What happens to cam chain when timing chain wears?
What happens to cam chain when timing chain wears?
The remaining problem, which applies regardless of whether the engine is stock or modified when the timing chain has worn, is that the cam chain tensioner will have quite a job trying to take slack out of the valvetrain. When a timing chain elongates it may not do so in a uniform way and parts of the chain may be tighter or looser than others.
Where are the punch marks on the cam chain?
Both punch marks are visible and in the correct spot. As the chain wears the tensioner will absorb slack and the cams will retard. In this image with the old chain installed the exhaust cam punch mark is far too high in relation to the cylinder head machined surface and the intake cam is not even visible.
How is the chain tensioner installed on a car?
To do this the tensioner is temporarily installed, set, and the engine turned over at least four times to allow the tensioner to self tension. Once the chain tensioner has absorbed the chain slack it is removed and the plunger position is noted.
Can a plunger be removed from a chain tensioner?
Once the chain tensioner has absorbed the chain slack it is removed and the plunger position is noted. Remember to either install the chain tensioner stopper tool or remove the center bolt and spring, depending on tensioner design, so that the plunger doesn’t extend as the tensioner is removed.
The remaining problem, which applies regardless of whether the engine is stock or modified when the timing chain has worn, is that the cam chain tensioner will have quite a job trying to take slack out of the valvetrain. When a timing chain elongates it may not do so in a uniform way and parts of the chain may be tighter or looser than others.
What to do about a cam tensioner on a Harley?
This is a modal window. Bob walks us through a Harley cam chain tensioner inspection, a common issue on the Twin Cam 88. He removes the exhaust, floor boards and everything in the way of the cam cover. At the cam cover, he reminds us to remove bolts in a star or cross pattern to ease pressure evenly.
How much does a cam tensioner kit cost?
The kit at 429. and the push rods at 140. and cam case gasket… say 600 $$ and 400/500 for the labor= 1000 to 1100$ so I would say 1400 is a little steep! Hope Chopper might weigh in here as I may be OFF on the labor end…
What are the different types of timing chain tensioners?
These include two timing chain tensioners F5RZ-6L266-CA, the left hand tensioner adapter F5RZ-6C275-BA, the right hand tensioner adapter F5RZ-6C275-AA, the left hand chain tensioner arm F6RZ-6L253-AA and the right hand chain tensioner arm F6RZ-6L253-BA. The two DOHC timing chains and guide assemblies should also be replaced at the same time.
When do Harley Davidson twin cam chain tensioners wear out?
They also used, and I can’ remember the technical name of the chain, an older chain design. Indeed the cam chain shoes would wear out partly because of the shoe and partly because of the chain. Harley recommended getting them checked between 35 and 40K miles. Problem is they could give out ANY time and were not covered under warranty.
Where is the hole in the timing chain?
With TDC set, tension can be relieved from the chain. The main tensioner has a small hole in it, and the piston itself has a deep groove near the end of the piston.
How often should the timing chain be replaced?
The timing chain normally needs to be replaced between 40,000 and 100,000 miles unless there is a problem. Issues with the chain are pretty common in high mileage vehicles, so if you are driving an older vehicle, or one with a lot of miles, it is best to be on the lookout for symptoms of the timing chain going bad or failing.
They also used, and I can’ remember the technical name of the chain, an older chain design. Indeed the cam chain shoes would wear out partly because of the shoe and partly because of the chain. Harley recommended getting them checked between 35 and 40K miles. Problem is they could give out ANY time and were not covered under warranty.
What kind of chain is on a Harley Davidson Cam?
On the top is the old-style Hyvo chain and camshaft. As you can see, the chain consists of multiple plates and rides on a wide sprocket on the cam.
When did the twin cam motor come out for Harley Davidson?
1999-2006 Harley Davidson introduced the Twin Cam motor. In order to run the valve train Harley went to a cam chain tensioner set up utilizing a spring loaded shoe putting pressure on the cam chain with push rods. They also used, and I can’ remember the technical name of the chain, an older chain design.
