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Old 08-17-2017, 09:55 PM   #21
Pilotdave
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Default Re: Leak Down Test Results

Ran a compression test today; warm engine, throttle wide open.

Results: 1,2 4 @ 60 and 3 @ 55.

Thanks for the suggestions on cleaning radiator and testing the coolant. Wondering if some of the tubes may be plugged with sediment vs grease.......that would require having the radiator rodded out, I'm thinking.

Dave
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Old 08-17-2017, 10:21 PM   #22
Tom Wesenberg
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Default Re: Leak Down Test Results

Before having the radiator rodded out, try the vinegar in post #18.

Vinegar removes hard water sediments from coffee pots and steam irons.
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Old 08-18-2017, 01:23 PM   #23
mcorrell
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Default Re: Leak Down Test Results

With those readings I would leave the inside of the engine alone and focus on the radiator
Hopefully yours isn't a cheap 2 row radiator like mine. That is what causes my car to overheat on warm days or at higher speeds

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Old 08-20-2017, 09:19 PM   #24
Pilotdave
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Default Re: Leak Down Test Results

Thanks for the recommendations, guys. I'm planning to watch the coolant level carefully, then try the vinegar treatment after the driving season is over here in New England. I'll report back afterwards.

Thanks, all of you.

Dave
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Old 08-23-2017, 07:59 AM   #25
barkleydave
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Default Re: Leak Down Test Results

When I first got my Truck (remember I am NOT a Model A expert!) I did replace my radiator which solved my Overheat problem. Also I wanted to made sure exhaust gases were not escaping through the head gasket, or crack in head, block or broken studs. The test is easy and inexpensive highly accurate. Just used it at one of our club meetings. The block tester kit is available from NAPA. Special fluid (which reacts to CO ) Remove the radiator cap, Place the vial into the radiator with fluid Run engine warm making sure thermostat is open. You draw air from the radiator into the vial. If fluid changes from blue to green or yellow there are combustion gases leaking into the water jacket and into the radiator. You can further test to determine the location by testing again disconnecting spark plug from #1 retest, #2 etc until it passes or not.
Exhaust gases leaking will force water out of overflows and can cause overheat problems just to mention a few. Most our cars passed but one had a known problem and it confirmed a problem with the head gasket, or warped head etc.
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