Refitting Thermostat to 3.5iV8 - S1 Disco

[Milhouse]

Hi there,

I am in the process of fitting a new radiator and pulled out the thermostat to let me flush the old coolant out of the system. Now I need to put it all back together! The gasket that was between the engine and the thermostat housing was glued in with blue gunk. Now I realise that I should have got a new gasket before having an undrivable vehicle (hindsight is a wonderful thing!) but what do you recommend - pop into supercrap and get some sealastic or somesuch or what - I doubt that they will have the relevent gasket in stock (but fingers crossed). I checked the thermostat and it appeared to function ok - the RAVE cd mentions a jiggle pin/vent hole - is this only on the 3.9 cos I'm not sure what it means - there doesn't appear to be one anyway! Anything else I should think of whilst the radiator is out? Any other tips?

Cheers

Steve

[PhilipA]

All new TRIDON thermostats will have a couple of multifit gaskets with them.
I recommend that you go and buy a new thermostat anyway seeing they are only about 15bucks, and one of the gaskets will fit.
Regards Philip A

[loanrangie]

All new TRIDON thermostats will have a couple of multifit gaskets with them.
I recommend that you go and buy a new thermostat anyway seeing they are only about 15bucks, and one of the gaskets will fit.
Regards Philip A

And make sure you get a t/stat with the vent (jiggle pin) i went to replace a t/stat with a newy that didnt have one and ended up putting the original back in - easier to bleed the air out if it has one.

[p38arover]

And make sure you get a t/stat with the vent (jiggle pin) i went to replace a t/stat with a newy that didnt have one and ended up putting the original back in - easier to bleed the air out if it has one.


Or you can drill a 1/8" or 3mm hole in the thermostat.

Also put the hole at the top. It's a pig of a job getting the damn thermostat to stay in place while you get the housing back on - unless you remove the dizzie (not recommended).

[Blknight.aus]

I usually drill the one way check valve out of the thermostats that come fitted with them.

a gasket is the proper answer but blue goop works and they should have the right one for the rover 3.x L v8 at supercheap.

[coops71]

Or you can drill a 1/8" or 3mm hole in the thermostat.

Also put the hole at the top. It's a pig of a job getting the damn thermostat to stay in place while you get the housing back on - unless you remove the dizzie (not recommended).

Yeah tell me about it. My thermostat dropped down ever so slightly as I was reassembling. It wasnt obvious at the time but after tightening down the housing it leaked slightly. Took me a month to work it out.

[loanrangie]

Or you can drill a 1/8" or 3mm hole in the thermostat.

Also put the hole at the top. It's a pig of a job getting the damn thermostat to stay in place while you get the housing back on - unless you remove the dizzie (not recommended).

Yeah easier to drill the hole as i havent seen many new t/stats with the vent widget in them.

[Milhouse]

Yeah tell me about it. My thermostat dropped down ever so slightly as I was reassembling. It wasnt obvious at the time but after tightening down the housing it leaked slightly. Took me a month to work it out.

Cheers for all the replies.

Its been back together for a while now and I'm still getting occasional leaks from the thermo housing.

I'm guessing this could be my problem too - how do you ensure that the thermostat doesn't drop even a little bit?

Another possibilty is the gasket - supercheap sold me a pre cut tridon one but I now think that could be for the 3.9 not the 3.5 - I bought another from a different branch and it is a big square one that needs cutting to size...

Steve

[Blknight.aus]

Generally what I do is put the gasket in place with hylomar 3 and then insert the thermostat, if you let the gasket set in place for a while it will stay and offers just enough resistance to the thermostat to stop it from dropping.