Cooling issue

Author
Discussion

xover

Original Poster:

340 posts

166 months

Monday 18th September 2017
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Neither of the radiator fans are spinning and the radiator is only half full. I have always had the half full issue even after replacing it, please advise on how I can troubleshoot this.

xover

Original Poster:

340 posts

166 months

Tuesday 19th September 2017
quotequote all
Thanks a lot for this.

Should had mentioned that the the engine temp needle hit the top and the alarm started to sound.

I will check all those things you suggested.

xover

Original Poster:

340 posts

166 months

Tuesday 19th September 2017
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You replaced this for me in 2014 along with a fan motor. Do they not last long?

xover

Original Poster:

340 posts

166 months

Tuesday 19th September 2017
quotequote all
It's not going to hurt to try

xover

Original Poster:

340 posts

166 months

Tuesday 19th September 2017
quotequote all
mfp4073 said:
Remove the radiator cap, set the heater to it highest temp, then start the engine. Allow the engine to slowly come up to operating temperature. Keep an eye on the coolant level and top it up as required. Replace the radiator cap with a new one and hopefully that will sort the problem out.
If that does not work, I would be looking for a kink in one of the coolant pipes, or maybe a restriction in a pipe somewhere.
The only other thing I can think of is maybe there is a problem with the actual heater valve which is located on the drivers side adjacent to the inner wing. If I any doubt I would also replace that as well.
I believe radiator caps were around £12 and heater valves about £40 ?,
The fact that the radiator fans do not come on could be a faulty relay, a fuse or broken wire, or temp sender.
I would sort out out the coolant level first, you might then find the fans then start to work when system is filled correctly and everything comes up to temperature. Don't forget the fans won't operate unless the engine gets really hot.

I hope that gives you something to work with.

John


Edited by mfp4073 on Tuesday 19th September 08:06
Do I fill it to the top once it's heated up to temperature at idle and then put the lid on and see if it leaks to test the cap?

xover

Original Poster:

340 posts

166 months

Wednesday 20th September 2017
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It looks like the coolant is leaking out of the plastic shaft on the left side when facing the car. There is a pool on the floor when I checked my car this morning after doing the testing yesterday. The levels had stayed ok, but when I checked it this morning it was right down again.

The fans are actually working, as you said it has to be really hot before they come on, so that isn't so bad.

I actually found that when I heated it up the level went up opposed to down. Is that correct?

Edited by xover on Wednesday 20th September 11:39

xover

Original Poster:

340 posts

166 months

Wednesday 20th September 2017
quotequote all
So when the engine is cold should it be filled to the top because I found that when I heated it up the fluid started rising to the top so I just put the cap on.

xover

Original Poster:

340 posts

166 months

Thursday 21st September 2017
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I replaced the radiator 15k ago and the cap a second tine, pressure tested the radiator today, seems ok, the mechanic thinks it's leaking through the head gasket. Anyone had this issue before ?

Edited by xover on Thursday 21st September 14:22


Edited by xover on Thursday 21st September 14:32

xover

Original Poster:

340 posts

166 months

Thursday 21st September 2017
quotequote all
It sits around in the car park. I've done 25k in 7 years. Occasional weekly short trip and then 200mile round trips a few times per year. It's NA except for the air filter and full exhaust. No cam or FI.

Mechanic was saying that it is burning oil as there's black sludge in the exhaust, is that a correct analysis? I do notice grey smoke under heavy acceleration, can't tell if its blue or white though, more white grey than blue grey I would say.

Edited by xover on Thursday 21st September 16:13


Edited by xover on Thursday 21st September 16:14