Location of core/freeze plugs between firewall and engine diagram.
Jan 27, 2020 at 11:34 PM
Core plug leaking
2004 PONTIAC GRAND PRIX
JAMES BROOKS
- MEMBER
- 1 POST
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ASEMASTER6371
- ✓ASE Certified Mechanic
- 52,796 POSTS
Good morning,
Tough question.
There are 3 core plugs on the block. There are plugs in the cylinder head at the front and back as well as by where the exhaust manifold bolts to the head. There is also one behind the block between the engine and transmission that would require removal of the transmission to access.
If you have one leaking, it is recommended to replace all of them as the cooling system has rotted them from the inside from rust in the system.
This is a labor-intensive job.
Roy
Tough question.
There are 3 core plugs on the block. There are plugs in the cylinder head at the front and back as well as by where the exhaust manifold bolts to the head. There is also one behind the block between the engine and transmission that would require removal of the transmission to access.
If you have one leaking, it is recommended to replace all of them as the cooling system has rotted them from the inside from rust in the system.
This is a labor-intensive job.
Roy
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Jan 28, 2020 at 2:25 AM
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