# Pontiac Transport coolant leak

**URL:** <https://community.cartalk.com/t/pontiac-transport-coolant-leak/12549>\
**Category:** Maintenance/Repairs\
**Tags:** gaskets\
**Created:** [April 4, 2008, 4:15pm UTC](https://community.cartalk.com/t/pontiac-transport-coolant-leak/12549 "2008-04-04T16:15:16Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ihatepontiac](https://avatars.discourse-cdn.com/v4/letter/i/258eb7/32.png) [@ihatepontiac](https://community.cartalk.com/u/ihatepontiac)\
**Post date:** [April 4, 2008, 4:15pm UTC](https://community.cartalk.com/t/pontiac-transport-coolant-leak/12549/1 "2008-04-04T16:15:16Z")

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I have a 1998 Pontiac Transport which is leaking coolant internally into the engine. I just had the intake manifold gasket replaced, and now the same mechanic says it is a leak in the head gasket. How do I know if the problem truely is the head gasket and faulty installation of the intake manifold gasket?

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**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\
**Post date:** [April 4, 2008, 9:56pm UTC](https://community.cartalk.com/t/pontiac-transport-coolant-leak/12549/2 "2008-04-04T21:56:58Z")

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Do a compression leakdown test. Each cylinder is pressurized and the rate of pressure loss (leakage) is checked. If it’s leaking, chances are the headgasket is bad. A Haynes manual should have the protocol described.