Question about 1992 Cadillac Fleetwood

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92 caddy, noisy lifter, how to fix without break down?

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  • ralphbev Apr 20, 2009

    1992 Cady DeVille 4.9 Lt .. Noisy lifter. I flushed the motor and changed the oil & filter. It still is noisy. Is there a product that will loosen the lifter?

    Ralph

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If your question is "how to fix a noisy lifter without tearing apart a secton of engine FORGET IT. If your concern is will a noisey lifter cause a BREAKDOWN, than the answer is basically NO. Hope this helps

Posted on Apr 20, 2009

  • Eric Heifetz
    Eric Heifetz Apr 20, 2009

    a noisy lifter is usually caused by a faulty lifter ( wont build up hyd oil pressure or a worn camshaft lobe/ and or lifter.

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For tappets, you can try spraying GOOD quality penetrating oil down the pushrods to enter the top of the lifters, if they are hydraulic. If mechanical, adjust gap per your shop manual. Fan belt breaking can be due to misalignment of some pulley, or a driven device that doesn't turn easily (bad bearing).

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Try an oil change with the manufacturer recommended oil. Make sure it is the correct weight, type and grade. I never recommend synthetic for older cars with high miles. You can also buy oil additives at the parts store designed to increase oil pressure and quiet noisy lifters/valves. Oil light means low oil pressure, usually due to broken down old oil, dirty oil filter, or incorrect oil weight used.

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Why does the initial cold start on my2.5L 1996 subaruhave noisy hydraulic lifters


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Why are the lifters getting louder and intermittent sputter.


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Ok i got a 1996 camaro z28, and the engine is knocking. everyone is telling me a lifter is loose so i took the valve cover off and i cant figure out how to tightin them down without pulling the roller...


Actually you cannot tighten a noisy lifter. only the rocker arm assembly and it should be torqued at manufacturer specification. There's not much you can do for a noisy lifter except major engine overhaul. You can try aftermarket oil supplements that are available at most retail stores, including Autozone.

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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:
  • Dirt lodged in the check valve can allow the lifter to leak. Too much wear between the lifter and the body can cause excessive leak-down. This results in a noisy lifter.
  • 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.
  • A lifter can become stuck because of varnish that accumulates between its plunger and body due to a lack of periodic oil changes.
  • 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.
  • The base of the lifter is ground to a radius on a special lifter grinder.
  • Roller lifters have a longer service life than standard lifters.
  • Wear can occur on the roller pin. Some of these pins are serviceable.
It might occasionally be necessary to disassemble a hydraulic lifter to clean it or to inspect it.
  • If this is necessary, disassemble one lifter at a time and pay attention to the order of the check valve assembly.
  • 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

How do i stop my lifter in the motor from sticking...it makes my engine sound like it needs oil


I doubt if there is a lifter sticking. People who say that usually don't know what the noise is. Lifters in your car are operated by oil pressure from the oil pump in the engine. If you are low on oil you will hear lifter noise, probably from more than one lifter. If you are that low on oil, you have probably done some serious damage to your engine. In short, without tearing the engine down you can do nothing for a noisy lifter.

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1 Answer

Wont start


i dout it being lfters as they are hydraulic & wouldnt create a misfire that bad without a lot of noisy Ticking going on
could be fould spark plugs or leads breaking down
A good tuneup on a anyliser & or a computer scan will fix it all up!
Cheers Rob

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there is some good after market product you could use
in they old days we used to drain a quart of oil and ad a quart trans. fluid for couple hundred mile then
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1991 1.8 jetta


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

Visit http://www.ratwell.com/technical/HydraulicLifters.html 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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