View Poll Results: Which side(s)?
Driver
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11
55.00%
Passenger
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4
20.00%
Both
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5
25.00%
Voters: 20. You may not vote on this poll
Valve lifter replacement poll
#1
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From what I've seen, it seems that for most people here who have had a lifter or lifters go bad, it has been on the exhaust side. For me it's exhaust side and drivers' side. Anyway, just curious if there's a pattern so if you know the details, please respond to the poll.
It could be interesting to break it down by intake vs. exhaust too, but there would be too many combinations!
It could be interesting to break it down by intake vs. exhaust too, but there would be too many combinations!
#4
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Listen for a ticking sound that varies with engine speed. You can differentiate between intake and exhaust by listening from both the engine compartment (for intake) and by the rear wheelwell or beneath the car (for exhaust). A collapsed lifter will also degrade power due to decreased valve lift, and someone noted that it could fool the knock sensor into retarding timing as well.
I first noticed my clicking when driving next to a concrete barrier, which reflected the sound, where normally I wouldn't hear anything from inside the car.
I first noticed my clicking when driving next to a concrete barrier, which reflected the sound, where normally I wouldn't hear anything from inside the car.
#7
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Originally Posted by troppo
how much is this fix going to run? parts and labor?
Oh, the valve cover gaskets are about $40, IIRC.
Someone here once said you could damage valves, though I'm not sure how that would be since the problem is that the valve does not open as much as it should. If it opened too much, or didn't close properly that could be a problem. Mine's been ticking for a while though.
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#8
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Tony Callas at Callas Rennsport in Torrance, CA suggests going back to mechanical lifters (964 lifters maybe?) if any significant track work were contemplated. I have also heard this suggestion from Mark Hergesheimer at Hergesheimer Motorsports in Lake Fores, CA
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#10
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hardy track applications, that is what some of the experts recommend.
I remember the "good ole days" of 911 manual valve adjustments, usually every 12,000 miles or so. PITA...and about $500 if you let someone do it for you.
I track my car about 6 times a year. So far the hydraulics have been trouble free. I ain't changing. I wonder what the GT3 and GT3 Cup Cars use, mechanical or hydraulic lifters? I suspect the latter.
I remember the "good ole days" of 911 manual valve adjustments, usually every 12,000 miles or so. PITA...and about $500 if you let someone do it for you.
I track my car about 6 times a year. So far the hydraulics have been trouble free. I ain't changing. I wonder what the GT3 and GT3 Cup Cars use, mechanical or hydraulic lifters? I suspect the latter.
#12
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Not sure which side to tick as for us downunder the driver's side is on the right side of the car... for others it's on the wrong side of the car
That said, I'm sure I have a lifter ticking at the moment on the left side of the car looking at it from the back...
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That said, I'm sure I have a lifter ticking at the moment on the left side of the car looking at it from the back...
#13
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Thanks Kevin - we'll call that drivers' side for the purpose of this survey! Seems like the left-hand bank far and away has the most issues, at least in our small sample. Steve, or anyone familiar with engine internals, care to venture a guess as to why that would be?