Question about 1998 Cadillac Seville
The most common overheating problem with the Northstar engine is a blocked purge line. It's job is to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.
Posted on Oct 15, 2009
Make sure the cooling system is purged of all air in the cooling system,by bleeding the system out.Check to make sure the cooling fans are coming on,and going off,with the ac off.I hope this helps you with the problem you are having.
Posted on Oct 07, 2009
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Posted on Jan 02, 2017
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