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Odd-fire 231 Coolant drains

Odd-fire 231 Coolant drains

98wgb663

Jeeper
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Location
Vancouver,wa.
Vehicle(s)
F-150 ford 4x4 Fan of buick/jeep engines
I have a 75 231 that has no coolant drains. I need to know where to drill and tap this engine. I've search google and have found nothing. Help!!! Please!!!
 
I know you specified '75 231 c.i. engine so I will pass along what I know on the 225. The Dauntless Buick 225 V6 engine has two 1/8" NPT plugs on each side of block in between the soft plugs. I installed petcock for easy drain when the time comes.If you have a copy of" V-6 Performance " by Pat Ganahl
you will see the plugs in a couple photos. :) mike
 
Thanks, but some years were not drilled believe it or not. I think I'm going to leave it be and just remove a soft plug to drain. I wish I had of seen it before it when in the vehicle.
 

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