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Old 12-18-2017, 05:57 PM   #1
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Join Date: Sep 2013
Location: Redwood city, CA
Posts: 652
Radiator cap

I seem to be losing coolant from the radiator drain /overflow pipe. I presume that the pressure rating of the cap (16) is not sufficient to stop the spring being compressed by pressure when the engine is hot.

Is there a standard pressure for a 350 is a blazer and is mine incorrrect?
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Old 12-18-2017, 10:30 PM   #2
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Join Date: Nov 2009
Location: Parachute, CO
Posts: 183
Re: Radiator cap

16 should be good. Your cap may just be weak. Try a new one. If this don't work. You may want to do a leak down check.
1984 1ton 4x4 crew cab dually 6.2 diesel,465,205,D60,D70,1987 3/4ton 4x4 suburban 5.7 FI350,TH400,208,1985 CJ-7 FI406,465,205,D60,FF14, 1970 Jeepster 350,465,205,D44,FF14,
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