A930Rocket

I've cross posted this on the 911 Turbo forum.

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Is the external oil thermostat rebuildable on a '87?

Mine seems to let oil flow to the front oil coolers and back to the thermostat, but then seems to stop there and not get back to where it needs to.

My temps today were about 190F in mid 40F temps just cruising around.

At the track, the fan never comes on, but it does get up to about 220F on summer days.

The funny part is that I have a manual over ride switch for the fan with a light to know when it's on. Well, I don't turn it on, but sometimes the light comes on any way at the track?

Any help/ideas appreciated.

Jim

Alan G.

They are rebuildable but for the little money that you save it is probably better to replace it. The biggest hump about the job is that the thermostat body is alluminum and the lines fittings are brass. Due to galvonic action a couple of the aluminum fittings will probably get boogered, and the T-Stat will be junk anyways.

A930Rocket

Thanks Alan,

I was just looking online and saw where Vertex has them new for about $249. I'll probably buy one based upon one more test.

Jim

Alan G.

I got mine at Vertex. You need a couple of big wrenches.
I had to use an oxy/acet torch to heat mine up to get them loose. That in itself is a little tricky to do without burning up the undercoating. I used some stone tiles to protect the car.