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Discussion Topic:
looking for cause of overheating 34
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len47merc |
07-26-2014 @ 4:15 AM
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Senior
Posts: 1165
Joined: Oct 2013
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Bill Brown - did you find the smoking gun?
Steve
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CraigTerry |
07-26-2014 @ 5:13 AM
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Member
Posts: 22
Joined: Jun 2014
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Roger that - thanks
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TomO |
07-26-2014 @ 7:21 AM
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Senior
Posts: 7243
Joined: Oct 2009
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Prestone and other ethylene glycol anti-freeze solutions will foam in a cooling system that is not pressurized. Sierra or propylene glycol solutions foam less. Foaming will force the coolant out of the overflow. If you are losing significant coolant from the overflow, install the 3# pressure relief valve sold by Skip Haney or change to water with a rust inhibitor and a surfactant like Water Wetter during the driving season. The water solution will cool better than a mixture of anti-freeze and water. Bill, the compression readings, except for the 86 all seem normal. I would do a wet check on that cylinder to see if it is rings or a valve not seating. I would expect a lower reading if the head gasket were blown. Tom
This message was edited by TomO on 7-26-14 @ 7:22 AM
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CraigTerry |
07-26-2014 @ 7:44 AM
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Member
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Joined: Jun 2014
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Thanks Tom
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carguy |
07-26-2014 @ 8:21 AM
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New Member
Posts: 167
Joined: Oct 2009
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Again, thanks to all who responded with ideas. Flathead47 suggested using Cascade All in 1 dish washing detergent and recently here, in another thread, there was discussion about using Evaporust to remove rust from your cooling system. Both of these sound like great ideas if for no other reason because they are easy to do but, possibly it's because I'm old and/or just skeptical but it has been my experience in the past that the "Mechanic in a can" fixes seldom do what the advertise to do, and sometime cause even more problems. I'd love to have some additional comments from others that have used either of these techniques.
Bill Brown '34 Cabriolet
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