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L5P Weakest Links
Yeah these have the Modified LML pumps. 1 or 2 washers. Have to look when I get one opened up again. Sent from my SM-S901U using Tapatalk -
L5P Weakest Links
Does a [emoji199] [emoji90] in [emoji269]? Sent from my SM-S901U using Tapatalk -
L5P Weakest Links
Thought about it actually. However issue only arises if you let them set for a long period now. So kinda put idea on back burner while sorting out other issues. This is what made me think of how startup relates to these L5P changes. Unless the centerline specs are off, not much else causes... -
L5P Weakest Links
I ran into a completely unrelated cold start issue on the twins that makes me think more deeply about this bearing change. With the huge external oil coolers [2quarts], 12AN lines, and HP6 style filters mounted higher than the block ports , I knew cold starts might be an issue. So I found a... -
L5P Weakest Links
But unlike the Howard's rod design, there is no specific angle indexing to control the oil flow to only a few deg of rotation. All oil coming into the main, has an easy path right back out that second hole. Which means it has to pressurize the complete cam assembly first. Think about full... -
L5P Weakest Links
Most interesting.. I can see the new approach is to not route it behind the bearing as done for decades. Let's cut down the surface area on the top main because load is always towards the bottom bearing. Groovy. Brilliant... Sent from my SM-S901U using Tapatalk -
L5P Weakest Links
I was thinking about the oil passages routing up to the cam from the mains. In my younger days, we used to tap the cam bearing holes and put restriction plugs in there to restrict flow to top of the block. Now everything is roller tappet.. One would expect that old moto transferred into... -
L5P Weakest Links
While searching for a good parts engine to crack open, was just told that main bearing issue should be our primary concern. Which could be related to cam / lifter oiling also if ya think about it.. Also just learned 2024 6.7L Ford is packing monotherm pistons from factory now. Squirrel... -
L5P Weakest Links
Yeah that's few thou off from being a Ford. But it's certainly doable, if there is a demand. One would hope GM addresses it with their OEM. 6.0L Powerstrokes suffered similar issues. Rare, but is noted failure point. Not solids chart, but good ref list below. Hydraulic Roller Lifters - Crower... -
L5P Weakest Links
Wish I could find the contacts I made back in 2011 on lake Cumberland who work at the plant. One of them was the actual QA inspector, who had bins of parts in his workstation. Sent from my SM-S901U using Tapatalk -
L5P Weakest Links
Hear they are also running journal bearings rather than needles with good success. Came from my GM tech buddy, who before leaving to play with electric vehicles, actually replaced some failed lifters in L5P. Said new style setup looked straight outa of an LS to him.. So check the bore diameter... -
L5P Weakest Links
I knew that Howards rods comment would get your attention... :giggle: My main R&D backer recently passed away very unexpectedly. So latest upgrades to the twins is currently on hold while his family sorts things out. Reason I haven't posted any updates on that for a while. But since he would be... -
L5P Weakest Links
Yeah I love those rods too. At first I questioned em because they sent me bearings that were drilled in the wrong location. But once Custis explained to me why they have a groove cut under the bearing, which allow the crank passage to send pressurized oil to pin as rod is traveling downward... -
L5P Weakest Links
I'll try and reach out to Dustin about what he's learned so far. To me, it comes down to cost to bring each model up to 800hp marinized standard. If changing pistons only, not a big deal. If changing piston and rods, well I know what combo works best there. And last I knew, Wagler ended up... -
L5P Weakest Links
Got ya. The forged piston approach for marine use never got much traction. The only one I was involved with lasted mere minutes, and produced a 100% failure rate. The monotherm approach lacked any interest due to no real world need. Is anyone exploring backwards compatibility with a rod piston... -
L5P Weakest Links
Ok, so two of the three biggest issues are easily fixable. Which leaves the main bearings. What's everyone's findings been pointing to there? Sent from my SM-S901U using Tapatalk -
L5P Weakest Links
That's certainly some new issues to consider then. I once ruined a set of LMM lifters by leaving them in a bucket out in the rain.. GM somehow topped this internally by screwing with the main galleys? Or did they change the lifters completely? Sent from my SM-S901U using Tapatalk -
L5P Weakest Links
Good to know on the turbos. The one thing we will likely change anyways due to power levels. As for control, the latest aftermarket advances makes tuning easier and cheaper than going wirh the old plan best I can see. Sent from my SM-S901U using Tapatalk -
L5P Weakest Links
Had a customer hit me up recently about possibly marinizing an L5P. Looking for a solid 750hp setup for use in a lightweight pleasure craft. After considering the cost of bullet proofing a LBZ/LMM to hold 800hp for 1000hrs, I had to consider that maybe it's time to finally test waters with the... -
What did you do at work today?
The LMM ECM is the better option for marine use. Easier to connect the canbus to marine displays. Sent from my SM-S901U using Tapatalk- kidturbo
- Post #3,080
- Forum: Smoke Signals