old popper-big bore g+carlyle hoffman

thanks guys: 1952 A blew a head gasket and I appreciate your input. took me about 4 hours and had the head settin on the bench ready to go to the machine shop. Gonna check it for true and have em look at the valves while I got it off. The manifold was no problem in fact I was surprised at how easy the come loose. I soaked everything with p-b blaster for a couple of days before I started, thot it couldn't hurt but everything went well. IAM AMAZED OF THE QUALITY OF STEEL THAT THEY USED BACK THEN.THATS GOOD STUFF! any way just wanted to get back with you and let you know how things were going. ordered the gasket set sunday from this sight, just waitn on it. and again any and all input will be appreciated. any look out fors and or watch out for this will be gooooood. all I have to do is put it back together again. I also ordered a manual. it should have the tightening sequence on the head if not i'll be back. thanks again, you'all have a blessed day
 
Very glad ! Sometimes its nice when things just "work"! Old adage, start from center of head and work outwords in a circle. I usually go clockwise.I have found that torquing in small increments works well. Like 20 ft lbs at a time. And use some Locktite gasket sealer on the outer vertical rails of the head. Late As like to seep there. By this I mean the very outer surfaces of the head , way out towards the edge. Just lay a bead from bottom to top . I have put the last 6 of mine together like that and NOT one has leaked . . Best of luck to you, and don't be afraid to ask another question if you need too! Mike
 
I checked my last one Carlyle, after I ran it on a dyno and ground feed with it...the torque hadn't changed a bit in 10 hrs runtime. I will check it again after 30 hrs though.
 
Good to hear it was just the head gasket. I always give the head bolts an extra 5 lbs of torque. Seems to help with leaking to the exterior.
 
Along those lines I recall reports that when scrap drives during WW two when John Deere tractors were scraped the instructions were to save the axles . They were to be sent directly for refurbishing for machine gun barrels. Other tractor brands were just melted with other scrap. Few years ago I had a machinist use a transmission shaft from a JD 5010. Fellow put part in lathe, started cut, replied to me this thing came from a John Deere didn't it. Replied yes it did,why do you ask. His reply , John Deere has the best steel , and is tougher to machine.
 
over- torqueing could result in cracking the upper cylinder bore where the head bolt bottoms out .not uncommon on the late "A"'s and "60"'S even 620 and 630 tractors .
 

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