Toymods Car Club Inc: Tech & Conversions => Rebuilding Bottom End

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allencr
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Location:
tallahassee FL usOFa
Registered:
May 2002

Re: Rebuilding Bottom End - need some advice!	Wed, 28 September 2005 14:53

1. pretty good site. look around http://chevyhiperformance.com/techarticles/49258/ 2. Plastigage is the best thing since sliced bread except for microwave ovens & 4AGs. it does not tell if it is out-of round. i've only heard that the rod side play will skew it some, and that some will use a temporary shim to keep it from twisting when tightened. not my experience. 3. practice!! try Starrett, their site might have something. you can do it with a piece of coat hanger, with radiused & very smooth ends, and your mic/vernier caliper if you have to. 4. yes, the clearance is on the skirt, and except for the pin & ring land dimensions, most else would be usless. 5. indexing/degreeing the crank is nice, just to know its OK, but my stuff wasn't that precision and it only really matters in respect to cam & ignition timing being off compared to the one used to set them. TDC on 1 & 4 at zero, and 2 & 3 at 180. You CANNOT do this with a factory pully, on any engine in the world!! its gotta be bigger to be accurate. most cranks get bent/warped. use the #1 & #5 mains(with bearings& oil) as a V-block and use #3 main to check its runout. zero is nice. the Toyota FX16 book RM069U says .0024in max. a dial indicator isn't necessary, and just a stiff wire bolted to the pan rail & feeler gage can make a good indicator & measurment. i just used the cap, #3, with 2 bearings & none in the block(except #1 & #5) tightened down slowley, bit by bit, to bend it straight. take it easy, a little bit more each time. steel springs back more then cast, i imagine. i've never done it on cast iron. 6. machining what??? valve relief, pin size, ring land width or depth, shortened skirt, extra oil ring/scraper? it's just a piece of metal and it isn't heat treated, though it may have a coating. [Updated on: Wed, 28 September 2005 15:07] [Report message to a moderator]

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