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196 OHV Torque Specs |
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ramblinfsj
AMC Addicted Joined: Jul/07/2007 Location: Lubbock, Texas Status: Offline Points: 1611 |
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Posted: Jul/07/2007 at 3:39am |
I need the torque specs for a 196 OHV Inline Six. What I need are the numbers for the head bolts and the rod and main caps. Thanks
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1982 Jeep J-20
1965 Rambler American 220 1978 Jeep Cherokee w/401 1983 Jeep J-10 1979 Concord DL 2dr |
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raysinvegas
AMC Addicted Joined: Jul/01/2007 Location: Las Vegas NV Status: Offline Points: 2501 |
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From the 64 TSM:
Head bolts= 58 to 62lbs.
The torque sequence is start on the pass. side center bolt. Tighten in an expanding circle until you reach the farthest bolts from center. Run the engine up to operating temp and torque again.
Rod caps= 27 to 30lbs. dry
Main caps= 66 to 70lbs. dry
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billd
Moderator Group Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
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A suggestion, and this is how I was taught (I like this method, makes sense) is to torque the bolts in phases - do the pattern like said but only torque to about 1/3 final torque, then do it again, to about 2/3 final torque, then again, to final torque. I also then run the pattern again, to double-check.
If it's a large item (like a flat head or a 6 cyl head) I may split it into 1/4 instead of 1/3.
This way you aren't tightening one spot down a lot more than the others. It's amazing how much a part, even a head, will "flex".
Wheel bolts should be done the same, in sequences, about 1/3 final torque each time.
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raysinvegas
AMC Addicted Joined: Jul/01/2007 Location: Las Vegas NV Status: Offline Points: 2501 |
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Excellent advice Billd!
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farna
Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19686 |
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Just remember that the OHV head needs to be retorqued every 10-15K miles or every other year, whichever comes first (TSM states every 8K miles as part of the recommended "major" tune-up). There's something about the engine design that requires this. The "no retorque required" gaskets mean no retorque after initial torquing down. Used to be you installed a head gasket, warmed the engine up, let it cool, then torqued again. That was ages ago -- I've only bought one NORS head gasket that had sat on the shelf for 20 years 20 years ago that had to be done that way, and it was a flathead gasket. The flathead six requires the same maintenance. I put 6-7K a year on the 195.6 OHV that I ran for 14 years and torqued the head every other year with no problems. I doubt many people drive one that much in a year anymore, maybe two years. The head gaskets made now are a bit better than the originals, but you still need to retorque as stated. You can go more than 8K, but don't forget to do it! Good 195.6 OHV heads are getting scarce because people forget th eold cars need lots more maintenance than new ones.
I've never had a problem with a flathead six blowing gaskets, but I only ran one about two years long ago -- not long enough to blow one! That car had sat for several years before I started running it again, but I dropped half a lock washer down a sparker hole about a week after I got it running. Didn't know what it was at first, but the hammering sound clued me in that something was wrong and likely had fallen in. After pulling a head that had been undisturbed for 20+ years off over 21 or so studs, I was REAL careful about those spark plug holes! |
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Frank Swygert
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ramblinfsj
AMC Addicted Joined: Jul/07/2007 Location: Lubbock, Texas Status: Offline Points: 1611 |
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Many thanks gentlemen!
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1982 Jeep J-20
1965 Rambler American 220 1978 Jeep Cherokee w/401 1983 Jeep J-10 1979 Concord DL 2dr |
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