overheating

[danielm60660]

I have an overheating problem. Hoping someone here can be of assistance.
Yesterday my 98 Disco overheated, (not to the red, but close) and the coolant in the reserve tank was boiling. I replaced what spilled with fresh fluid and it was fine. I chalked the overheating up to the hot Chicago weather lately. Today the g-friend calls and it was overheating again and had leaked some fluid. (She was short on details). My question is this. Would a stuck thermostat cause the fluid in the reserve tank to boil or could this not be it. I am trying to remember how the coolant flows through the engine and if this makes sense.
Thanks,
DM

 

[95.D1.Rick]

There is alot of good info on this site about d1's cooling and heating issues. Do some searching, it jumps out at you. They are tough trucks but overheating is an easy way to kill your d1. Be alert for headgasket issues now, also the dreaded dropped cylinder liner. Again searches will illuminate these related bummers. Happy digging.

 

[95.D1.Rick]

start with the links at the bottom of this page. This site is great.

 

[Gabe]

My guess would be a sticking thermostat, or a bad viscous fan clutch or the ac electric fans not working.

Step 1. Turn on the AC, the electrict fans should come on.
Step 2. Try a new Thermostat. Cheap insurance and should be changed every year.
Step 3. Check that viscous fan clucth is engaged when running in hot weather stop and go traffic.

Good luck.
By the way I listed these in order of expense.
The fan clutch being the last place to spend the money as it's very expensive.

GG

 

[jimjet]

just change the radiator and thermostat at same time and i promise your problem will be solved.
dont mess around.
been there done that.
click my signature and see what i have been through.

jim

 

[96discoI]

or just clean between your engine rad and your a/c rad. get all of the junk out of the fins and replace your t-stat if the water boiled over...golden advice- take it or leave it.

 

[sedat]

I think in almost a decade the fuckers either fixed or crushed into new kias by now.

 

[LRflip]

this guy is on a crusade to save all the radiators!

 

[Tysmagic]

 

[singingcamel]

I have an overheating problem. Hoping someone here can be of assistance.
Yesterday my 98 Disco overheated, (not to the red, but close) and the coolant in the reserve tank was boiling. I replaced what spilled with fresh fluid and it was fine. I chalked the overheating up to the hot Chicago weather lately. Today the g-friend calls and it was overheating again and had leaked some fluid. (She was short on details). My question is this. Would a stuck thermostat cause the fluid in the reserve tank to boil or could this not be it. I am trying to remember how the coolant flows through the engine and if this makes sense.
Thanks,
DM

Check out 96disco1 and your troubles are over my friend.
Read closely , quite technical..

 

[LRflip]

Thank you.

 

[LRflip]

Also, you can't call your own statements "Golden Advice".

 

[RoyLuke]

I had a troublesome overheat problem when I R&R the water pump. I replaced everything trying to solve the problem--no luck. It appears the radiator get clogged up over time as the water pump volume decreases. The new water pump was more than the radiator could handle. I got on ebay and found a new radiator--works perfectly.
Roy

 

[ChrismonDA]

My guess would be a sticking thermostat, or a bad viscous fan clutch or the ac electric fans not working.

Step 1. Turn on the AC, the electrict fans should come on.
Step 2. Try a new Thermostat. Cheap insurance and should be changed every year.
Step 3. Check that viscous fan clucth is engaged when running in hot weather stop and go traffic.

Good luck.
By the way I listed these in order of expense.
The fan clutch being the last place to spend the money as it's very expensive.

GG

I had a 98 that never overheated, and yes on my DII when you turn on the A/C the fans engage but that never occurred on my 98. I was thinking the fans were bad but they were working fine but they never engaged. I always wondered about that. The fan clutch is not expensive go to Summit racings web site you can buy a clutch for 57 bucks plus shipping. I have bought one and no problems.

 

[jkempf]

My guess would be a sticking thermostat, or a bad viscous fan clutch or the ac electric fans not working.

Step 1. Turn on the AC, the electrict fans should come on.
Step 2. Try a new Thermostat. Cheap insurance and should be changed every year.
Step 3. Check that viscous fan clucth is engaged when running in hot weather stop and go traffic.

Good luck.
By the way I listed these in order of expense.
The fan clutch being the last place to spend the money as it's very expensive.

GG

Why would the thermostat need to be replaced every year?

If it is overheating without the AC on then feel the radiator when running normally. You can normally tell if it is warm across it's entire surface area. If you coolant is not being consumed then go after what isn't flowing air or water. If the thermostat is stuck most likely the radiator won't be hot to the touch. Most cooling problems start with air flow problems first that creep up over time. Catastrophic changes in cooling performance are normally bad if the coolant isn't coming out on the ground. Not sure if it happens to Rovers but I have other cars that spin the impeller on the waterpump drive shaft and you can diagnose yourself to death and never find it. I had one waterpump fail by shearing the shaft between the bearing and seal clean which spit the belt and left the fan in place. Never seen that before and it was a real British part that I put in myself. Tough part of cooling issues is catching it doing it.

 

[p m]

you guys do realize that our NorCal radiator enthusiast was responding to a 9-year-old thread?

 

[jhmover]

:rofl:

 

[hks3sgte]

you guys do realize that our NorCal radiator enthusiast was responding to a 9-year-old thread?

But did you clean between the engine rad and your a/c rad? Golden advice- take it or leave it.

 

[p m]

But did you clean between the engine rad and your a/c rad? Golden advice- take it or leave it.

I wanted to take it badly, but haven't found stuff in these intimate places after four radiator swaps on different trucks...

 

[aliastel]

Ever notice how many times the advice for overheating is to replace everything BUT the radiator? My favorite is the advice to just add electric fans. . .