Coolant crossover photos - Page 2

ewill3rd · #16 (**permalink**) 04-13-07, 08:42 AM

Those are just the first 3 steps... LOL.

Oh and what GM loves to do in SI is use hyperlinks to lead to other procedures, which have hyperlinks to lead to other procedures and so on.
So step one could be 100 steps by the time you are done clicking...

I just hope they don't turn out to be leakers.

I could tell you a story about this that would blow your mind.
Not sure if I should. I think GM would get mad at me... shhhh!!

**Ranger** · #17 (**permalink**) 04-13-07, 11:40 AM

Quote:

I just hope they don't turn out to be leakers.

My '03 was leaking (albeit just seepage) at 20K. The repair was long enough to give me a loaner.

codewize · #18 (**permalink**) 04-16-07, 11:59 PM

Ok so he says the part that's leaking is a part that attaches to the front of this on the side towards the front of the car. It has what appears to be a small vacuum canister on the top of it. It's just a small piece that bolts directly to the crossover manifold.

If you need pics I'll get them tomorrow.

ewill3rd · #19 (**permalink**) 04-17-07, 06:49 AM

Not sure... need photo.
Maybe that "vacuum canister" is a vacuum check valve for the AIR system.
Sounds like it could be the water pump cover?
hmmm.

codewize · #20 (**permalink**) 04-17-07, 10:56 AM

Something to do with this part in red. I think he said wher it attaches to the crossover manifold. Sorry about the focus. The camera wanted to lock on the closest subject, the dipstick.

ewill3rd · #21 (**permalink**) 04-17-07, 11:05 AM

Yep, just as I suspected.
That upper part is a check valve for the AIR system, the part below is the water pump cover.
That one is easy, except maybe for the check valve removal. It does have to come off to get the cover off.

codewize · #22 (**permalink**) 04-17-07, 11:44 AM

Can i do it myself? any problems I should be aware of? Whats the secret with the check valve.

ewill3rd · #23 (**permalink**) 04-17-07, 04:07 PM

No secret, it is as simple as removing bolts and replacing a seal if that is all that is wrong with it.
Only takes a couple of hours and some coolant.
Basic hand tools. The nuts on the check valve are hard to reach.
That's it.

codewize · #24 (**permalink**) 04-17-07, 05:40 PM

I have little tiny hands. Good for stuff like this. I just have to confirm that that's where the leak is.

Thanks

AJxtcman · #25 (**permalink**) 04-19-07, 09:36 PM

Quote:

Originally Posted by ewill3rd

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.

That is not bad as the XLR that rolled in today. Fuel door inop. It was fixxed inn about 2hrs. The fuel door release cable and actuator was replaced. The 06+ water pump are great.

8.2liter · #26 (**permalink**) 04-20-07, 04:09 AM

Question for ewill, other than freeze-on-the-floor are there any specific symptoms for this leak? Reason being I have a '03 DES and the DIC reports a check coolant about every 600 miles or about a pint low. Dealer replaced a water pump gasket (no help) and now the surge tank. Now waiting to see what happens. Thanks for all your past post and under hood photography !

AJxtcman · #27 (**permalink**) 04-20-07, 07:03 AM

low coolant message is the #1 complaint for a crossover concern. Most customer do not look at the floor.

ewill3rd · #28 (**permalink**) 04-20-07, 07:08 AM

8.2,
Usually the crossover leaks never hit the ground. They are pretty small and usually evaporate from the engine heat before they leak down to the floor.
Sometimes if you look carefully you can see residue or a puddle on top of the transmission, over behind the engine.
If you are underneath you might see some coolant drips where the engine and trans bolt together, but as I said most of the time you won't see anything on the floor.
On an '03 Deville I think there was a bulletin for an updated design cover that is more resistant to thermal cycling. That is probably what they did to your car last time.
The reservoir has a tendency to fail after a cooling system repair.
I get burned all the time, when we fill them up the sensor float dies and the low coolant light stays on. It can be an expensive part and I hate having to make that second phone call to tell someone after they fixed whatever component in their cooling system, now they need a reservoir.