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1998 deville 4.6 northstar engine

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Only you can answer the "worth it" question.

But it is not necesaary to "replace" the engine to deal with a head gasket issue. From were I sit it makes more sense to pay the price for head gasket replacement on your existing engine. The caveat is you must find a shop or independent individual with Northstar experience willing to take the time to do the repair according to GM/Cadillac recommendations. Price can vary from $2,000 to whatever the repair shop owner senses you might be willing to pay.

If you live anywhere near Lake Erie, there is a shop in Southern Ontario that has extensive experience with Northstars and a solid reputation.

But first you must decide the "worth it" question.


Drive your car.

Use your cell phone.


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I would repair the existing engine vs. installing a used engine with unknown history in the car.

'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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I agree, unless you get a used engine with low miles, THEN timesert it, its best to repair your own engine

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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