'91 22re no issues on long 500 mile drive! Sluggish upgrade, excessive fuel consumption. Jumped timing chain? No longer starts easily, if at all. made a clunk-chug sound n stalled! Let cool down bit n restart. It did, many trys, pumping throttle. It ran/sounded like out of time. Checks: Hand cranked engine, turned freely, occasional slight tightness, assumed was compression. took plugs out, key-cranked engine no antifreeze present, compression #1, #2 150, #3, #4 160. Yet to attempt re-start. Other facts: 226,000 orig miles, Orig. timing chain, has rattle sound upon startup. Norm temp below 1/2, comes to temp quickly! After warm up, idle comes down to 500 rpm's but never quite's. B4 this noticed radiatorcap gasket bad, top hose collapse, bit of coolant leak at cap on engine shut off. Replaced faulty cap then pin hole leaks started. Replacing orig. brass radiator: WHat's most efficient, all aluminium, aluminium/plastic, back to brass, Re-core old?