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CaddyInfo.com Cadillac Discussion Forum > General Cadillac Help and Discussion > Cadillac Discussion Forum |
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 May 6 2009, 01:04 AM
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#1
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 CaddyInfo Reader  Group: Supporter Posts: 781 Joined: 20-January 04 From: Sweden Member No.: 56 2002 STS Northstar 4.6L V8 (LD8/L37)  |
Hi!
I bought a used radiator for my 2002 STS. The one I found was from a -00 STS. I was planning to replace it last weekend but I discovered that it had an extra connection (Ø10.5 mm / ~13/32" on the right side, perhaps it is for a water-cooled alternator? Besides that the radiators looked the same so the obvious question is if anyone knows if they are the same besides the "extra" pipe? We all benefit from shared knowledge, and we would love to have you participate fully. Registration is free. As a Registered Reader you can Post, Reply, Search, and more! |
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May 6 2009, 03:05 PM
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#2
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 Enthusiast (250+ posts)  Group: Registered Posts: 274 Joined: 8-July 06 From: Central Texas (Austin area) Member No.: 3770 1987 Coupe DeVille 4.1L OHV V8 |
Going by part numbers only: the # for the 2000 is different than the # for the 2002. The 2000 # fits '98-00 models and the 2002 # fits 01-04 model years.
-------------------- GM Reman 4.1 engine Dec '08
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 May 7 2009, 02:10 AM
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#3
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CaddyInfo Reader Group: Supporter Posts: 781 Joined: 20-January 04 From: Sweden Member No.: 56 2002 STS Northstar 4.6L V8 (LD8/L37) |
QUOTE (Dave S @ May 6 2009, 11:05 PM)  Going by part numbers only: the # for the 2000 is different than the # for the 2002. The 2000 # fits '98-00 models and the 2002 # fits 01-04 model years. Hmm, it looks like it is the same except from the extra connection. I have the extra coolant capacity option i.e. engine oil cooler/automatic transmission cooler. The 2002 radiator has a molding at the location where the extra connection is on the 2002 radiator. I guess I'll have to try and see! My radiator seems to have been taking some beating..propably from a service. I didn't want to buy a new one because the $$$ involved. The only used one with a fair mileage on it was this one (also an extra coolant capacity cooler). Didn't think there were changes made between 2000-2002. |
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May 7 2009, 05:43 AM
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#4
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Enthusiast (250+ posts) Group: Registered Posts: 274 Joined: 8-July 06 From: Central Texas (Austin area) Member No.: 3770 1987 Coupe DeVille 4.1L OHV V8 |
Some photos of what you are describing might be helpful.........
-------------------- GM Reman 4.1 engine Dec '08
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May 7 2009, 06:26 AM
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#5
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 Regular (100+ posts) Group: Registered Posts: 119 Joined: 28-September 08 From: Columbus, OH Member No.: 9327 Cadillac STS 2000 NORTHSTAR 4.6L V8 VVT (LH2) |
You can try plugging the connection that you dont need with some hardware at your local hardware store. Just make sure the threads match.
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May 7 2009, 09:09 AM
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#6
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CaddyInfo Reader Group: Supporter Posts: 781 Joined: 20-January 04 From: Sweden Member No.: 56 2002 STS Northstar 4.6L V8 (LD8/L37) |
QUOTE (SPreston2001 @ May 7 2009, 02:26 PM) You can try plugging the connection that you dont need with some hardware at your local hardware store. Just make sure the threads match. I'll try that. My work takes all my time at the moment (IMG:style_emoticons/default/sad.gif) |
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May 7 2009, 09:13 AM
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#7
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CaddyInfo Reader Group: Supporter Posts: 781 Joined: 20-January 04 From: Sweden Member No.: 56 2002 STS Northstar 4.6L V8 (LD8/L37) |
QUOTE (Dave S @ May 7 2009, 01:43 PM) Some photos of what you are describing might be helpful......... I'll take some pictures, but the main question still remains. Are the radiator a direct swap except from the odd connection that needs to be plugged? I can't see any reason why the fittings shouldn't have the same dimensions 1998-2004 (i.e for the tranny and engine oil end tanks) but many times reason has nothing to do with the real world (IMG:style_emoticons/default/wink.gif) I was hoping that someone here could tell me what that extra connection is for and if the radiator fittings have the same dimensions. I could order a new one from the states even a none OEM one, but I prefer OEM and that would cost me about 700$..versus this one with 50000 miles on it and a 300$ price tag. |
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May 7 2009, 09:36 AM
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#8
