Ed Peters tech talk video

[shadow88]

Maybe you'll get something from it. I sure found the zinc thing interesting and Also found out why I kept bending shift forks lol

CAUTION!!! 34 minutes long, but worth it if you learn something.

http://www.youtube.com/watch?v=m_toEAYSOB0&feature=related

[bakes]

Dam good vid and thank you Ed for doing this vids

[unluckyty]

Wow, great info. Well presented by Ed.

Greg

[rich tideswell]

knowelege center this video

[bakes]

knowelege center this video
+1 :thumb:

[BadAssPerformance]

I couldn't make it to the 10 minute mark, does he talk about anything more than oil?

[bakes]

I couldn't make it to the 10 minute mark, does he talk about anything more than oil?
yes talks about forks and shifter you should see the rest as some of it applies to A520- a555 and other as well

[rich tideswell]

positive stops on the shifter (maddog modded), cable stretching, booger bushings ........

seems like the video was longer, and chopped down to about 35min as it was ......

[johnl]

There's a related video, same maker, on 2.4 oiling system, oil filters, how one oil cooler adapter part number ending in C is awful because of 90* bends and another ending in D flows much better, and how porting the D adapter is even better - 10 HP.

[rich tideswell]

There's a related video, same maker, on 2.4 oiling system, oil filters, how one oil cooler adapter part number ending in C is awful because of 90* bends and another ending in D flows much better, and how porting the D adapter is even better - 10 HP.

need that link

[johnl]

need that link

http://www.youtube.com/watch?v=-NCtIydonns&feature=channel&list=UL

That shouild be it.

[shadow88]

Oh, that's good stuff!! Oil pump fracture information starts ay 8:55 for all you 2.4 guys.

[bakes]

i wounder if that was the problems that JT's oil pump was seeing

[shadow88]

i wounder if that was the problems that JT's oil pump was seeing

JT and Dean too! It could be a matter of rpms. Sadly, they'll see the same damage again if it isn't the damper issue they feel they've tracked down.

[Reaper1]

My phone is about to die and I'm at work on lunch. Are these the Arizona tapes?

[GLHNSLHT2]

nope

nope and nope stupid short msg requirement

[BadAssPerformance]

Oh, that's good stuff!! Oil pump fracture information starts ay 8:55 for all you 2.4 guys.


i wounder if that was the problems that JT's oil pump was seeing

He said that it was due to high RPM and then when you lift throttle, the oil has to back up and go someplace, and suddenly stops, and backs up pressure to the gerotor and cracks it...

OK, not sure how the oil "backs up and stops" when the pump is what is creating the pressure. Hydro lock would be from having more oil in the cavity than the size of the cavity. Where does the extra oil come from? Think about in a 2.2L where you can spin the i-shaft to drive the pump manually without even turning the motor over (no timing belt), when you stop spinning it, the oil pressure just dissipates in the engine, not pressurizing the pump. Unless he is trying to suggest that the hydrolock is caused by pressure at higher RPM (instead of the lift throttle that he said it was), which, if his hydrolock theory is true, then anytime the rotor went above X RPM and stopped it would hydro lock and crack.... not after repetitive use, but the first time. Cold motor, 7500RPM, KaBoom.

[cordes]

That didn't make a lot of sense to me either.

[Ondonti]

I know on the crank driven 6g72 pump that a loose fit means that high load/rpm dynamics will shake the gear back and forth (given whatever play it has) and that can lead to fracture. Toga pumps for that motor have a sleeve installed to potentially increase precision of fit while keeping cost down. There was a bad batch of mitsu pumps a few years ago that lead to a bunch of motors getting eaten on the dyno etc and this was thought to be the main reason but the fear lead people to get billet gears made....which might sound great but I have heard of them deforming.

[BadAssPerformance]

Yes, high rpm/load/pressure will definitely put stress into the pump. The PM rotor is susceptible to damage in an agresive appilcation but find for 99% of usage. Yes, I have heard about some engines having a bad batch of pumps, but have not heard this for the 2.4L's. DCR used to sell billet steel rotors and now sells coated PM rotors with some added machined reliefs on them. Why no more billet steel? Guess its not needed? Or he figured out the lack of a damper at high RPM was the cause? I have yet to hear anyone have an exact explanation of how they are cracking. DCR also has a ton of oil pressure reduction mods, but his are more for reducung the parasitic loss than the oil pump issue.

The rotor cracking is from pressure or vibration, or a combination of those. At higher pressures, the oil will escape (not get pumped) past the gerotor to housing clearances. This is why they have clearance specs cuz if the clearance is too high it wont make pressure at all.

[Reaper1]

I wonder if it's possible for the oil to cavitate in that style pump? I know that's a long shot, but cavitation is a very violent event and could cause severe damage.

[BadAssPerformance]

Yes, cavitation is definitely possible and ont he "potential cause" list

[DodgeZ]

this was discussed already

[BadAssPerformance]

a few times

[Reaper1]

Well, I didn't know that. I don't know as much about the 2.4, but I like to try and solve problems. Can you guys point me in the direction of the other times the cavitation has been discussed? Thanks! :)

[BadAssPerformance]

search 2.4L oil pump issues.. Dean had a thread, I had some in my p-log, and a coupel other threads have been started too