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#41
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Bolt length ought he a nominal length. What, like a 2" bolt length. 1.9" or so for the variety of measurable rod bolts.
TQ-Set Bolt stretch is the change in the bolt length. The 7/16 stuff , not so much concern with the 3/8 bolts huh. Sooo, i tink 6 mil thru 8 mil change ought be the hot-spot for final TQ-Set of the 7/16 bolts. Who has the chart?? |
#42
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Rod bolts from what ive experienced always vary in length. What i do is zero the gauge on 1 bolt and write down which rod and say the tang side is the zeroed one . Then keeping the gauge zeroed for that particular bolt, measure every other bolt and write down stating whether or not its minus or plus of the zero . Some will be plus some will be minus from that first zeroed bolt . Then you just add or subtract compensating off the zero. This way later down the road when you take the motor apart you cam measure the bolts again to see if they stretched or not.
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My Half AN Injun..... |
The Following User Says Thank You to charlie66 For This Useful Post: | ||
#43
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#44
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yes, and you also don't go in blind when you disassemble the engine because you have the original bolt mapped out . All you do is zero that one again . And yes what if that one stretched ? Well you would know by measuring the rest if something is off . I doubt that all the bolts would be stretched so you would know .. I like checking them to see if there still ok . Just like i measure all my ring gaps and write them all down before i install them so i know if there collapsing or not .. haha
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My Half AN Injun..... |
#45
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Yeah I definitely think I go stretch gauge root. For the ring cap I have a board set up over top of tool box all number for each cylinder and hang them on nails as I do them.
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#46
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Have a nice day....awe Geez not the Double-Nut too !
20 seconds of Vibration to loose Fastener TQ. Must be some nasty Vibes, or orbital parts movement. Makes a firm case for Dowel-Pins to restrict parts movement in (orbital) shear. https://www.youtube.com/watch?v=kx-DyuIcGGc&t=13s Last edited by Half-Inch Stud; 04-06-2023 at 09:27 AM. |
#47
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In theory, I am with you. Stretch is a direct measurement and if done correctly, just has to be the most accurate. But in practice, it's a real PIA. I have the ARP branded stretch gauge. Not sure who makes it for them. It is hard to fit and manipulate during engine assembly. As mentioned, I don't have enough strength to pull 80-85 ft. lbs. which is needed to stretch the Molnar bolts to length with regular box wrenches. I do have the Snap-On high performance extra long box wrenches. They do at least make it possible. Still, with an electronic torque wrench with angle capability, I feel confident this method is accurate and much easier to do. As I mentioned, in my limited testing on 16 rods, 32 fasteners. All were within .001" stretch when measured using the torque angle method. So I think either method would be fine and both far superior and more accurate than straight torque.
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The Following 2 Users Say Thank You to mgarblik For This Useful Post: | ||
#48
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Stan
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Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
#49
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Detroit Diesel peanut butter
Great stuff but don't use "peanut butter" for fastener lube unless you really know what you are doing.
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The Following User Says Thank You to Nobuddy For This Useful Post: | ||
#50
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#51
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Torque wrenchs come in many different sizes and torque ratings. The first time I ever used a box wrench extension was 55+ years ago when I was in the Army working on Nuclear missiles and torquing things in so very tight places. Stan
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Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
#52
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That is, if they don't like the simple 31$ tool link I have put up. Those Snap-On digital torque wrenches with angle capability are EXPENSIVE. https://www.amazon.com/Durofix-Digit...3&sr=8-23&th=1 If guys do not want to use the adapter type Gear Wrench makes one for 250 $ https://www.amazon.com/GEARWRENCH-12...s%2C203&sr=8-5 |
The Following User Says Thank You to Dragncar For This Useful Post: | ||
#53
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This is an impressive tool from what I have seen in videos and a couple students that have them. It does it all and less than half the cost of a similar Snap-On version.
https://www.harborfreight.com/hand-t...nch-64916.html Yes, I know it's Harbor Freight, but their top line tools have improved remarkably in the last 5 years. |
The Following User Says Thank You to mgarblik For This Useful Post: | ||
#54
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Taiwan has been making good tools for awhile now. Get them cheap at the pawn shop. Millwrighting, carrying tools I lose them from time to time. So I keep the good stuff at home. |
#55
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#56
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I watch video of Big Chief using his, just so much more you can do with it that makes life easier Makes the Snap on one I have obsolete. Got a birthday coming up. But I’m thinking do I really need it..LOL
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#57
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“It takes considerable knowledge just to realize the extent of your own ignorance.” Dr. Thomas Sowell |
#58
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“It takes considerable knowledge just to realize the extent of your own ignorance.” Dr. Thomas Sowell Last edited by hurryinhoosier62; 04-08-2023 at 03:59 PM. |
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