1992 3.1L Where is engine block drain?
executive
09-11-2005, 03:42 PM
I have a 3.1L 1992 Pontiac Grand Prix LE.
Are there coolant drain plugs on the engine block, and if so, where?
Thanks
Are there coolant drain plugs on the engine block, and if so, where?
Thanks
executive
09-11-2005, 11:02 PM
Found them.
Front plug bolt is directly underneath the middle cylinder, near the bottom of the engine block, below a freeze plug. Strangely, the bolt heads are an imperial size (9/16" I believe). You will probably need to remove the distributor coils first (3x13mm bolts, 3 electrical plugs)
Rear plug is closer to the driver's side. Access was much easier but you may need to rotate the engine (see Haynes manual). The drain hole was so clogged that initially nothing poured out. A quick run-through with a piece of wire solved that.
Front plug bolt is directly underneath the middle cylinder, near the bottom of the engine block, below a freeze plug. Strangely, the bolt heads are an imperial size (9/16" I believe). You will probably need to remove the distributor coils first (3x13mm bolts, 3 electrical plugs)
Rear plug is closer to the driver's side. Access was much easier but you may need to rotate the engine (see Haynes manual). The drain hole was so clogged that initially nothing poured out. A quick run-through with a piece of wire solved that.
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