Re: Timing Chain wear allowance

Posted by DavidPackard On 2020/6/30 16:38:17

No1Packardman

Considering what maintenance you've just finished on the engine I agree that the lifters have likely bled down. Every time the engine was 'rolled-over' to confirm the alignment of the camshaft timing marks there was pressure applied by the valve springs. At low rotational speed there would be plenty of time for the oil to escape, plus the likelihood of any oil pressure to refill the lifter would be slim to none.

If your engine is not starting because of the hydraulic lifters that would be new one on me. Quite frankly I've never heard of that cause and effect path. The 'vacuum pull' you talked about is a strong indication that the engine is fulfilling its role as an air pump, so the intake valves must be opening.

Just how long has the engine been dormant? It sounds to me you have spark and the timing is close. The hand choking result is a good indicator that the air requirement has been met. Now the gas, I've seen fuel sitting on the portion of the intake manifold where the heat riser is located on a cold engine that didn't start, that is, a lot of gas presented to the intake manifold, but not all made the turn toward the valves. Tim would you categorize the fuel as 'fresh'?

One more point. Are you attempting an engine start with the timing cover, and damper removed ? Just asking . . . limit the run time in that configuration.

dp