Why are changes in force of contraction caused by Frank Starling?

Mechanisms. It was taught for several decades after Starling’s work that the Frank-Starling mechanism is due to changes in the number of overlapping actin and myosin units within the sarcomere as in skeletal muscle. According to this view, changes in the force of contraction do not result from a change in inotropy.

Why are rack and pawl chain tensioners not good?

The rack and pawl design with a spring will constantly put some minimal pressure on the chain slider which would promote wear. The spring isn’t strong enough to resist kickback in the chain under crank deceleration, so it isn’t of any value in tension control in that area.

When to replace HyVo chain tensioners in a car?

One guy on the KLX site thinks it’s okay to replace HyVo chains at 12,000 miles. Those chains are the same design used in some automobiles that run for about a lifetime and on the primary drives of many in-line fours. Other guys think it’s okay to back out the mount bolts to effectively override the automatic system and over-tighten the chain..

How often should I adjust my cam chain tensioner?

It’s usually a small adjustment of 1/8-1/4 turn of the adjuster bolt (one full turn is about .060″ on the M8-1.25 bolt I use) and might only come about every several thousand miles. You also need to be sure to tighten the lock nut adequately.

What happens if the belt tensioner does not work?

Since the belt tensioner keeps the proper spinning of the drive belts in the car’s engine, certain components or accessories may fail to operate if there’s a problem with the tensioner. For instance, the alternator may not work.

Why does the tensioner make a squeaking noise?

Since the tensioner is not able to maintain the correct tension on the belts, it produces a squealing or squeaking sound. This is most evident on the drive belts. If the noise you hear is similar to a grinding sound, then it is possible that the tensioner bearings or the tensioner pulley is the problem.

Do you have to change timing chain tensioner?

No you should never have to change the chains as long as you change your oil regularly. The 5W-30 oil is fine, but you need to use a Hyundai oil filter. There is a bulletin about engine noise when not using a Hyundai filter. Try that first then see if the noise goes away. I will use a hyundai filter and get back to you.