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Compression test after head gasket |
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Nobodyjeff5888 
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Joined: 27 Mar. 2016 Location: Pennsylvania Status: Offline Points: 880 |
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 Topic: Compression test after head gasketPosted: 21 Apr. 2017 at 8:53pm |
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Ok so being the new head gasket leaked after installed. Refilled radiator and leak started. Thats sitting still not turned over. I have purchased the copper head gasket and will install tomorrow. My question is after install,before running engine can i pressre test? Before addind the antifreeze? Or does engine need to reach temp prior to the test? Never had this problem on any motor ive worked on.strait edge check looked fine on both mating surfaces.torqued in sequence 25 lbs then 45 lbs and finally 65 lbs.(dry).any and all suggestion are appreciated. Thanks again advance.
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athawk11
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Joined: 18 Jan. 2012 Location: Arvada,Colorado Status: Offline Points: 4151 |
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Posted: 21 Apr. 2017 at 9:57pm |
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Your true compression reading will show on a warmed up engine. You can do it cold, but I think it's a waste of time.
Really inspect your surface before setting the new gasket. The studs are prone to leaking. If possible, it may be worth it to pull them, clean them, and reseal them with some Permatex 2.
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1- 1946 CJ2A
2- 1949 CJ3A |
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Nobodyjeff5888
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Joined: 27 Mar. 2016 Location: Pennsylvania Status: Offline Points: 880 |
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Posted: 21 Apr. 2017 at 10:22pm |
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Sounds like a good idea.what about the suggestion to warm up engine without the antifreeze in it? Using a heat temp gun to limit temp? What wiuld that be. Never heatd of that trick. But these old girls are their own breed. Thanks for your help
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pjensen641
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Joined: 21 June 2014 Location: United States Status: Offline Points: 690 |
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Posted: 25 Apr. 2017 at 3:18pm |
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I wouldn't warm up the engine without coolant. The coolant is needed to distributed heat evenly. You could get hot spots and warp something. Because of the water jacket void, a heat gun will not give you an accurate reading of the temp.
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TERRY
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Sponsor Member Joined: 22 May 2007 Location: BOULDER COLORADO Status: Offline Points: 3400 |
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Posted: 25 Apr. 2017 at 6:46pm |
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Just use water for the initial fill, and when all is OK drain and use antifreeze.
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BOULDER 48 2A
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Nobodyjeff5888
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Joined: 27 Mar. 2016 Location: Pennsylvania Status: Offline Points: 880 |
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Posted: 26 Apr. 2017 at 1:07am |
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Thanks for the responses. Already did the startup and warm up . No leaks with the copper head gasket. Now im having problems with the carb after rebuild. Different thing all together. But thanks again. I really do appreciate your help
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Johnnygeep
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Joined: 03 Nov. 2016 Location: Wentzville Status: Offline Points: 150 |
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Posted: 26 Apr. 2017 at 3:55am |
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Nobodyjeff5888
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Posted: 01 May 2017 at 7:32pm |
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Talked to Scoutpilot. He put me in the right direction. Wonder site and great help. Pass it on to all
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