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28th March 2022, 08:07 PM
#1
Help ZD30DDTI getting Hot
Hi All Im New to this forum and to owning a patrol I have a slight overheating issue with my patrol I have recently replaced the thermostat, water pump lower radiator hose, the radiator is 4 years old coolant at 50% mixture so what happens is when driving for no real reason the temp will rise as high as 110 deg and then will drop back to around 100 deg on some tracks in low range not working really hard and then i get back on the hwy and it will drop back to 82 deg and then jump up to 96deg its all over the shop i don't seem to have any leaks and every thing seems to be in good order I mot sure why it gets so hot and then cool down so its not getting hot all the time. doing my head in.
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28th March 2022 08:07 PM
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28th March 2022, 08:30 PM
#2
is it a DI or CRD . does it have a bullbar , if it is the standard ARB bullbar there is a plate underneath that goes from the bullbar to the body infront of the radiator , it helps funnel air thru the radiator . there is also a airdam that is connected to the body after the radiator and drops down infront of the steering gear , this helps maintain the low pressure area in the enginebay as does the rubber skirts in the front wheel arches by separating the high pressure zone in the wheel arch area from the low pressure zone in the engine bay . there is also a rubber strip on the underside of the bonnet at the front that stops air from going over the top of the radiator . all these things are important and need to be there to create a high pressure zone in front of the radiator and a low pressure zone behind the radiator to cause air to flow thru the radiator .at low speed the fan does the job if it is working correctly .
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mihit (23rd November 2022)
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29th March 2022, 05:47 AM
#3
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29th March 2022, 06:21 PM
#4
Thank you for your help I think I will take it to my mechanic to see what his thoughts are.
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30th March 2022, 02:34 PM
#5
The master farter
Viscous hub not kicking in? When the motor is hot is there any resistance if you try to spin the fan by hand?
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30th March 2022, 04:33 PM
#6
I am he, fear me
What Mudski said x 2... dodgy viscous hub is easily the most common issue in 'hot' ZD30's... not always certainly but more often than not.
Dolphins are so smart that within a few weeks of captivity, they can train people to stand on the very edge of the pool and throw them fish.
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30th March 2022, 07:37 PM
#7
.........
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22nd July 2022, 07:23 AM
#8
Thank you all for your response.
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21st November 2022, 09:55 PM
#9
Originally Posted by
ynot65
Hi All Im New to this forum and to owning a patrol I have a slight overheating issue with my patrol I have recently replaced the thermostat, water pump lower radiator hose, the radiator is 4 years old coolant at 50% mixture so what happens is when driving for no real reason the temp will rise as high as 110 deg and then will drop back to around 100 deg on some tracks in low range not working really hard and then i get back on the hwy and it will drop back to 82 deg and then jump up to 96deg its all over the shop i don't seem to have any leaks and every thing seems to be in good order I mot sure why it gets so hot and then cool down so its not getting hot all the time. doing my head in.
Thanks a lot for all the replies. I will take it to my mechanic to see what his thoughts are.
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23rd November 2022, 05:19 PM
#10
IF it proves to be the fan hub, refilling one isn't a major job. need silicone grease and a shitload of brake-cleaner or similar solvent.
Some have a bolt in a hole to facilitate draining/filling, some you get to make your own hole.
Though with the cost of aftermarket spares you really have to weigh up what your time's worth.
- 1990 LWB Safari flatdeck, TD42 -
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1989 LWB 5-Seat, TD42
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