Cadillac Northstar Backfire . Cadillac Forums is the perfect place to go to talk about your favorite Caddys including the ATS, CTS, SRX and...

Cadillac Northstar Backfire

Cadillac Northstar Backfire. Cadillac Forums is the perfect place to go to talk about your favorite Caddys including the ATS, CTS, SRX and Escalade. Throughout its run the Northstar was a Cadillac only engine.

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According to Northstar specialist Cadillac Hot Rod Fabricators (CHRF), the only differences are the intake cams and valvesprings. Throughout its run the Northstar was a Cadillac only engine. The backfire could be as simple as a vacuum leak.

Throughout its run the Northstar was a Cadillac only engine.

The backfire could be as simple as a vacuum leak.

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According to Northstar specialist Cadillac Hot Rod Fabricators (CHRF), the only differences are the intake cams and valvesprings. Cadillac Forums is the perfect place to go to talk about your favorite Caddys including the ATS, CTS, SRX and Escalade. The starter motor on the Northstar engines is underneath the intake manifold,it sits in the valley just above the crank shaft.