aircon radiator also gives off lots of heat , which travels through the main radiator fins .(electric fan compensates for the extra heat generated)
If both fans are not working properly , the up hills will cause lots of extra heat with inefficient cooling . The lack of pressure in the cooling system will also cause hot running . Make sure you use a good quality antifreeze , for corrosion protection , anti scale build up , and for water pump lubrication .
AS A TEMPORY / EMERGENCY FIX , you can use a strong cord or small nylon rope to secure one fan blades to one of the four mounting nuts of the viscous coupling .
You will now have a fan running permanently . (it will knock your fuel consumption and engine power a little bit) Try not to use wire as it will break from the lack of flexability and you don't want to damage the fan blade . (I have had to do it on two occasions for myself).

I hope this is of some help to you . Cheers for now , Brett .
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Re: TD42 all of a sudden overheating

Post by ricster » 20 Mar 2017 10:17

Brett,

I decided on Saturday morning to do some detective investigation.... CSI Maimi.... meets CSI LA ( Lower Alberton - which is a town just south of Joburg ).... :rolling:

Why was the Patrol all of a sudden getting hot? That small leak on the top radiator hose surprised me that it could be the cause, as the hose is still very "soft" and plyable, and not hard or cracked. The coolant water is crystal clear , but a dark shad of blue from the coolant mix ( no rust or contaminants ). The water pump cannot just all of sudden not work. If that was the problem there would be a slow progression from not overheating to overheating, not a sudden now it works, and now it doesn't. The thermostat is working perfectly and still looks brand new. There is no airlock in the system as it would have air in the radiator when I check it when cold. Its not the cylinder head, as I would see bubbles when its hot through the radiator.

Now the viscous fan is 2 years and 2 months old. I bought it from the guys in Cape Town that many of us have bought from ( I cannot recall their name, but will have to search in a few mins to get their number to order another one ). So while the motor was hot I listened to the fan and it didn't sound like it was locked or even semi locked, so I took a piece of rubber pipe to see how "locked up" the fan was. I was gobsmacked that I could stop that fan with hardly any effort at all. I switched the car off and memorized roughly how tight the fan was to spin.

Once the car was cold the fan took the same amount of effort to spin, so I think now that the viscous fan has konked out, which caused the overheating which caused higher pressure ( radiator cap is a 0.9 bar cap if I recall ) which caused a slight leak on the hose.

Now to get a new viscous .... and quickly !!

So Brett you were bang on the mark. My aircon fan bearing was making horrible noises a year or so back so I disconnected it as many Patrols here in South Africa don't seem to even have then fitted. I never really had any issues with the fan not operating so was never in a rush to change it. Michael on the forum offered me his old aircon fan a few months ago so I swapped it out this weekend too whilst all the investigation work was taking place.

So .... CSI LA investigation report..... Even a "new viscous" fan that has only done maybe 35 000Km can die on you.

When I took the viscous out this was the first thing that caught me eye.... That "spring" heat thermostat thingy shouldn't look like that!!! The end of the " spring isn't even attached to the center spindle!!
DSC_1221a.jpg
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Re: TD42 all of a sudden overheating

Post by iandvl » 20 Mar 2017 10:26

Cedric,

I assume that spring is what has caused this... If you're battling to get a viscous, I've got a spare for a 4.5. I replaced mine a while ago and kept the old part. It's old so it's not perfect, but it still worked when removed. It should still be OK as a temporary replacement whilst you wait for a new one. A heck of a lot better than the one you've got currently at any rate. But I'm not sure whether the 4.2 and 4.5 viscous couplings are the same. I've attached a picture for comparison.
viscous.jpg
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If you want it, let me know and we can make a plan to get it to LA.

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