Question about 1993 Eagle Talon
I am concerned on the condition of the camshaft, if it it is damaged.
Timing belt 'A' was stripped from a 1.8L engine, 1993 Eagle Talon DL.
The overhead camshaft sprocket cannot be manually rotated, the timing belt 'A' has been removed, timing belt 'B' is undamaged.
The temperture for three days was below freezing, an average of about 20 degrees. The engine was started and ran for about 3 minutes at this temperture and then died, Timing belt 'A' was stipped, antifreeze was at a ratio of about 20% vrs water. I would like to know how to determine the condition of camshaft and any other parts that may be of concern, prior to installing a new timing belt.
About the easiest way, is to put all belts back on properly, and turn engine over before complete re-assembly and check for compression.
I'm not able at this time to confirm that the 1.8L is, or isn't an interference engine, but regardless, you need to do this to see if any damage occurred anyway. Double check your oil pump sprocket & silent shaft timing. It can be 180 degrees out & still run, but engine may have a vibration when running.
Posted on Apr 13, 2009
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Posted on Jan 02, 2017
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Engines, chain- or belt-driven, can be classified as either free-running or interference, depending on what would happen if the piston-to-valve timing is disrupted. A free-running engine is designed with enough clearance between the pistons and valves to allow the crankshaft to rotate (pistons still moving) while the camshaft stays in one position (several valves fully open). If this condition occurs normally, no internal engine damage will result. In an interference engine, there is not enough clearance between the pistons and valves to allow the crankshaft to turn without the camshaft being in time.
An interference engine can suffer extensive internal damage if a timing belt fails. The piston design does not allow clearance for the valve to be fully open and the piston to be at the top of its stroke. If the belt fails, the piston will collide with the valve and will bend or break the valve, damage the piston, and/or bend a connecting rod. When this type of failure occurs, the engine will need to be replaced or disassembled for further internal inspection; either choice costing many times that of replacing the timing belt.
NOTE For manufacturer-s recommended service interval, refer to the maintenance interval chart located in this manual.
The average replacement interval for a timing belt is approximately 60,000 miles (96,000 km). If, however, the timing belt is inspected earlier or more frequently than suggested, and shows signs of wear or defects, the belt should be replaced at that time.
WARNING Never allow antifreeze, oil or solvents to come into with a timing belt. If this occurs immediately wash the solution from the timing belt. Also, never excessive bend or twist the timing belt; this can damage the belt so that its lifetime is severely shortened.
Fig. Never bend or twist a timing belt excessively, and do not allow solvents, antifreeze, gasoline, acid or oil to come into contact with the belt
Inspect both sides of the timing belt. Replace the belt with a new one if any of the following conditions exist:
Hardening of the rubber-back side is glossy without resilience and leaves no indentation when pressed with a fingernail Cracks on the rubber backing Cracks or peeling of the canvas backing Cracks on rib root Cracks on belt sides Missing teeth or chunks of teeth Abnormal wear of belt sides-the sides are normal if they are sharp, as if cut by a knife.
Fig. Worn teeth from excessive belt tension, camshaft or distributor not turning properly, or fluid leaking on the belt
If none of these conditions exist, the belt does not need replacement unless it is at the recommended interval. The belt MUST be replaced at the recommended interval.
WARNING On interference engines, it is very important to replace the timing belt at the recommended intervals, otherwise expensive engine damage will likely result if the belt fails.
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