55 Fargo Posted September 1, 2007 Report Posted September 1, 2007 Hi all, I have 8 bolts to install with the clutch pan, 4 are marked on the head L 3.5, 2 are marked M or W, 2 are marked F. The 2 marked m are shorter than the rest. Any idea what goes where, and what the codes mean. I should have paid more attention, when I removed them from the clutch pan. I plan on re-installing the clutch pan tonight or tomorrow, so I would like to figure this out first....Thanx Fred Quote
1just4don Posted September 1, 2007 Report Posted September 1, 2007 ALL bolt makers have there own little code or mark for their 'brand' Me thinks those M or w's are just a differnet bolt maker than the F's. Now the 3.5,,,are those metric's?? Maybe somebody put in there cause it was close enough?? I never knew bolts to be metric for those,,,screw on a spare nut on all of them to make sure of thread sameness. Otherwise if somebody jammed them in American (SAE) threads,,,you may have to 'chase' those holes to make a bolt fit good. Easier now than while laying on back, crap falling in eyes and nothing fits. Might try hand screwing them in designated holes then numbering them across the board. Make sure IF you need longer bolts someplace,,,more brackets or other space needed, put those in first, all else fails reach in the bolt bin and make them all the same. IF they are rusty or compromised threads,,,makes life easier!! This isnt structural so its a good place to use some zip bolts,,keeps them from backing out on vibration!! Thats what "I" think,,but may be mistaken with those 3.5's That MAY be sae too and just somebodys trademark. There are hundreds of kinds,,,you can look them up on line. remaining --just don-- Quote
greg g Posted September 1, 2007 Report Posted September 1, 2007 Perhaps this will help. http://www.unified-eng.com/scitech/bolt/boltmarks.html Quote
55 Fargo Posted September 2, 2007 Author Report Posted September 2, 2007 Everything was original, they are not metrics, in fact all the heads are 1/2 inch and all the threads are 5/16 coarse. Just different lengths, ie short ones for bottom of the clutch pan. Anyway, I got everything installed, they were 3 different lengths,,discovered as it was obvious, what went where, once I got down to it. I had previously cleaned up the bolts, they went in nicely, when the pan was lined up of course, the bell housing threaded holes for these bolts were cleaned up by me, when I had it out about 3 weeks ago. Thanx for taking the time to answer my thread......Fred Quote
55 Fargo Posted September 2, 2007 Author Report Posted September 2, 2007 Thanx Greg, this is good info Quote
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