I have an 88 acura that has overheated once again. This time it blue the head gasket. I'm reassembling it now, and I come to discover that I may have had the valve timing wrong from last time.
I don't have any manuals. The only documentation I can find says to line up the marks on the cam pulleys (obviously), and then attach the bottom half of the timing cover and the crank (accessories) pulley. Then check the little "white mark" on the pulley. It should line up with the plastic pointer on the timing cover when at TDC.
Really? This seems kinda silly and a real pain in the neck.
Okay, there is no white mark on the rusty old crank pulley. However, there are a few tiny notches "chiseled" into it. One of which looks like it might be painted red. The others could be construed as ignition timing marks because they occur several degrees before the red notch (assuming the engine spins counter-clockwise when facing the timing belt, which I believe it does).
Now, several degrees (maybe 10-20) clockwise from all the notches on the crank pulley is the actual key-way. Furthermore, there is a single small dimple/notch on the crank timing belt pulley itself. This dimple is several degrees farther clockwise from the key-way.
Does anyone know for sure what all the this means? Does the key-way play no role whatsoever in setting TDC? What about that dimple/notch on the crank timing belt pulley?
It seems odd that the key-way is not used, since the cams, distributor, and cam sensor all have some type of key-way that points up when at TDC. But not the crankshaft?
Anyway, I intend to follow the only documentation I have, and line up that red mark on the crank accessory pulley with the plastic pointer on the timing cover. It is in the neighborhood of TDC when eye-balled with the piston itself.
Any insights would be appreciated.