Question about 1995 Toyota Paseo

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Knoking comes from possible valve lifter sticking or could it be timing ?

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Valves are knocking due to off timing.change the belt before you get bent valves and a seized engine.

Posted on Oct 04, 2009

  • 2ndclasstech Oct 04, 2009

    valves are knocking due to off timing.change the belt before you get bent valves and a seized engine.

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Is it possible for. Lifter to bend valves in stead of wrong valve timing on a Renault Clio 3 ? Took car for its 90 000km service and cam belt with pulleys and water pump replacement and all went wrong. The...


you are right to be suspicious of the answer that you got, the only way for valves to get "bent" is for them to come into contact with the piston(s).

the lifters are run by the cam, which is run by the timing belt, (which was just "replaced" by the shop) Renault is not the easiest cars to work on, but if it went to this shop for 90k "service", then they should have had the procedures down pat. Sounds like some-one is trying to "CYA" (cover their "you know what")

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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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if you've got a few $$ to risk ,try some synthetic oil with new filter ...it often work good for these kind of noise as long as it is not a loud knoking nois ...if it is only a fast clic clic nois it will probably work!

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If im correct i beleive those engines have hydraulic lifters in them. Thats probably whats making the noise. it's useless to replace them. It's not gonna affect your engines performance. just let it knock

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