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[Andy H]

For 40 years I have thought that Quinton Hazell were part of GM/Vauxhall. Seems I was wrong.....

If the thermo-capsule is made to the same tolerances as the GM component then why not? QH have been making wax thermostats for about 60 years so they should be able to get it right.

Let us know how you get on. I didn't enjoy paying the best part of £50 for a new housing & insert when there was nothing wrong with the old housing.

[Dave Elite]

For 40 years I have thought that Quinton Hazell were part of GM/Vauxhall. Seems I was wrong.....

If the thermo-capsule is made to the same tolerances as the GM component then why not? QH have been making wax thermostats for about 60 years so they should be able to get it right.

Let us know how you get on. I didn't enjoy paying the best part of £50 for a new housing & insert when there was nothing wrong with the old housing.

Do you think I should go ahead and fit it? I have read another thread and somebody said you cannot remove the stat from the housing? I dont want to strip the engine down over Christmas only to find I cannot fit it.

[Andy H]

The thermo-capsule is held in by a spring and a crosspiece that clips into lugs in the housing.

Push the crosspiece in & turn a quarter turn.

Unfortunately it is a lot of work to get to the thermostat in the first place.

[Dave Elite]

The thermo-capsule is held in by a spring and a crosspiece that clips into lugs in the housing.

Push the crosspiece in & turn a quarter turn.

Unfortunately it is a lot of work to get to the thermostat in the first place.

Sorry I don't understand this bit. Are you saying it is possible or not?

[Dave Elite]

http://www.omegaowners.com/forum/YaBB.pl?num=1171109400/6 Just found this thread. It confirms that the insert can be swapped over if the housing is ok.

[Bionic]

Fit an inline thermostat? Did this years ago and it caused nothing but problems. Eventually bit the bullet and did it the right way. After that it was perfect. Nothing to save moneywise either - the right part costs about as much as the inline thermo, then add the clips and pipe (if you cut the original you will eventually have to buy another whenthe job goes tits up) and you save nothing at all. All you will do is waste your time.
Try it if you must but you would do better heeding the advice already given. That Bast**d bolt is a pain in the ass but a bit of patience is all it takes!
GudLuk

[Andy H]

The thermo-capsule is held in by a spring and a crosspiece that clips into lugs in the housing.

Push the crosspiece in & turn a quarter turn.

Unfortunately it is a lot of work to get to the thermostat in the first place.

Sorry I don't understand this bit. Are you saying it is possible or not?

Sorry, I don't know if it is possible but I would be inclined trust QH to get it right.

I meant to say that it took me a couple of hours before I had the thermostat out. In other cars I have owned or worked on it takes about 10 minutes and so it wouldn't have been too inconvenient to discover that it wouldn't fit.

[Dave Elite]

I'm doing the thermostat now, and I'm at the bastard bolt. I'm using a 10mm spanner on it. I can see why its called the bastard bolt. Any tips?

[Matchless]

Has anybody tried putting an in line hose thermostat on a V6 if the existing thermo is failed open. Would be simple to do but would it work
Ron

Would this work?

I doubt it. The standard thermostat is in the heart of the engine and is exposed to the coolant being pumped around inside the engine. When it is half open some water goes to the rad and some back to the block. When it is fully open the port to the block is closed and all the flow goes to the radiator.

An external one wouldn't know when the engine was hot because it would be in a cold pipe away from the heat source.

Thanks. Is it possible to just replace the stat and not the housing?

The stat insert is a bayonet fit into the housing so in theory you can change just the insert. In practice the stat closes against the alloy housing and wears a groove which is the cause of slow warm-up as cold coolant is able to bypass the stat. Likely to cost more in wasted fuel than a complete housing assy.