| Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Frequently dirt collects in the lower water jacket, best to open all drain plugs and clean out with a piece of wire that you can wiggle around to clean it out. Probably not the main reason, but contributes. Also contributes to frozen blocks if not open, however, probably not in FL.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
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