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Jeff Chambers · 05-09-2002, 06:41 AM

If its a small 1/4NPT allen plug near the front right (passenger) side of the motor just below the heads, then that's a water jacket plug. Very useful for draining coolant before head removal. There's a similar one on the back left that drains the driver's side of the engine. You could try some local heat and penetrating oil but if you end up rounding it off you'll either have to let it go or drill & easy-out it. It'd be tough to try and get enough to grip onto with vise-grips.

05-09-2002, 06:41 AM	#4
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	If its a small 1/4NPT allen plug near the front right (passenger) side of the motor just below the heads, then that's a water jacket plug. Very useful for draining coolant before head removal. There's a similar one on the back left that drains the driver's side of the engine. You could try some local heat and penetrating oil but if you end up rounding it off you'll either have to let it go or drill & easy-out it. It'd be tough to try and get enough to grip onto with vise-grips. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"