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CaddyInfo Reader Group: Supporter Posts: 781 Joined: 20-January 04 From: Sweden Member No.: 56 2002 STS Northstar 4.6L V8 (LD8/L37) |
I have FSM:s for quite a few years for Cadillac Seville among others on CD (IMG:style_emoticons/default/ninja.gif)
This is thanks to a friend on the Swedish sub-forum who luckily found a CD on E-bay! (IMG:style_emoticons/default/smile.gif) I verified that the extra connection is for the water-cooled generator on earlier Sevilles but unfortunately the fitting dimensions aren't mentioned for the other connections, beeing a mechanical engineer I obviously assume that they are the same, no reason for other dimensions over the years with the same engine and transmission right?...but I really would hate to have the car apart just to discover that those been-counters saved a dime making something smaller etc..this is the main reason I'm asking. |
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May 7 2009, 09:37 AM
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#9
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CaddyInfo Reader Group: Supporter Posts: 781 Joined: 20-January 04 From: Sweden Member No.: 56 2002 STS Northstar 4.6L V8 (LD8/L37) |
And please don't tell me to buy the right one (IMG:style_emoticons/default/wink.gif)
I'm always very adamant with that on the Swedish sub-forum, buy right parts..and here I am..well (IMG:style_emoticons/default/wink.gif) |
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May 10 2009, 08:14 AM
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#10
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CaddyInfo Reader Group: Supporter Posts: 781 Joined: 20-January 04 From: Sweden Member No.: 56 2002 STS Northstar 4.6L V8 (LD8/L37) |
Haven't spent a lot of time with my wife lately so the radiator change is postponed to next weekend. I realise that my question is a tough one but next weekend we'll have the answers! A worst case senario would be to change the radiator end tanks between the radiators but that would also include new gaskets to the end tanks.
I'll keep everyone updated! |
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May 10 2009, 08:23 AM
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#11
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 I Love My Cadillac Group: Supporter Posts: 2152 Joined: 16-June 06 From: Ft. Worth Tx Member No.: 3613 06 DTS Performance Sedan Northstar 4.6L V8 (LD8/L37) |
QUOTE (Jan Olsson @ May 10 2009, 08:14 AM) Haven't spent a lot of time with my wife lately so the radiator change is postponed to next weekend. I realise that my question is a tough one but next weekend we'll have the answers! A worst case senario would be to change the radiator end tanks between the radiators but that would also include new gaskets to the end tanks. I'll keep everyone updated! Please do keep us updated. I have been following this, and I am interested in the outcome. -------------------- |
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May 10 2009, 09:54 AM
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#12
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Enthusiast (250+ posts) Group: Registered Posts: 274 Joined: 8-July 06 From: Central Texas (Austin area) Member No.: 3770 1987 Coupe DeVille 4.1L OHV V8 |
Haven't spent a lot of time with my wife lately so the radiator change is postponed to next weekend.
******************************** Hmm......priorities -------------------- GM Reman 4.1 engine Dec '08
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May 10 2009, 10:33 AM
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#13
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CaddyInfo Reader Group: Supporter Posts: 781 Joined: 20-January 04 From: Sweden Member No.: 56 2002 STS Northstar 4.6L V8 (LD8/L37) |
QUOTE (Dave S @ May 10 2009, 05:54 PM) Haven't spent a lot of time with my wife lately so the radiator change is postponed to next weekend. ******************************** Hmm......priorities Well the radiator leaks about 1/4 of a gallon/months so it is really no hurry but I still want to be on the safe side. Wifey though needs immediate attention (IMG:style_emoticons/default/tongue.gif) |
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May 10 2009, 12:01 PM
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#14
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Enthusiast (250+ posts) Group: Registered Posts: 274 Joined: 8-July 06 From: Central Texas (Austin area) Member No.: 3770 1987 Coupe DeVille 4.1L OHV V8 |
I'm hip....
-------------------- GM Reman 4.1 engine Dec '08
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May 17 2009, 03:07 AM
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#15
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CaddyInfo Reader Group: Supporter Posts: 781 Joined: 20-January 04 From: Sweden Member No.: 56 2002 STS Northstar 4.6L V8 (LD8/L37) |
An update on the radiator replacement! First of all this wouldn't be a thread at all if I had bought the right radiator but I thought I'd try anyway. Yesterday I started the change but it seems I have to make a halt because I can't get the oil cooler lines loose. They are stuck with rust...I'll give it one more shot then if it doesn't work I'll have to cut the lines and order new ones (or a set of used ones).
The work will hopefully continue at Thursday next week... |
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