| Northstar Performance and Technical Discussion Performance discussions relating to the Northstar System (intake, exhaust, cam, etc.). | Cadillac Forums: Coolant crossover photos 
12-08-05, 11:19 AM
|  | Cadillac Technician Cadillac(s): none | | Join Date: Nov 2005 Location: Alexandria, VA Age: 41 | | | Coolant crossover photos Okay so here are a few photos, I'll see if I can do this right.
Lots of folks have been asking about this type of repair lately so I thought I would snap some photos for clarification.
Without great detail right now, here are some pics of resealing the coolant crossover or "water pump housing".
I'll answer questions when I have time. | 
12-08-05, 11:21 AM
|  | Cadillac Technician Cadillac(s): none | | Join Date: Nov 2005 Location: Alexandria, VA Age: 41 | | | Re: Coolant crossover photos The first picture shows the engine with the crossover removed, you can see it's no party to take off.
the second shows the housing, on the right side you can see where the water pump is housed. I'll take a quick pic of the pump from the other side in a few mins.
The third is to show you what happens to cause the leak.
The inner framework of the gasket fails and there is nothing to keep pressure on the seal part (blue).
The gasket collapses inwards and coolant can get past.
I'll add a pic of a new seal so you can see what a good one looks like.
I gotta get back to work. This one has to be ready tomorrow. | 
12-08-05, 11:25 AM
|  | Cadillac Technician Cadillac(s): none | | Join Date: Nov 2005 Location: Alexandria, VA Age: 41 | | | Re: Coolant crossover photos Okay, reeeeeaaal quick.
Here's the pump with the cover removed so you can see how it fits in there.
Also this is an updated crossover seal. It's white with a black seal lip rather than black with the blue. | 
12-08-05, 01:01 PM
| | Cadillac Owners Member Cadillac(s): White Diamond '03 DHS | | Join Date: Jun 2004 Location: Woodstock Ill. Age: 61 | | | Re: Coolant crossover photos Great pics, Thanks. Hope I never have the need to do it. Don't look like fun.
I moved it to the Northstar & Tech Tips sections where I thought it was better suited. | 
04-10-07, 11:58 PM
|  | Cadillac Owners Master Cadillac(s): 1989 STS / 2001 DTS / 2002 DTS | | Join Date: Apr 2005 Location: Upstate NY | | | Re: Coolant crossover photos Ughh no that doesn't look like fun at all. And I thought it was going to be something easy.
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Corsa exhaust Sportwing Spoiler Semi-custom interior Custom quad Hi-Beams Future Plans: More interior work. Memberships: National and regional Cadillac & LaSalle Club Proud Volunteer - Northstar Tuning Project ---------------------------- | 
04-11-07, 09:02 AM
|  | Cadillac Technician Cadillac(s): none | | Join Date: Nov 2005 Location: Alexandria, VA Age: 41 | | | Re: Coolant crossover photos Nope it is really not a party code.
You going to do it yourself?
It can take a novice over 6 hours to do that job. | 
04-11-07, 04:47 PM
|  | Cadillac Owners Master Cadillac(s): 1989 STS / 2001 DTS / 2002 DTS | | Join Date: Apr 2005 Location: Upstate NY | | | Re: Coolant crossover photos What the flat rate that a dealer would charge. I'm not a novice by any means but I also don't like to get into major things anymore. If a dealer can do it in 2 or 3 it might be worth it. | 
04-11-07, 06:00 PM
|  | Cadillac Owners Enthusiast Cadillac(s): 90 Eldo -SOLD-, 98 ETC -SOLD-, 86 XR4Ti Track Car, 07 Ranger | | Join Date: May 2004 Location: Atlanta, GA Age: 27 | | | Re: Coolant crossover photos What year N* is that? I ask because it looks nothing like a pre-2000, different intake manifold, the TB spacer is PART OF the xover!
Holy bad redesign Batman! | 
04-11-07, 08:49 PM
| | Cadillac Owners Member Cadillac(s): White Diamond '03 DHS | | Join Date: Jun 2004 Location: Woodstock Ill. Age: 61 | | | Re: Coolant crossover photos It is a 2000+ engine. You can tell by the coil module in the cam cover and the female electrical plug just behind the water pump pulley drive shaft. | 
04-11-07, 09:55 PM
|  | Cadillac Technician Cadillac(s): none | | Join Date: Nov 2005 Location: Alexandria, VA Age: 41 | | | Re: Coolant crossover photos Oh the stories I could tell.
Here is an interesting side note.... on the 2006 and up FWD N* engines the crossover MUST BE REMOVED to replace the water pump.
That's right kids... they changed the pump from a cartridge style that is fed in from the back side and made it a front mount bolt on that goes on the crossover and is sandwiched next to the head. No way to get the pump off without taking the crossover out. | 
04-11-07, 10:40 PM
| | Cadillac Owners Member Cadillac(s): White Diamond '03 DHS | | Join Date: Jun 2004 Location: Woodstock Ill. Age: 61 | | | Re: Coolant crossover photos Quote: |
on the 2006 and up FWD N* engines the crossover MUST BE REMOVED to replace the water pump.
|  Good Lord, have they no sense of decency?  | 
04-12-07, 07:40 AM
|  | Cadillac Owners Connoisseur Cadillac(s): White Diamond 2001 STS | | Join Date: Jan 2003 Location: North Carolina Age: 30 | | | Re: Coolant crossover photos Quote:
Originally Posted by ewill3rd Here is an interesting side note.... on the 2006 and up FWD N* engines the crossover MUST BE REMOVED to replace the water pump.
That's right kids... they changed the pump from a cartridge style that is fed in from the back side and made it a front mount bolt on that goes on the crossover and is sandwiched next to the head. No way to get the pump off without taking the crossover out. | Oh my GOSH, why would they do that...??  | 
04-12-07, 08:22 AM
|  | Cadillac Technician Cadillac(s): none | | Join Date: Nov 2005 Location: Alexandria, VA Age: 41 | | | Re: Coolant crossover photos Here are some highlights from the pump replacement procedure. Quote:
Remove the water pump housing. Refer to Coolant Crossover Pipe Replacement .
Remove the water pump cover bolt/studs.
Remove the water pump cover.
| | 
04-12-07, 11:49 AM
|  | Cadillac Owners Connoisseur Cadillac(s): White Diamond 2001 STS | | Join Date: Jan 2003 Location: North Carolina Age: 30 | | | Re: Coolant crossover photos How bizaare! | 
04-12-07, 06:01 PM
| | Cadillac Owners Member Cadillac(s): White Diamond '03 DHS | | Join Date: Jun 2004 Location: Woodstock Ill. Age: 61 | | | Re: Coolant crossover photos WOW! Only 3 steps. Easier than I thought.  | | Cadillac Discussion Tools | | |
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