Question about Toyota Cars & Trucks
It is not necessary and impossible to do so as the lash is taken up by the hydraulic lifter operation. There will be no adjusting screws on the rockers for the adjusting purposes. If it is making aclicking/tapping noise similar to loose tappets and the engine has done miles then it is possible that either the rocker shaft and rocker bushes are worn or the hydraulic followers need replacing.
Posted on Dec 12, 2014
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Posted on Jan 02, 2017
SOURCE: hydraulic lifters
Yes, but there is still a lot of stuff to move out of the way to get in there and pull them. I would try all the chemical remedies for sticky lash adjusters (oil flush, marvel's mystery oil, etc.) first, then check the timing belt to see if a worn timing belt has let it slip a tooth and the valve timing is off for that reason before digging into the lifters. There used to be a forum that had video and audio from a subaru legacy this model before and after swapping out a bad lifter. Google for it and see if the noise matches.
Posted on Mar 21, 2009
i looked up trouble code P0012 for Camshaft position ”A” −timing over−retarded (BANK 1). Possible causes include: valve timing, oil control valve, oil control valve filter, camshaft timing gear assembly, or your engine control module.
Posted on Jun 28, 2009
This job can cost about $200/$400 depending who does the work.Yes you have to tahe apart the top of the engine,and the valve cover gaskets can be dobne at the same time.but these are two seperate jobs depending on which engine you have,sometimes they both have to be done when you do lifters.
Posted on Jul 23, 2009
Tips for a great answer:
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These engines are equipped with hydraulic valve lifters. No valve clearance adjustments are necessary.Here's a link to help.
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