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Old 07-17-2003, 11:52 PM
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Car: 1991 RS
Engine: 305 LO3(TBI)
Transmission: TH-700R4
engine coolant

i need to drain my engine coolant out of my block but i dont know where the drain plug is and was wondering if someone can help me also if you have any pics it would help alot
Old 07-18-2003, 12:15 AM
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Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
Pull out the knock sensor (driver's side IIRC.)
Old 07-18-2003, 12:16 AM
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Car: 1989 IROC-1
Engine: L98
Transmission: 700r4
Shop vac, duct tape and a straw.

Or look on the side of the block, driver's side. Laying on your back you should see it...........

But the shop vac is more fun.
Old 07-18-2003, 12:28 AM
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Car: 1991 RS
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that should drain my block completely correct??
Old 07-18-2003, 12:40 AM
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Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
Originally posted by gruveb
Shop vac, duct tape and a straw.

Or look on the side of the block, driver's side. Laying on your back you should see it...........

But the shop vac is more fun.
I heard those shop vacs really suck!!
Old 07-18-2003, 05:55 AM
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Car: 4
Engine: 6
Transmission: 5
There's one plug on the driver's side that drains that bank, and one on the pass side that drains that side. As was said, the knock sensor does double duty as the pass side coolant drain. The drain holes are just above the oil pan rail.
Attached Thumbnails engine coolant-coolant-drain-hole.jpg  
Old 07-18-2003, 04:08 PM
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Car: 1991 RS
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how do i remove the knock sensor on the passanger side??
Old 07-19-2003, 09:35 PM
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Should be a hex shape on it ....enough to get a wrench on I think...
Old 07-20-2003, 05:51 PM
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On my motor, all the coolant was in the oil pan. Easy to drain the block that way!
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