Just rebuilt an 87 22r engine. .20 over pistons, .10 over bearings, new timing chain set, timing cover, water pump, oil pump, brand new assembled head, LCE cam adjuster, all that jazz. 115 miles after the rebuild (timing is dead on btw) I go to adjust my valves again because they were ticking too loose. (someone told me factory specs while hot). I adjusted the valves cold and checked everything out. I put everything back together, turn the truck over, and I hear a loud metallic pop and snap. The mech fuel pump arm broke AND my damn timing chain broke!! I need to know would you think my valves are damaged? Finances are pretty low and I can barely afford a 2nd new chain.