LS1-450

iTrader: (33)

There are several, "lifter issue," "whining after cam install," "tapping noise,"...etc. threads, but very few ever explain what the lifter issue was. Some of the threads turn out to be a cam lobe issue that may have or may not have ended up causing a lifter issue.

If you have had a LIFTER issue, please note the specific area of the lifter that had the issue, including the conditions that led to the failure.

Please stick to LSX hydraulic roller lifters.

For example; Was there a pushrod seat failure? A scored lifter bore that caused an issue? Was there a broken lifter roller or roller shaft? These are a few examples of the type of lifter failures to note in this thread.

I haven't seen a thread explaining how a Caddy lifter is better than an LS7 lifter other than to say that a Caddy lifter has a ball check within the lifter...so what? All that does is to help keep oil from bleeding off through the lifter oiling holes while lifting the valve. This has nothing to do with the strength of the actual lifter. Does the Caddy lifter have a stronger or different alloy roller & roller shaft? If so, note it here, 'cuz a ball check does not answer a reliability question. It only provides a more accurate & repeatable lift through the pushrod.

If noting how Company X has a more reliable lifter than the LS7 lifter, explain specifically why; not just that there haven't been reported failures when used w/ aggressively sloped cam lobes. Does company X use a stronger roller & roller shaft alloy so that the roller does not fail when used on cams w/ aggressive lobes? Does company X use a larger diameter roller to slow down the roller RPM?

This is meant to be an informative thread, not a bash a lifter thread so please keep replies to detailed technical explanations. Thanks

mchicia1

iTrader: (5)

The whining noise is from the camshaft, it has nothing to do with lifters. Just wanted to clarify that.

I have had a stock lifter fail once and it was from loss of valve control from the crappy Patriot dual springs. I guess when the spring lost control, it was beat against the cam and gouged, and then slowly eroded itself and the cam over time.

I haven't had any issues with ls7 lifters in the last 30k miles with quality springs, but they have always had an off beat, inconsistent tick at 1500-2500 rpms. I believe this is from them bleeding down from the added spring pressure and heavier valves I have. I am going to swap in Lunati streets on Saturday to see if it fixes the problem.

mchicia1

iTrader: (5)

How does one thread on the internet prove anything again?

For what it's worth, my 25k mile ls7 lifters I just pulled out looked perfect. I only removed them because the low rpm clacking was annoying. The Lunati link bars seemed to have solved that.

chinaoreo

im experiencing that clacking noise with my ls7 lifters.. didn’t know if it was the lifter or my 600 lift daul springs. But its driving me mad and looking to fix it..are your lunatis still nice n quiet..?

02*C5

iTrader: (1)

Have you thought of using short travel lifters? Expensive but well worth it. They are going in my 04 GTO. Did a lot of research and reading. Definitely something you might want to look into. The lift capability of a solid lifter with the ease of use and set up of a hydrolic lifter.

wannafbody

iTrader: (2)

I've had the springs seize on two 5.3 dod lifters.

I had a pile driver sound with my 5.7 LS1 but visually no damage noted to the LS1 lifters or cam. Replaced with LS7 lifters. Engine is still noisier than I'd prefer but runs fine with good oil pressure.

SAPPER

iTrader: (10)

WHY oh WHY are threads from YEARS ago being revisited? This is about 5th one today I've seen from well over 5 years ago. But at least the lifter issue still hasn't changed or been fixed.

02*C5

iTrader: (1)

because they stay on top of the list instead of falling by the waste side and many if us tend not to look at dates of origin. Mistake made and learned from. Maybe have the staff start getting rid of posts that are 3 years old or older with no activity? Just a thought.

kinglt-1

iTrader: (26)

If you removed threads 3yrs or older a lot of good information would be lost. Locking them from posting could be helpful that way the information can still be found by searching.

02*C5

iTrader: (1)

Definitely better idea then mine.🤘🏽

99 Black Bird T/A

iTrader: (4)

Or folks could just look at the date on the 1st post when reading the thread. Not really sure why occasionally necro-ing a thread is that big of a deal. Besides sometimes it's good to revisit older topics if new information comes along allows adding details or closure to a problem.

Definitely 100% against deleting tech thread information or tech threads more than three years old.

No LS7 lifter issues so far.

G Atsma

Leave the old stuff on here.
Having said that, TRASH the idea of putting "Related Threads" right below a main thread. It is too easy to scroll down into the related thread if one is scrolling fast to get to the bottom of the main thread.
Put a link at the bottom of the main thread instead. Problem solved....