Cool runnin's
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stig

Original Poster:

11,823 posts

313 months

Saturday 8th July 2006
quotequote all
Just a quickie.

Replaced my rad fan switch today. Turns out the factory supplied one was 98/93. Given that you get some heat loss between the engine and the rad (conduction via the long ally pipes etc.), no wonder the fans weren't coming on 'til close to 100 degs.

Replacement is a 92/87.

In traffic, with fans running, temps didn't get past 91

I went out for a 10 minute test drive, came back an hour later. It's a different car being able to just drive it without dial watching!

Treated the old (new) girl to a double polish and wax session and she's absolutely gleaming. Auto Glym polish and gloss, with a 100% carnauba Harly wax topcoat (belt and braces I suppose but a hell of a lot of buffing!). I was amazed at the difference. The mirror finish almost looks wet it's so good.

Happy days

steve_d

13,802 posts

287 months

Saturday 8th July 2006
quotequote all
Did the factory say the 98/93 is what they always supply?
Do you have a part number/supplier for the new one cos I suspect a number of us will be heading that route.

Steve

Storer

5,024 posts

244 months

Saturday 8th July 2006
quotequote all
Most modern cars with temp guages sit at 90 degrees (and never move) so any rad fan switches set at more than this may be a major contributor to your problems.
Cheap fix if this 98/93 degree sender is the factory standard fit and a 92/87 is the cure.

stig

Original Poster:

11,823 posts

313 months

Saturday 8th July 2006
quotequote all
To clarify, I use a Stack which (I think I'm safe in saying) is a bit more accurate than the factory analogue guages.

Steve - Intermotor part no. 50200. Originally from an Alfa Romeo IIRC. 22m thread with 2 spade connectors, so it's a straight swap (with wet feet )

I had asked the factory what the standard switch was and they said 95/90, so dunno if they're all the same or I had a 'high' one?

steve_d

13,802 posts

287 months

Saturday 15th July 2006
quotequote all
stig said:
To clarify, I use a Stack which (I think I'm safe in saying) is a bit more accurate than the factory analogue guages.

Steve - Intermotor part no. 50200. Originally from an Alfa Romeo IIRC. 22m thread with 2 spade connectors, so it's a straight swap (with wet feet )

I had asked the factory what the standard switch was and they said 95/90, so dunno if they're all the same or I had a 'high' one?


Bought and fitted the 50200 switch today.

The one I took out is marked 110. Ouch!!

Don't think i'll even leave that in my 'come in handy' box.

Steve

stig

Original Poster:

11,823 posts

313 months

Saturday 15th July 2006
quotequote all
Blimey! Sounds as if you'll be seeing the fans on more often then

Went for a nice run today in mine. No problem with cooling, however, am now having trouble with idle speed (stuck at 1200rpm). The butterflies seem to be sticking open. Even if I back the idle screw right off so that it's not even touching the mechanism, they won't fully close?

Also, I noticed on these butterflies that they have a bleed hole drilled in them - don't remember that on the GTR. Is it common?

steve_d

13,802 posts

287 months

Sunday 16th July 2006
quotequote all
Right, caught in traffic when coming back from Goodwood.
Fans came on when Stack indicated 89 but temp then reached 92 and stayed there.
Engine bay went to 68.

Steve