THE SHOP

Performance & Hotrod Business - July '15

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July 2015 n PRECISION ENGINE n 13 Goodson jig, and the wheel slid onto the crank as easily as a rock drops into water. My advice: install the ring by preheating it, instead of potentially ruining the ring by cold-pressing. Pressing, if not done with a high degree of precision and care, can easily warp the reluctor wheel, rendering it useless. Do not try to force the wheel onto the crank by striking it with a hammer. That's a guaranteed way to ruin the wheel. (Caution: The tone ring is made of two plates riveted together. If you are using a press, and if you cock it out of alignment and continue to press, the plates can begin to separate. If this happens, you can pinch the plates together with C-clamps and carefully tack-weld it back together at the rivet hole locations. Just be careful to avoid creating a warp/runout condition. Again, because the jig indexes to both the wheel and to the crank, misalignment isn't an issue. If you expect to build LS engines, I highly recommend buying this jig. It takes all of the guesswork and time- consuming measuring out of the equation. Don't try to press it on cold. Simply heat the ring, seat it onto the jig, and place the jig and wheel onto the crank. With heat and the right tool, it's easy. Once the wheel has been installed and allowed to cool, test-fit the crankshaft into the block and carefully inspect to verify that the wheel won't come into contact with the rear main cap area. Check to make sure that the wheel features no dis- cernable runout, and make sure that it is aligned with the crankshaft position sen- sor, which is located at the rear of the left side of the block. Mike Mavrigian has written thousands of technical articles over the past 30 years for a variety of automotive publi- cations, in addition to writing nine automotive technical books for four dif- ferent publishers. Mike also owns and oper- ates Birchwood Automotive in Creston, Ohio, where he builds custom engines, street rods and performs vehicle restorations. Mike can be reached at 330-435-6347 or birchwdag@ frontier.com. Birchwood's website is www.birch- woodautomotive.com. As you can see here, the tone wheel is posi- tioned on the crank with the two arrowhead- shaped holes at 90-degrees to the number 1/2 rod pin, with the series of large holes in the wheel positioned opposite from the first rod pin. That's only a rough description. Do not attempt to install a tone wheel by eyesight. You must have the proper installation tool. If you don't have the tool, take the crank and tone wheel to a local engine builder who is experi- enced in this installation.

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