ALPRIDER
New Member
Looking for a bit of help. At 20K my S10 refused to start. A cylinder leakdown test revealed 80% compression loss within 30 seconds. Trying to drop the engine so that I can disassembly and have a look. Here is where the trouble started. My Yamaha dealer could not get the special tool required to remove the Positioning Bolt (P/N 90890-01485) for at least 8 weeks. Being the impatient type I had a machinist make up a tool that I thought would do the trick. Long story short, it didn't do the trick at all. Instead I have now stripped the grooves on the positioning bolt. I have tried a #6 easy out on the 7/16" inner bore of the positioning bolt with liberal amounts of penetrating oil, heat and paraffin and even acetone and ATF mixed together (not at the same time with the heat) all to no avail. I am starting to wonder now if the bolt is perhaps a left hand thread or if it is designed in some way where gripping the ID with an easy out. Can someone who has dropped the engine from the frame let me know if I am on the right track or if there is some helpful trick or tip to get the darned thing out? Thanks very much for your time.