Bustrucket
Active Member
- Posts
- 380
- Location
- Shropshire
Hi,
I’ve a Disco Td5 that is showing the following issues:
Runs well for 20 minutes, temp comes up to half way on the gauge and stays there. Drives well on or off road during this time. Then it slowly creeps up to the red and immediately drops to nothing with the red light on, along with low power from the engine. The heaters are intermittent and then blow cold.
I picked it up last week as a trade for something else, so on Sunday I took it around the Stiperstones - this was the first time it overheated on me. Took the rad cap off, ran away from the ensuing liquid volcano and then replenished the coolant. It didn’t do it again for the rest of the day but the heaters went cold quite quickly so I didn’t drive far.
Monday I took the cooler group apart and went looking for problems.
So far:
Thermostat replaced (old one full of crud and gunk)
Rad flushed out (lots of crap in the rad)
Engine flushed out - (ran pretty much clean, no gunk or debris)
Previous owner reckons it’s just had a new header tank cap
New bleed screw (alloy)
Refilled with tap water using the method described in Rave
Slung it all back together yesterday and it’s driven ok. Took it on a longer drive today and eventually the same thing happened - gauge rose to the red then immediately dropped to nothing with red light on and engine in limp mode.
Got home and got the thermometer gun out - engine is around 70-80c depending on where the gun was pointed, rad top hose was at 100c, rad at 25-30c wherever I could measure it, header tank 50c and whole engine bay not feeling particularly hot.
The rad top hose was solid and roasting - cracked off the bleed screw and plenty of steam escaped but no water.
The water pump appears ok - certainly when running it can push a fountain of water out of the bleed screw. Stat - new, should be fine. Rad - looks rough but ok. Bulged at the bottom though.
How well should the outlet for the pipe that leads up to the fuel cooler/header tank flow? When I put the hose in the rad the main lower outlet flows well, but the smaller outlet only has mild flow even if all other outlets are covered. Might this be part of the issue?
Final thoughts are that the head gasket is ****ed or the head is cracked, but there’s no water/oil mix and the oil doesn’t smell of diesel. Will whip the cam cover off though at some point and double check the injectors.
Any help much appreciated.
Cheers
I’ve a Disco Td5 that is showing the following issues:
Runs well for 20 minutes, temp comes up to half way on the gauge and stays there. Drives well on or off road during this time. Then it slowly creeps up to the red and immediately drops to nothing with the red light on, along with low power from the engine. The heaters are intermittent and then blow cold.
I picked it up last week as a trade for something else, so on Sunday I took it around the Stiperstones - this was the first time it overheated on me. Took the rad cap off, ran away from the ensuing liquid volcano and then replenished the coolant. It didn’t do it again for the rest of the day but the heaters went cold quite quickly so I didn’t drive far.
Monday I took the cooler group apart and went looking for problems.
So far:
Thermostat replaced (old one full of crud and gunk)
Rad flushed out (lots of crap in the rad)
Engine flushed out - (ran pretty much clean, no gunk or debris)
Previous owner reckons it’s just had a new header tank cap
New bleed screw (alloy)
Refilled with tap water using the method described in Rave
Slung it all back together yesterday and it’s driven ok. Took it on a longer drive today and eventually the same thing happened - gauge rose to the red then immediately dropped to nothing with red light on and engine in limp mode.
Got home and got the thermometer gun out - engine is around 70-80c depending on where the gun was pointed, rad top hose was at 100c, rad at 25-30c wherever I could measure it, header tank 50c and whole engine bay not feeling particularly hot.
The rad top hose was solid and roasting - cracked off the bleed screw and plenty of steam escaped but no water.
The water pump appears ok - certainly when running it can push a fountain of water out of the bleed screw. Stat - new, should be fine. Rad - looks rough but ok. Bulged at the bottom though.
How well should the outlet for the pipe that leads up to the fuel cooler/header tank flow? When I put the hose in the rad the main lower outlet flows well, but the smaller outlet only has mild flow even if all other outlets are covered. Might this be part of the issue?
Final thoughts are that the head gasket is ****ed or the head is cracked, but there’s no water/oil mix and the oil doesn’t smell of diesel. Will whip the cam cover off though at some point and double check the injectors.
Any help much appreciated.
Cheers
