Question about Mtd Gold 42" Zero-Turn Mower -

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The hydraulics have become very noisy after 10 hrs of work, they used to whir now they screech. i am told it is the oil going through a valve,is this correct and how do I get it back to how i bought it, nice and quiet.

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  • jchriswi Nov 18, 2009

    I meant the machine has only worked 10 hrs in total over a period of 2 months not 10 hours continuous work. The noise is noticable the moment you switch the machine on. How do we fix it? would a thicker oil be better?

  • jchriswi Nov 18, 2009

    i am referring to 10 hrs of total work over a period of 2 months. the noise is there the moment the machine is turned on.There is no sign of a leak. Can I use a thicker oil if so what.



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Many times these hydrolics start making funny noise when the oil level drops down, same principle with a car steering's hydrolic..when the oil level gets low they screech.Check the oil level and see if it needs topped up.Hope this helps.

Posted on Nov 18, 2009

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Oil may be the cause of the problem. Oil expands during heating and at 10hrs of work this is definitely possible. I would advise a quick inspection of the system, for leaks or loose parts. Expansion of oil may cause it to escape from loose clamps/crimps on the hoses or at other parts. The noise may come from loss of pressure due to the reaction of oil. Check your oil seals as well. Check always for visible sign of wear. Other than that is you may have to check for dirt that may have entered the system which may contribute to the noise.

Posted on Nov 18, 2009


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A noisy engine

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Jan 05, 2016 | Cars & Trucks

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I ran low on oil and the valves became noisy, I put oil , but I believe the valves somehow aren't getting that oil. Is there a way to prime the system? The indicator lights remain on after the engine is...

noisy cam followers or hydraulic lifters from lack of oil indicates that the bearings also were short of oil
yes the valve train is the last to get oil but if they had none then there would be little for the big ends and mains so if it appears to be short of oil up top , it may be because the bottom end has suffered damage

Nov 25, 2017 | 1998 kawasaki VN 1500 Vulcan Classic

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My Audi a3 has got aloud ticking noise coming from engine once it gets worm

your vehile is fitted with hydraulic valve lifters. if the kilometers is quite high on the engine i would suggest replacing the lifters and make sure you use a proper engine oil cause that is the most common reason why chains and lifters fail

Aug 19, 2012 | Cars & Trucks

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What causes the lifters to click for a few minutes then they my not click for 3 or 4 days

Your lifters are the hydraulic type. Inside the lifter is a small piston that is driven by engine oil pressure. As the lifter gets older, a small amount of residue forms inside that is more sticky when cold than it is when warm. That prevents the piston to move freely until it gets warm. The piston takes up slack between the cam and valves, so when it's stuck, the valves become noisy.
Usually if the problem is minor, adding marvel oil to your engine oil will gradually dissolve the deposit and quiet it down. Internal lifter wear can also cause a similar problem. Adding a viscosity improver such as lucas additive will often help with that.
Your only other option would be to take the engine apart and actually replace the lifters.
When using additives, give them time to work....deposits form over time and it takes time to make them go away.

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Valve tapping ccan I fix it myself before I take it to mechanic

Inspect/Test/Service/Replace Hydraulic lifters can fail for several reasons:
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  • A lifter might be noisy because of an oil pressure problem.
NOTE An oil pressure problem will be evident on hollow pushrod engines if no oil is reaching the rocker arms.
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  • A stuck lifter can sometimes be freed up by the addition of an additive to the oil, or by spraying fuel system spray cleaner down a hollow pushrod oil channel.
  • Lifters that stick because of varnish buildup can sometimes be loosened up by squirting carburetor spray cleaner down the hollow pushrod lubricating channel, where it contacts the rocker arm.
Hydraulic lifters are not rebuilt because they are relatively inexpensive. It is possible to disassemble and clean lifters but they must be reassembled with their mated parts. Because of the labor time involved, this procedure is usually impractical.
Sometimes a piece of foreign material becomes lodged in the lifter check valve. If the lifter is removed and disassembled before serious wear between the lifter and cam lobe results, it may be cleaned.
Worn mechanical (solid) lifters can be reground.
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  • Roller lifters have a longer service life than standard lifters.
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It might occasionally be necessary to disassemble a hydraulic lifter to clean it or to inspect it.
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  • Lifter disassembly is done by pressing down on the pushrod seat with your thumb and using a screwdriver to remove the snap ring.
  • Remove the plunger from the body; this may require tapping the body.
  • Next, remove the check valve assembly.
  • After thoroughly cleaning the lifter components in solvent, visually inspect them for signs of wear.
  • If the internal components pass inspection, the lifter can be reassembled.
  • During reassembly, cleanliness of the parts is of utmost importance.

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1 Answer

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It is a hydraulic adjuster that is either plugged with debris from dirty oil or it has worn past it's service limits. The adjusters are located in the tips of the rocker arms. You will need a mechanic to take them out and clean them.

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3 Answers

Looking to adjust valves on a 2.2 chevy motor in a Corsica hydraulick lifter

Sorry but there is no valve adjustment with hydraulic lifters - can turn the lifter upside down fill with oil - let sit for a while and then tap on the lifters to see if they make noise - if noisy replace.  Camshaft may be worn on the lobes or may have jumped timing if belt.

Jun 09, 2010 | 1994 Chevrolet Corsica

1 Answer

No oil preasure

First check the oil level. Do this on a level surface. Make sure it's close to the full mark, or in the operating range on the dipstick.
Next check to see how old the oil is. Is the vehicle well past it's scheduled oil change?
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Rule of thumb is 10 lbs. of pressure for every 1000 Rpm.

Vehicles have a by-pass valve in the oil system. This comes into play when the filter is clogged up. The oil flow goes past the filter.

This by-pass valve is usually located in the engine block, where the filter attaches. It's up in the block itself. Depends on the vehicle, as to whether this statement hold true. There are many designs for an oil system.

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2 Answers

My friend just got a 1988 ford ranger  v6 2.9L and has a valve tap and was wondering what different kind of ways he could fix this

if its an ohv type the most common fault is that the oil ways to the rocker shafts become blocked
so get some flushing oil drain the oil and replace with the flushing oil and run for the time stayed on the can then Change to good quality oil and new filter
then remove the rocker covers and check and adjust the valve clearances
if its an ohc type its all hydraulic adjustment
you could try flushing as above but apart from that the only other way is to change the lifters and followers
hope this helps

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3 Answers

1991 1.8 jetta

I would say probably not a weak oil pump...

Visit for a good explanation on how hydraulic lifters work.

Might be a bad valve adjustment (yes, valvetrains with hydraulic lifters still have some kind of adjusting mechanism), or lifters which get airlocked (bleed down fast and have a hard time pumping back up by themselves)

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