Houle #382
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Thinking of doing some upgrades this fall and I'm just wondering what's the reliability of the hydraulic rollers and what's the best ones out there.
Reliability of Hydraulic Rollers
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Slap Stick
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Must be pretty reliable. Most pushrod engines built now use hydraulic rollers.
Ma Mopar has been using them since the 80s.
Ma Mopar has been using them since the 80s.
Houle #382
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Yeah all the new Hemi's are hydraulic rollers just wondering what the issue is with the lifters on the 5.7 hemi's, lots of lifter failures with them, read about them all the time failing poor lube ?
PRHeads
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This is one of my favorite hyd roller lifter noise videos.
There is actually a pretty long thread somewhere that goes along with the video.
The shocking part for me was(aside from the noise), they actually dyno tested the motor making that racket!!
Eventually, they went to different lifters(and possibly a different cam..... I don’t recall), and the noise level was vastly improved.
I’ve had customers call me with noisy lifters, and I’ve had a few of them check out this video...... and a couple had told me their motors were as noisy as the one in the video.
I personally can’t remember hearing one quite that bad.
There is actually a pretty long thread somewhere that goes along with the video.
The shocking part for me was(aside from the noise), they actually dyno tested the motor making that racket!!
Eventually, they went to different lifters(and possibly a different cam..... I don’t recall), and the noise level was vastly improved.
I’ve had customers call me with noisy lifters, and I’ve had a few of them check out this video...... and a couple had told me their motors were as noisy as the one in the video.
I personally can’t remember hearing one quite that bad.
aeon280
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Everything I have read and seen seems to indicate the vast majority of 5.7 lifter failures are related to #1 oiling issues with the MDS equipped systems and the little plunger that engages the MDS and allows for the lifter to purposely collapse #2 Fleet engines, primarily cop cars having failures (non-MDS) due to the camshaft starving for oil under idle. I can attest to this one being an issue because I purchased 2 auction cop cars with relatively low mileage 5.7,s and both had wiped cams.
PRHeads
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Very little of what you see in an OE HR situation is going to translate very well to a “retrofit” HR performance application, especially where there are faster ramp speeds and higher spring rates involved.
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remember the crank to cam shaft tunnel
are far apart in the 5.7 and rollers never oil well at low speeds lack of splash then consider needles in rollers get starved cause their not pressure fed at idle again so that compounds the problem.
are far apart in the 5.7 and rollers never oil well at low speeds lack of splash then consider needles in rollers get starved cause their not pressure fed at idle again so that compounds the problem.
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451Mopar
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I put Hydraulic rollers in the 440/505" Stealth Head stroker, and I din't hear clattering, but I do hear roller bearing sounds, but the engine also has roller rockers, rollerized thrust button (likely what I hear most against the timing cover), and a rollerized cam gear timing set.
Spring selection is important. Too stiff and you can collapse the lifter plunger, too soft and you limit the engines RPM. Those hydraulic lifters also heavy adding to the valve train control problem. The Hydraulic roller retro-fit cams are also the most expensive.
When I did the 440/505" Trick Flow 240 Head stroker, I used a solid roller cam, and nylon thrust button.
The new 440/512" B1 B/S engine will also be solid roller and nylon thrust button. Maybe one of the mellonized oil pump drives? Depends on the cost. I doubt I will put more a large amount of miles on the car, and my last Bronze Drive "lasted" 10,000 miles. Bu "lasted", I mean it still worked, but you could really see the wear in it, so it was replaced.
Spring selection is important. Too stiff and you can collapse the lifter plunger, too soft and you limit the engines RPM. Those hydraulic lifters also heavy adding to the valve train control problem. The Hydraulic roller retro-fit cams are also the most expensive.
When I did the 440/505" Trick Flow 240 Head stroker, I used a solid roller cam, and nylon thrust button.
The new 440/512" B1 B/S engine will also be solid roller and nylon thrust button. Maybe one of the mellonized oil pump drives? Depends on the cost. I doubt I will put more a large amount of miles on the car, and my last Bronze Drive "lasted" 10,000 miles. Bu "lasted", I mean it still worked, but you could really see the wear in it, so it was replaced.
Mike67
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But it's so shiny!
Well OP, between your two threads on the subject you've gotten similar advice from Challenger340, IQ52, and PRH.....that's akin to getting the same diagnosis from three top doctors at three different hospitals...good luck with whatever you choose. That's a beautiful R/T by the way.
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My understanding is that the 5.7 Hemi cam/lifter trouble is directly caused by excessive idling. It isn't a super common problem for most people but since most Police do a LOT of just sitting, they are the ones that have the highest rate of failures.
No what they're trying to say is hydraulic rollers are junk. Somebody correct me if I'm wrong please.
Mike67
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That is a pretty engine bay set up...But it's so shiny!
Have you ever seen a hot chick and thought "ya man..." then she opens her mouth and youre looking for the closests exit!!
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finish your case of beer then sleep it off
Made me cringe & the cat ran away when it fired.
Wietse
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Regarding those 5.7 hemi's roller failures, i had seen a video of UTG a while ago explaining why these things tend to fail.
That engine in the video above sounds really bad btw
That engine in the video above sounds really bad btw
67charger383
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I like solid rollers
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