Heating issue 4.8
Posted: 31 Oct 2019 12:08
Hi guys
So we havent done a trip in the patrol for a while now and last week we left the tuli block to go to durban. As you know there was quite a heat wave recently and the outside temp got to 40 degrees. Soon after on the up hills the patrol started to heat up to the 3/4 mark but came back down to below half very quickly if I backed off the throttle and slowed to 100.
At this stage the patrol was empty and we were towing a small empty venter trailer which I think weighs about 200kg.
I had a small leaking pipe at the oil/water heat exchange and I thought maybe I have an airlock. I called Graham at g-tech and he told me to open the bonnet to the first latch and secure it so it cant fly open as I didnt have time to stop in pta. That solved the issue all the way to durban.
On the way back the outside temp was 25 degrees all the way back to polokwane. Now we were towing a full trailer at about 700kg and even going up the pass at harrrismith we had no issues at all. Only at alldays it got to 33 degrees and again the heating started.
So today I checked everywhere for leaks, the coolant levels look good and I ran the engine up to temp turned the heater and fan onto full and took the cap off the pipe at the fire wall to bleed the system. At first there was alot of pressure as I took the cap off but it soon went to a trickle then basically stopped only spurting a few drops every now and again. I left it running like that for 10min but no solid stream of coolant appeared.
I ran it for longer and it seems like the thermostat opened and both the top and bottom pipes got hot. Still no solid stream of coolant from the bleed cap unless I rev the engine and as it the revs come down it shoots a short solid stream then stops again...
Please does anyone have any ideas? I have a trip around bots in 10 days which I wont be able to do if I cant get my baby back to good health
Graham was also worried about my viscous coupling.
So we havent done a trip in the patrol for a while now and last week we left the tuli block to go to durban. As you know there was quite a heat wave recently and the outside temp got to 40 degrees. Soon after on the up hills the patrol started to heat up to the 3/4 mark but came back down to below half very quickly if I backed off the throttle and slowed to 100.
At this stage the patrol was empty and we were towing a small empty venter trailer which I think weighs about 200kg.
I had a small leaking pipe at the oil/water heat exchange and I thought maybe I have an airlock. I called Graham at g-tech and he told me to open the bonnet to the first latch and secure it so it cant fly open as I didnt have time to stop in pta. That solved the issue all the way to durban.
On the way back the outside temp was 25 degrees all the way back to polokwane. Now we were towing a full trailer at about 700kg and even going up the pass at harrrismith we had no issues at all. Only at alldays it got to 33 degrees and again the heating started.
So today I checked everywhere for leaks, the coolant levels look good and I ran the engine up to temp turned the heater and fan onto full and took the cap off the pipe at the fire wall to bleed the system. At first there was alot of pressure as I took the cap off but it soon went to a trickle then basically stopped only spurting a few drops every now and again. I left it running like that for 10min but no solid stream of coolant appeared.
I ran it for longer and it seems like the thermostat opened and both the top and bottom pipes got hot. Still no solid stream of coolant from the bleed cap unless I rev the engine and as it the revs come down it shoots a short solid stream then stops again...
Please does anyone have any ideas? I have a trip around bots in 10 days which I wont be able to do if I cant get my baby back to good health
Graham was also worried about my viscous coupling.