Hi greybrd,
Thank you for the donation.
If it is timing, it most probably would have very low or 0 compression. Did you cross check the belt timing marks?
When compression drops, they could be caused by:
1 Overheating. The head gasket is bad and the overheating has caused the oil in the cylinders to dry out leaving no sealing for compression.
2. If the vehicle had been left idle over extended periods, the piston rings could be dry. Remove spark plugs and pump some engine oil into cylinders and crank without the spark plugs.
Retest compression.
3. Valves not closing fully. Could be insufficient valve clearance or the valves are prevented from closing due to carbon buildups that has dropped onto the valve seats.
A compression leak down test would enable you to find out where the leaking is coming from.
May 9, 2009 at 1:35 PM
