Many, many thanks to all that have contributed to this forum. I have read hundreds of threads here and saved thousands of dollars. When I opened the valve covers, I found almost 1/2 the left upper rail just lying on the chain which after measuring it had 10 degrees of stretch. Boy did I dodge a bullet by not driving it. So with your help I installed timing chain guide rails on both sides (upper and lower), new tensioner and rolled in new timing chain. After putting every thing back together and re timing it, it purrs like a kitten. (not bad for a first timer)

Problem is, it still smokes. so back to the leaky valve seals. What spring compressor do I need to buy and how do you remove the rocker arms. This is a 420sel so do I need to remove the cams, or how is this done. Can't seem to find the right thread for this engine.

Thanks