Cadillac Owners Forum banner

1 - 4 of 4 Posts

·
Registered
2000 Cadillac Eldorado Sport Coupe
Joined
·
90 Posts
Discussion Starter #1
My Eldorado has sprung a very small coolant leak that looks to be an easy fix. The leak is coming from the small rubber hose (one clamp on each end) between the coolant tank and the coolant line that runs under the engine's beauty cover. What is the proper name of this hose? Just curious because the closest dealer is now 20 miles away and I'd rather just order it for wholesale online. Thanks gang!

Joe
 

·
Registered
04 Deville, 11 DTS Premium, 00 Deville (sold), 02 Deville (sold)
Joined
·
2,688 Posts
GMPartsDirect has a pretty good online parts catalog with lots of pictures.
 

·
Administrator
2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
Joined
·
71,003 Posts
If the line looks to be about 5/8" or so, and runs from the fitting on the upper area of the surge tank to a tit on the waterpump area, that's the purge line.

It constantly bleeds a small stream of coolant into the surge tank, thus removing air and gasses from the coolant, which helps to prevent water pump cavitation. The bottom hose of the surge tank sort of "floats" on the system, allowing expanding and contracting coolant to flow to/from the surge tank as needed.
 

·
Registered
1997 ETC (GAVE TO STEPSON 2011), 2000 DTS (RIP)
Joined
·
1,702 Posts
I replaced mine with some fuel line I had laying around - 5/16" I think - did it years ago, no problems since.

If the leak is on the tank side, it might be the tank itself - the nipple cracks and leaks - very common - need to replace the entire tank, in that case. Got mine from gmpartsdirect.com - I think around $75ish. If you do that, you might also want to replace the heater hose size hose that comes off the bottom of the tank
 
1 - 4 of 4 Posts
Top