Diyvehiclerepair
Lack of Lubrication Proper lubrication is vital to maintain normal camshaft operation. When there is a lack of lubrication, whether due to blocked oil passages or too much clearance space, you'll begin to notice wear patterns. This is due to increased friction as the camshaft rotates.
- What causes camshaft lobe wear?
- How much do cam lobes wear?
- What are the problems resulting from camshaft lobe wear?
- What is camshaft lobe?
- What does a wiped cam lobe sound like?
- How long will a worn camshaft last?
- What are flat tappets?
- Does camshaft make noise?
- Can I drive with a broken camshaft?
- Can a camshaft lobe be repaired?
- What does a camshaft do?
- Why would a camshaft need to be replaced?
What causes camshaft lobe wear?
Lobe wear is often caused by improper lubrication during installation. Use only the manufacturer recommended lubricant, which is generally included with the cam. This lubricant must be applied to every cam lobe surface, and to the bottom of every lifter face of all flat tappet cams.
How much do cam lobes wear?
Ten thou is time for a new cam and lifters. Remember: The vast majority of camshafts are only case hardened. Get through that hardened outer layer, and they're butter soft inside. 0.010" wear might mean that the lobe might have another 0.050" to go before the accelerated wear starts.
What are the problems resulting from camshaft lobe wear?
001 of an inch of wear on the lobes can negatively impact your valve timing by as much as 3 degrees. This wear leads to a loss of horsepower and fuel economy, among other problems. And that's not even considering the impact of more extensive damage caused by mechanical interference or other serious issues.
What is camshaft lobe?
Cams located on the camshaft that open and close the intake and exhaust valves in time with the motion of the piston. Cam lobes control the valve lift, and there is a direct relationship between the shape of the cam lobes and the way the engine performs in different speed ranges.
What does a wiped cam lobe sound like?
This will usually start out at high rpm, and gradually work down to lower rpm as the lobe completely flattens out. Rather than a complete and very violent backfire, this single-cylinder backfire will typically manifest as a popping sound through either the intake or exhaust.
How long will a worn camshaft last?
So if you care for a sufficient oil supply and a proper maintenance according to manufacturer suggestions, the camshaft will probably live as long as the engine lives. This said one should know that at least in Europe cars are engineered to have a lifespan of approximately 250,000 km.
What are flat tappets?
Flat tappets have a time-proven performance history. ... The flat tappet, be it hydraulic or mechanical, rides slightly to one side of the cam lobe, which causes the lifter to spin on the lobe for more uniform wear. Flat tappet lifters are actually not flat. They have a slight crown on the face of the lifter.
Does camshaft make noise?
A camshaft is a rod of steel so it itself cannot make noise. Now it is turned by a chain or a belt or even gears. The chain when parts are worn can make a slapping noise, a belt can make a whining noise and gears will definitely make a noise.
Can I drive with a broken camshaft?
Yes, it is safe to drive with a bad camshaft sensor. However, the performance of your engine will not be as good and fuel consumption may increase. ... In some cases, the camshaft may need replacement if there are any other symptoms of failure on this component.
Can a camshaft lobe be repaired?
Camshafts can be rebuilt if they have lobe wear, as long as that wear is not excessive. ... Certain camshafts can have more wear than others and be rebuilt, while other camshafts with similar wear cannot be rebuilt. It depends on the engine specifications and the specifications of the camshaft that fits in the engine.
What does a camshaft do?
The camshaft activates a cylinder's intake and exhaust valves. One lobe will activate the intake valve, followed by a second lobe that activates the exhaust valve. As the shaft rotates, the valves will open and close in the appropriate timing.
Why would a camshaft need to be replaced?
It makes sense to replace a camshaft that has been damaged for some reason - maybe it was defective and one or more lobes wore down early - or another valve-train component has damaged the camshaft of an otherwise serviceable engine.
