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Old 2006-07-04, 15:29   #1
mean_maverick
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302 engine block drain plug/freeze plug...???

i kept noticing a slight amount of coolant gone from the radiator after a couple of days of sitting, well since im off for the 4th i thought i would just get outside and enjoy the day tinkering with the car. well, i found out where the water was going....(and i also think this is the main part of my overheating problem)

there's a hole on the driver's side of the block, near the back that was leaking. i took my header off of that side and put a small screwdriver in it and all kinds of 'gunk' came out. i cleaned the hole out ad everything and i went to put a 1/2" freeze plug in it only to notice that it didnt fit right. so i thought it might have been a threaded hole so i tried a threaded plug... no luck. it doesnt look like there are any threads in the hole.

so here's my question, does anyone on here know if this is a threaded or non-threaded hole. and maybe what size plug i need to get for it...? any help on this matter would be greatly appreciated
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Last edited by mean_maverick; 2007-05-17 at 20:54.
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Old 2006-07-04, 16:30   #2
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not threaded. did u get out all of the old freeze plug? hole must be clean. go get a rubber expansion type plug u put it in the hole and tighten the nut to expand the rubber plug. i forget if u need 1 1/2 or 1 5/8 inch size. these are much easier than trying to drive in a freeze plug in a cramped space. ive had 1 in my motor for 3 yrs now
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Old 2006-07-04, 16:45   #3
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That hole to the right of the brass freeze plug looks like a block drain. I think it is supposed to be 1/4" pipe thread.
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Old 2006-07-04, 17:19   #4
71gold
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why do the pics. have an 8/01/2005 date ...frank...
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Old 2006-07-04, 17:37   #5
mean_maverick
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i've never set the date one the camera .... and yes, im referring to the small hole in the pictures BESIDE of the brass freeze plug.
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Old 2006-07-04, 17:41   #6
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That hole is threaded in my block and has a pipe plug in it. Not sure why yours doesn't look that way? The rubber expansion plug may not be a bad idea if you can find one the correct size. Good luck!
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Old 2006-07-04, 18:55   #7
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sorry. thought u meant the freeze plug hole. drain hole is usually 1/4 npt. try a cleanout tap and a new plug.
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