What causes a camshaft to be broken in an OHC engine?
If the cam timing is lost during high revs (broken chain or gears) the con rods will contact the camshaft causing the cam to be broken. Other serious damage can occur at the same time causing the block to be unserviceable. OHC engines break camshafts usually after a seizure of a cam journal in the head.
What should I do if I have a camshaft failure?
For extra protection, an anti-wear additive should be added, such as Crane Super Lube. Do not use synthetic oil during the break-in period. It is not recommended to use any type of oil restrictors to the lifter galley, or use windage trays, baffles,or plug any oil return holes in the valley.
What causes a camshaft to break in a pushrod engine?
When a camshaft breaks it is generally the result of another component failure. In the case of pushrod engines contact with a broken con rod is the usual cause. This is only resultant damage and has no bearing on the condition of the camshaft.
What should I do if my roller tappet Cam breaks?
Roller tappet cams only require engine oil to be applied to the lifters and cam. Also, apply the moly paste to the distributor gears on the cam and distributor for all camshafts. For extra protection, an anti-wear additive should be added, such as Crane Super Lube. Do not use synthetic oil during the break-in period.
What happens if you have a broken camshaft in your car?
A broken camshaft can have a major impact throughout the top end of your engine, doing serious damage to parts like the crankshaft, cylinder block and head, valves, pistons, and connecting rods. Should you notice any of these things happening, pull your car over immediately, and turn off the engine (if it’s still running).
What causes the cam to move back in the block?
If the end play is excessive, it will cause the cam to move back in the block, causing the side of the lobe to contact an adjacent lifter. Broken dowel pins or keys. The dowel pin or woodruff key does not drive the cam; the torque of the timing gear bolt, or bolts, against the front of the cam drives the cam.
What do you need to know about camshaft remanufacturing?
Your camshaft will need to be straight, and without excessive wear. The remanufacturing process usually includes adding metal back to the worn areas through welding, and then regrinding the camshaft back to its original profile. A new timing belt and oil seals are also a good idea when you do this.
Roller tappet cams only require engine oil to be applied to the lifters and cam. Also, apply the moly paste to the distributor gears on the cam and distributor for all camshafts. For extra protection, an anti-wear additive should be added, such as Crane Super Lube. Do not use synthetic oil during the break-in period.