If your coolant is leaking, chances you have the head bolts pulling, a common problem on northstar engines. Dealer head bolt inserts don't work, they will tell you that, and no guarantee. The only 100% success rate fix would be " NS300L ". These are longer head bolts and inserts. You can find them on the web, and on Ebay.
How to change the ect on the northstar engine
visual of head bolts on 1999 northstar
Northstar engines were first installed in 1993 model year cars. The first version of the Northstar engine was produced from 93-99. The engine was redesigned in 2000
Depending what make it is; Deville has a 4.9 (V8). Deville Concours 4.6 (V8)Northstar engine. Eldorado has the 4.6 (V8) Northstar engine. Fleetwood 5.7 (V8) Seville 4.6 (V8) Northstar engine.
The engine will overheat and the pistons will seize.
With aggressive preventive maintenance (i.e. never let it overheat) 225,000+ luxurious miles. If you abuse or ignore a Northstar you'll be looking at $1600+ headgasket job. If you want post-warranty "manufacturer defect" service/replacement, buy a BMW or Mini.
Cadillac Northstar is a a type of motor car engine produced by the American compant Cadillac. Northstar engines can be found in Cadillac garages and via online websites.
what procedure??
how can you tell if you need a radiator in a 99 cadillac northstar engine
I don't believe there are any 93's with the northstar engine. If there are the answer is no, the location is different. Starter is under the intake manifold on Northstar and it is in the front of the engine under the exhaust maniold on the 4.9 litre engine
Remove with gearbox and suspension. Split off theengine from the subframe and gearbox. A northstar engine in an eldorado or Seville can be removed in four hrs.
In a word, no. The Northstar engine is a DOHC 4 valve-per-cylinder engine, while the LSx is a traditional pushrod engine. The ports of the northstar are wider to accommodate 2 intake valves, the ports on an LS are narrower and tall feeding a single, large intake valve. The heads on a Northstar are wider and therefore the valley is narrower. The starter on a Northstar is located in the valley. All of these attributes dictate the design of the Northstar intake manifold which, looking similar on top, is very different than an LS manifold on the bottom.