halftrackinfo
general discussion => ALL mechanical and technical related questions => Topic started by: emptyhead on December 06, 2014, 07:02:10 AM
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I'm replacing the head gasket on my engine in the next week or to and was wondering if any of you guys have some pointers. I'll be using the copper spray sealer unless otherwise advised. The one that was on there that came from the engine shop was a layered metal one the one I got from supplier seems to be a composite. Should it be torqued in two stages 50 and then is it 75 or 80 ft lbs for the final torque.sucks ran the engine twice after picked it up from the shop and had weeping along the sides. Pulled it just to be sure nothing else was going on. Thanks guys
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You should first clean the gasket real good then coat with the cooper spray and lit dry for a bit. When tourqing you want to do it in 2 or 3 stages then run the engine getting it nice and hot and re-tourqing it on last time.
Steve A.
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I agree w/ Steve. I would torque it in 3 steps and also add oil or a sealant to the bolt threads so you have some sort of lube to get an even torque. Also, nice clean threads on the bolts and in the block.
There have been a few head gasket problems on rebuilt engines if the heads weren't retorqued after getting them up to operating temp.
The gasket that came from my motor was a copper victor gasket, I still have it and hope to come across another some day.
Gary
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Thanks guys what is the final torque number for the head bolts.
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110 foot pounds
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Thanks steve
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Question, I rebuilt my engine and had the head and block resurfaced. I used a nos metal gasket. I coated the gasket with permatex ultra copper seal just like the machine shop said and torqued it to what the manual called for. I think it was 70 foot pounds. Leaks. Warmed the engine up and retorqued the bolts. I got about another 1/4 turn each. And it still leaks. I heated and retorqued the bolts several times but cannot get any more movement even at 85 ft lbs. I put in a bottle of Napa's best cooling system sealer at the correct amount and warmed it up for a while just like the bottle said. It still leaks all around the head not just in one spot. I am not sure how to proceed. I do have another new old stock gasket but I really do not want to take the head off again.
Has anyone else had this problem or know how to fix it? Does anyone know if new gaskets are available?
Henry
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Ok i modified my post to make sure there would be no confusion. So DO NOT!!!! go by factory manual tm9 710 1944 and torq them to 195!!!!
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tm9 710 is incorrect.
i followed that manual spec once and stripped out bolts.
here is the post on that.
http://g503.com/forums/viewtopic.php?f=24&t=113443
TM 9-1711 page 203 list the torque spec at 840-900 inch pounds which is 70-75 foot pounds.
i think the 70-75 is correct, I'm not sure where gary got the 110 lb spec that i have been using.
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In TM 9-710C-1 dated May 1947 it states 70-75 foot-pounds.
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I remember a while back on the G503 site that in one of the manuals, the torque setting is incorrect and think it said 110 ft/lbs. Someone tried that and broke a head bolt.
Steve A.
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I would also recommend to go back and recheck torque about a week later if you been running the engine. Not in the manual but first hand experience is a good teacher. ::)
Don G