tdc is the failsafe way of making sure you are back to where you are suppose to be Lyndon. There issuppose to be4 small "slits or marks on the cam shafts and holder that align to each other for correct TDC. If you are doing the exchange, you might also consider changing the timing chain. By aligning the sprockets and the cams to TDC, you will see if your chain has stretched already. Good luck

your neighbor from sanmarcos,

Anthony

What's up wildman!!!!!

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a2


1978 280 CE silver
1986 560 SL black
1987 300 SDL cream
1994 SL 500 brilliant green
1997 E 300d dessert silver
2005 FORD F250 Superduty Crew cab 4x4

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