Jump to content

Daz_rad

Members
 View Profile  See their activity

  • Posts

    28

  • Joined

  • Last visited

 Content Type 

Posts posted by Daz_rad

    1991 WD21 overheating

    in 90-95 WD21 Pathfinders

    Posted

    No worries Bud. :beer:

     

    If you don't have much flow, it could obviously be the radiator partially blocked or the thermostat isn't opening up properly. The only way I have ever had a waterpump fail is by leaking, not lack of pumping.

     

    As long as the tranny is running at a reasonable temperature, then there is no reason to go with a larger cooler. Do you know the temperature? How does the fluid look?

     

    B

     

    I don't have a gauge for the transmission temp only a warning light which only ever came on when the fan belt snapped.

     

    The trans oil smells a bit burned but doesn't look too bad. I may have damaged it driving too hot when the fan belt snapped and she was cooking.

     

    I plan on doing a round trip across the desert, over some mountains and through the tropics so I want to have 100% reliability in any situation hence the reason I am considering cooling upgrades (even if I do fix this little heat issue)

     

    I will check the thermostat opens and the water pump doesn't leak before pulling out the radiator. Can I service the radiator myself?

    1991 WD21 overheating

    in 90-95 WD21 Pathfinders

    Posted

    My apologies, but not only is it hard to gauge new members mechanical experience, it is always good to make sure the basics are covered. Even the most experienced of us have missed 'obvious' solutions or become fixated. You can't see what you aren't seeing, eh?

     

    Ok, so the fluid is good and so is the fan clutch. All that's left is the radiator, thermostat and condition of the cooling passages. WHen it is warmed up and running, can you see good flow with the radiator cap removed? You really shouldn't need a larger radiator if everything is working correctly. I can't recommend one because I can't ever recall anyone replacing theirs with a larger model over stock.

     

    I can't tell you if a Terrano2 oil cooler is a good idea as I have never seen one. For some reason I read that as a transmission fluid cooler, so that was my mistake.

     

    B

     

    Sorry if I came across a bit strong mate I had no intention of having a dig at you, after reading over my reply it can be read as a bit snobby, sorry mate.

     

    Ok I warmed her up and checked radiator flow... Pretty slow and not a lot of movement, all hoses and pipes are new so they should be fine. The dude above might be right I think... Radiator blockage?

     

    Still haven't looked into an oil cooler but I am still considering getting at least one more core added to the radiator. I use it in boggy sand a lot and with the wide 31" tyres the engine is alway working overtime.

     

    I am not sure but I think the transmission cooler is from a supra as that's where the transmission is from. Is it worth looking into a bigger/better cooler for the same reasons as above?

    1991 WD21 overheating

    in 90-95 WD21 Pathfinders

    Posted

    can you tell if the thermostat is opening? Is the coolant circulating? The truck should run cooler so there has to be a problem. It should run cooler with the stock sized radiator in it.

     

    It runs cool during most winter days. We had a couple hot days and it was running just above halfway. It wouldn't be a problem except...

     

    I am a keen off road driver and regularly push the old girl very hard up sandy hills and over sandy beaches and driving with 31" wide tyres she works hard as it is.

     

    I am not having problems just looking do an upgrade.

    1991 WD21 overheating

    in 90-95 WD21 Pathfinders

    Posted

    What temps are you talking about? When does it overheat, fast, slow or all the time?

    I'm not familiar with the diesels but I'll go by common practice which may vary due to the answers above.

    Make sure your fan clutch is working properly.

    Make sure the radiator is not clogged and flush the cooling system with a proper descaling product.

    Make sure your temperature sender is functioning correctly.

     

    If your tranny runs hot, it could be adding heat to the coolant so an aftermarket cooler would help a little. You are running properly mixed antifreeze, not just water, right?

     

    I've owned 4 Nissan trucks over the last 17 years and live in California where it gets to 35-40*C every year (last 3 days actually) and I have never had engine temperature issues if everything was working properly so I suspect there is a culprit, not an overall system weakness. Again, I am only speaking from petrol motor experience though.

     

    B

     

    Thanks to everyone for the replies, I still don't have answers for my questions though.

     

    By hot I am talking about three quarters of the temp gauge and if it's a hot day it will be hot all the time and get close to the top of the gauge before I stop pushing it.

     

    Fan clutch is in perfect working order.

     

    Radiator is clean with fresh coolant 80/20 coolant/water.

     

    Transmission does run hot but nothing drastic. It had a tranny cooler attached.

     

    To be honest I am fairly mechanical minded and maintain my car to the best of my ability. I find that all the guards trans cooler and thermo fan are blocking the air from passing through the radiator.

     

    I never got an answer as to wether a larger radiator fits or any feedback about the oil cooler do I am going to take my radiator to a specialist and have them turn the standard into a three core radiator. There's heaps of room for thickness and it will save me remounting a different type.

    1991 WD21 overheating

    in 90-95 WD21 Pathfinders

    Posted

    Hey guys my pathfinder is not handling the hot days too well over here in Australia and I was curious is anyone knows what I can do to help?

     

    It's a TD27T (turbo diesel) with aftermarket intercooler and bonnet scoop.

     

    My first thoughts were to get a bigger radiator, does anyone know what type of radiator is bigger but still fits well?

     

    My second thought was to take up someone's suggestion and look into an oil cooler from a Terrano II (Mistral) does anyone know if this is effective and efficient?

×
×
  • Create New...