captmarvin

I'm a new owner of an 84 targa, Platnium metallic, 70,000 miles, elderly original owner only drove 400 miles since 2004. He put new brakes and tires on it before I bought it. It has been in Denver since new. All maintenance done at Porsche dealer. I have all records, including original window sticker. (over $37000).

I changed trans fluid, and engine oil/filter, (Brad Penn 20w50 & Mahr filters) new fuel and air filter. New plugs and plug wires. Replaced crushed hard lines to the brass tube oil cooler with Elephant finned lines. Today, air temp about 95, driving on Interstate 80mph, A/C off, oil temp gauge was steady at about 9:30 to 10:00 position. Is that ok, or is it too high? What else should I check/change to reduce the oil temp? I'll post pictures when I can.

Steve Weiner-Rennsport Systems

Hey Capt,

IMHO, thats too hot, considering the conditions.

I would be concerned that the external oil cooler's thermostat isn't opening all the way. These can be removed and tested in hot water to confirm opening temp and position.

I would also take a good look at the front of the cooler to make sure there are no bugs, grass, or general road debris partially blocking the fins on the cooler.

Amber Gramps

Is there a working fan on the front oil cooler?

https://rennlist.com/forums/911-foru...hlight=oil+fan

captmarvin

The car has the 28 row brass tube cooler, no fan. I cleaned the cooler with high pressure washer
before changing the hard oil lines. The original lines had several dents and smashed areas. I thought
new lines would solve the heating problem.

Thanks for the suggestion, Steve, I'll pull the thermostat and check it. The oil cooler and lines do get hot but possibly the flow is reduced by the thermostat not opening fully.

Ed Hughes

I'd also look under the fan shroud too....rodent nests and such have been found there. Heck, could be a rag left over from a previous repair too. But, Steve suggests the easiest stuff to access for a start.