What is a hydraulic lifter...
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float_6969
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What is a hydraulic lifter...
Ok, so I'm a little confused. When I'm talking to someone and they mention hydraulic lifter, I think Pushrod OHV V-8's. But when put in an OHC application, I get confused. Where does it go? What does it look like? I would imagine the ONLY place it could go would be between the Valve and the Cam/Rocker arm. If someone had a picture of how this is setup in a, DOHC motor for example, I would really appreciate it. Thanks!
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Looneybomber
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Re: What is a hydraulic lifter... (float_6969)
Hmm...Bueller, bueller.
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Hijacker
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hydrolic adjusters are actually more commonly referred to as hydrolic lash adjusters. Normally when you set up a head, you have to adjust the lash on the cam and valve to keep them from slapping or ticking on each other. With a rocker arm setup (such as that on an SR), hydrolic adjusters are put in under the rocker arm and correct the lash automatically. WHen you rebuild a head using HLAs, you still have to set the lash accordingly. The HLAs only have a small margin of correction.
On old L series motors, instead of an HLA, they had solid pivots under the rocker. So you can also think of the HLA being the pivot point for the rocker arm (lever). In fact, some kits are offered for the SR to eliminate the HLAs and move them over to solid lifters. A good investment if it weren't for the feaking high cost. Tomei parts rock until you have to buy them.
The reason when you were hearing HLAs and thinking of pushrods is because you can't have a pushrod without rocker arms. But you won't hear any KA, CA, RB, or VG guys talking about their HLAs ticking. Only the SR guys.
If ANY air gets into the HLA, they will start ticking like mad. All you're hearing is that stupid little check ball slapping around inside the HLA housing. And I absolutely hate bleeding them.
On old L series motors, instead of an HLA, they had solid pivots under the rocker. So you can also think of the HLA being the pivot point for the rocker arm (lever). In fact, some kits are offered for the SR to eliminate the HLAs and move them over to solid lifters. A good investment if it weren't for the feaking high cost. Tomei parts rock until you have to buy them.
The reason when you were hearing HLAs and thinking of pushrods is because you can't have a pushrod without rocker arms. But you won't hear any KA, CA, RB, or VG guys talking about their HLAs ticking. Only the SR guys.
If ANY air gets into the HLA, they will start ticking like mad. All you're hearing is that stupid little check ball slapping around inside the HLA housing. And I absolutely hate bleeding them.
Re: (tenkawa_akito)
You wanna bet on that one? Ive got a KA24E and the lifters on that sucker tap like hell. almost all of the adjusters are stuck on it. Ive got plans to replace them, but at over $50 ea its a little pricey.tenkawa_akito wrote:But you won't hear any KA, CA, RB, or VG guys talking about their HLAs ticking. Only the SR guys.
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Re: (Bandit240)
If I remember correctly, SOHC KA had rocker arms. When I mentioned all of those models, I should have stated the DOHC models since they're all cam on bucket.Bandit240 wrote:You wanna bet on that one? Ive got a KA24E and the lifters on that sucker tap like hell. almost all of the adjusters are stuck on it. Ive got plans to replace them, but at over $50 ea its a little pricey.
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nametakennow
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float_6969
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HOLY CRAP! This is an old post. Looney, you suck! I can't believe you dug this up.
Just so you guys know, I know what a lifter is now and I'm quite familiar with how they function.
And I've got a noisy lifter in my CA. I've manually bled all 16 of them (took me at least an hour and a half and my hands were killing me) and I've still got a noisy one. I friggin hate it. It stops once the car warms up though. I suppose the check valve in that lifter isn't keeping it primed.
Just so you guys know, I know what a lifter is now and I'm quite familiar with how they function.
And I've got a noisy lifter in my CA. I've manually bled all 16 of them (took me at least an hour and a half and my hands were killing me) and I've still got a noisy one. I friggin hate it. It stops once the car warms up though. I suppose the check valve in that lifter isn't keeping it primed.
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float_6969
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TRIVIA!
Mazda and BMW engines were notorious for noisy HLAs, especially after about 100,000 miles. Harmless, but annoying. Usually corrected temporarily by a motor flush or extra oil additives. The noise is gone at cruising speeds.With Mazdas (MX-6, Ford Probe, 626), the cause is sometimes attributed to a weak oil pump.
Mazda and BMW engines were notorious for noisy HLAs, especially after about 100,000 miles. Harmless, but annoying. Usually corrected temporarily by a motor flush or extra oil additives. The noise is gone at cruising speeds.With Mazdas (MX-6, Ford Probe, 626), the cause is sometimes attributed to a weak oil pump.
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PoorManQ45
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Re: (Jesda)
Was there a question in there somewhere?Jesda wrote:TRIVIA!
Mazda and BMW engines were notorious for noisy HLAs, especially after about 100,000 miles. Harmless, but annoying. Usually corrected temporarily by a motor flush or extra oil additives. The noise is gone at cruising speeds.With Mazdas (MX-6, Ford Probe, 626), the cause is sometimes attributed to a weak oil pump.