1991 Cadillac Allante Spark Plugs

Asked by Jul 20, 2011 at 04:50 PM about the 1991 Cadillac Allante Base Convertible

Question type: Maintenance & Repair

How do you change the spark plugs, on the rear of the engine??

5 Answers

You have to remove the intake manifold at the top of the engine.........

265

My understanding is that the engine cradle has to be loosened and lowered to gain access to the rear plugs. I have never heard of having to remove the intake manifold for access. While neither option is great, lowering the engine eliminates the need for a new intake manifold gasket, proper torque sequencing of the intake manifold bolts, etc.

3 of 3 people found this helpful.
635

PUT IT UP ON A LIFT ACCESS IS SIMPLE.......AAACAR

1 of 1 people found this helpful.
7,835

on my 89 Riviera, i was lucky enough NOT to need to tilt the cradle. i just used a deep socket and 3/8 drive ratchet but that was a 3.8L V6. V8 could be a different story. those years had more space than 2000 model years.

70

You will be able to get to the # 2 and #4 plugs from underneath the vehicle. It requires a lot of patience and long skinny arms, both of which I lack. lol

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