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EFV-8 Club Forum / General Ford Discussion / looking for cause of overheating 34

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Posted By Discussion Topic: looking for cause of overheating 34 -- page: 1 2     carguy 07-26-2014 @ 8:21 AM reply profile send p.m. New Member Posts: 167 Joined: Oct 2009 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 CraigTerry 07-26-2014 @ 7:44 AM reply profile send p.m. Member Posts: 22 Joined: Jun 2014 Thanks Tom TomO 07-26-2014 @ 7:21 AM reply profile send p.m. Senior Posts: 7243 Joined: Oct 2009 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 CraigTerry 07-26-2014 @ 5:13 AM reply profile send p.m. Member Posts: 22 Joined: Jun 2014 Roger that - thanks len47merc 07-26-2014 @ 4:15 AM reply profile send p.m. Senior Posts: 1165 Joined: Oct 2013 Bill Brown - did you find the smoking gun? Steve len47merc 07-26-2014 @ 4:13 AM reply profile send p.m. Senior Posts: 1165 Joined: Oct 2013 Craig Terry - suggestion to review, if you haven't already, the thread entitled 'Pressurized Radiator Cap' from a couple of days ago and see if any ideas there help you. Steve This message was edited by len47merc on 7-26-14 @ 5:01 AM CraigTerry 07-25-2014 @ 7:41 PM reply profile send p.m. Member Posts: 22 Joined: Jun 2014 Ps: putting thermostats back in, switching 50/50 mix to water with rust inhibitor. Open to any other ideas? CraigTerry 07-25-2014 @ 3:35 PM reply profile send p.m. Member Posts: 22 Joined: Jun 2014 Ok Guys - I'm dealing with a overheating issue as well. Running a 1936 flathead 8. Checked following and found all ok - thermostats, circulation in radiator, belt tension, clean 50/50 green fluid, brakes adjusted, head gasket. Runs at top of normal while underway, when i stop I'm losing fluid through the overflow. I pulled the thermostats and tested without them, got the same results. Any suggestions. carguy 07-25-2014 @ 10:55 AM reply profile send p.m. New Member Posts: 167 Joined: Oct 2009 Thanks everyone for your suggestions. I did run compression tests. When removing the spark plugs I found that the plug in #1 was a bit difficult to remove like there was some contamination on the threads - I didn't see anything, however. all of the plugs were black and sooty, I attribute this to not being able to drive any significant highway miles. The compression readings were from 1-8 96,90,95,94,100,96,86,95. Readings taken with throttle plates and choke open and no oiling of the cylinders. Except possibly for the 86 reading I see nothing significant here. Comments please. Thanks. Bill Brown '34 Cabriolet This message was edited by carguy on 7-25-14 @ 10:56 AM flathead47 07-25-2014 @ 8:54 AM reply profile send p.m. Member Posts: 17 Joined: Dec 2010 May I suggest before you start taking your motor apart check your coolant for combustion products. You local garage should be able to do the test , they take a sample from your rad & add it to a test solution , it will change colour if combustion products are present. You can check your spark plugs , if you have water in the cylinder ( head gasket ) the spark plug will be white , ie steam cleaned. If you have a broken or stuck valve spring this can cause a change in motor temperature & performance , a compression test will indicate the bad cylinder. If it comes down to the radiator before you replace it try removing your thermostats & coolant if using , replace with water & 2 Cascade all in 1 dishwater tablets. Drive the car for 30 to 40 miles & drain. Replace only with water again , drive 30 to 40 miles & drain. If you have a calcium problem in your cooling system this will clean both the block & radiator. I had a boilover issue with my car read about this procedure on the Ford Barn , tried it , car now runs cool & system has been cleaned out.

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