Cant take much more ! Overheating again and again

**Avrio** · 17th October 2009, 10:27 AM

new radiator , new overflow, new thermostat, seems to last about 3 months in between these incidents of overheating, then bingo it happens again.
I getting close to bailing on my first Disco ..does anyone have a genius mechanic in melbourne preferably north or east ?

Thanks

**defenderkev** · 17th October 2009, 11:11 AM

Is it a tdi? When it over heats is it using water?

If so check around the water pump its pretty common for the tdi to develop a small leak.It took me a while to work out where mine was leaking from.

If your over it try Roverland on Dorset Rd

**Avrio** · 17th October 2009, 11:13 AM

thanks for that its a V8i 1996 .

**spudboy** · 17th October 2009, 12:02 PM

How's the viscous fan?

Check out post #15 on this thread: Disco 1 overheating - help needed

**PAT303** · 17th October 2009, 02:39 PM

Originally Posted by spudboy

How's the viscous fan?

Check out post #15 on this thread: Disco 1 overheating - help needed

With the engine at operating temp put a paint brush against the fan,it shouldn't change speed,if it does you have your problem. Pat

**p38arover** · 17th October 2009, 03:59 PM

It's a 3.9. It's possible you have a slipped liner.

Is it using any water?

If you have a borescope, you could put that down the spark plug hole to look. See if there is water in there or if the piston looks clean (although it might be if the head has been off).

Steam Cleaned Piston

If you pull that head off, run your fingernail over the liner/deck junction. It should be dead smooth. If there is any lip, I'd say the liner has moved.

See these pix I took of a block I have:

Good:

Slipped

Re block pressure testing, see
[ame="http://www.youtube.com/watch?v=C2EyvgxdyRY"]YouTube - Land Rover Engine Block Leak Tester[/ame]

**Avrio** · 19th October 2009, 05:53 AM

And the prize for genius of the week goes to...SPUDBOY ! Not only does the paintbrush stop the fan but i can stop it with my fingers ! Thanks very much - will try Britparts for the new viscous.

Cheers to everyone who took the time to reply

Steve

**spudboy** · 19th October 2009, 08:29 AM

Genuis of the week!!! I'll be telling my missus that

Glad you got the the bottom of the problem.

**p38arover** · 19th October 2009, 08:53 AM

Originally Posted by Avrio

And the prize for genius of the week goes to...SPUDBOY ! Not only does the paintbrush stop the fan but i can stop it with my fingers ! Thanks very much - will try Britparts for the new viscous.

Warning! Do not get an Allmakes VC.

They lock up too much and drag a lot of power. Replacing my near-new Allmakes VC with the genuine item improved the 0-100km/h times by 5 seconds.

**landrover dave** · 19th October 2009, 01:33 PM

If the viscous coupling is good and still getting hot take radiator to a specialist and get it rodded. if you are using anti freeze the glycol deposits in the core creating an insultating coating. A 10% blockage can cut your cooling by up to 25%. I run a corrosion inhibitor that does not have glycol. Y only need only need anti freeze if you are staying in the snow for an extended period. Glycol also eats gaskets and likes to find any leak! Call Dave on 0431300629 for any more info

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