2002 Magnum 360 - 125k miles. Engine runs like a sewing machine - no noise, but the cam is tiny. Looking at one of the following four Hughes grinds, likely either the 0814 or 1418. Want to optimize as much 'truck' low end torque as possible and also up the mid range - 70 mph on the highway will be ~2200 rpm. Have to install fresh springs, but the question is, is it 'ok to re-use the OE roller lifters', or 'never re-use Magnum lifters'?

Available small block Magnum cams from Hughes are (I'm leaning on #2 or 3):
HUG SER9703ALN-14
SB HYD RLR CAM 197/203 -114ºLSA NEW CORE

HUG SER0814ALN-14
SB HYD RLR CAM 208/214 -114ºLSA NEW CORE

HUG SER1418ALN-14
SB HYD RLR CAM 214/218 -114ºLSA NEW CORE

HUG SER1822ALN-14
SB HYD RLR CAM 218/222 -114ºLSA NEW CORE

Roller lifters do not develop a wear pattern from the cam lobe and should be safe. Examine them to be sure, including vertical mark on the tappet body. The wheels must turn smoothly, with no tight spots or "scratchy" feeling, and no wiggle.
However, they have a limited life expectancy before they need re-building. If they have needle bearing on the axle it's dangerous if they come apart, the needles get into everything.

Anyone know the safe life of factory roller tappets?

I reused these without any trouble. Yours is a mild application, if the Lifters are good i´d use them. I run the stock hydro rollers with 250°@ .050" / .620" Lift, they work flawlessly up to 7000rpm.

Michael

I have reused them on several mild builds, no issues. up to 6,000 rpm they seem to work very well, did not rev them over that on the dyno.

Just make sure you disassemble and clean them completely. I just built a Magnum for my buddy and the lifters were very dirty inside but no real wear.

Gus

I agree. Not necessarily an apples to apples comparison, but GM Sbc stuff is reused very often. I rebuilt a fairly healthy 355" two years ago, and after some deep cleaning and close scrutiny reused the factory roller lifters. Since then, that engine has been through two seasons of truck pulling turning a steady 6k in one of the stock classes. So far so good.

coolieo! New ones from Hughes are $300 bucks, and while that isn't a 'huge' amount...if the lifters pass my inspection (and I am pretty picky) I'll re-use 'em.

The 360 is going in the 02 Dak in my sig. All electronics have been removed, installing Eddy 7577 intake and Sniper 2bbl with HyperSpark ignition. Being build for overlanding including lots of technical rock crawling involving lots of just-off-idle running all day long. Multiple crawl ratios up to 134-1, and a 46rh for nice highway manners. Need a cam that has z-e-r-o lope, but has better mid range and top end - looking for better gains between idle-4500 rpm, cruising at ~2000 rpm. Any cam recommendations from the four listed above I'm all eyes.

Thanks for all the replies folks - much appreciated

Happy Holidays,
- Sam

You might as well try to reuse them since you're putting a new cam in a motor with 125k miles on it anyway.

If the lifters check out reuse them no problem. Go with the 0814 cam I have in in a 5.9 in my 2002 Ram van and love it. Night and day difference from oem cam.

Just read yours is an off road application. Might consider the smaller 9703 cam with your set up. Talk to Hughes and see what they recommend.

0814 cam gives up just a little bottom end for a lot more mid range and top end.

I've got lots of 'gearing' for the off-road bits so no worries there - in fact as silly as it sounds the OE cam is plenty for what I need on the trails, but it'll just suck wind on the street so what I'm after is a better cam from 1500-4500 rpm, with a sweet spot of 2000 cruising at 70 mph. No concerns about anything above 5k rpm - will never hang out there. What's also real nice is both my OD and LU are on toggle switches, with 12v power supplied via a speed-sensing relay via a B&M controller (at speed x relay energizes enabling both OD and LU, and below speed x power is removed, disabling both OD and LU), so when the OD is engaged and I step in it to pass someone it'll stay in overdrive vs downshifting into 2nd gear - geeze I hated that part about the 46re. Anyway...

FWIW, this is the graph from my Gear-Speed calculator for the 46rh (and similar) transmissions, in my case with 5.38 gears and 40" tires -

Call Cam Motion

2157 Beaumont Drive
Baton Rouge, LA 70806
Email:info@cammotion.com
Phone:225.926.6110

I used them a few years ago to regrind a stock magnum core for less than 1/2 the price of a new cam.

They were able to put a 224@.050" .500" lift on it for me.

thanks for the recommendation - called this morning and alas they don't do Mopar small block cams anymore, and instead recommended Howards or Bullet Racing cams (I think it was those two). I'm still waiting to hear back from Dave at Hughes...

This.

One at a time/don't mix up the internals.

Heard back from Dave at Hughes - he recommended a 210/216, on a 110*, and both Howards and Bullet had similar recommendations...but unfortunately none were available at either and no end in sight for backorders, so Comp Cams it is.

At Comp Cam's recommendation, I'll be installing their #20-745-9: 212-218 (264/270), .480/.480, on a 114* LSA. The next cam down was their 20-744-9, which is a 206/212 (258/264) also with .480.480, but on a 112*, and with my intended use he indicated the 114* of the taller cam would make my idle a bit better while still giving a real nice mid-range and upper end, and that sounded good to me.

Appreciate any/all thoughts about how the Comp bumpstick will 'perform' in my 360.

OBTW, I think the stock/OE cam is 184/194, .410/.410, 112*...

https://www.compcams.com/xtreme-ene...ulic-roller-cam-for-chrysler-magnum.html

Got the first couple lifters disassembled - wow were they stuck - no 'springiness' to the plunger. Got off some of the buildup and cleaned them out a bit, worked them loose. Made a quick trip to Harbor Freight and picked up an ultrasonic cleaner, filled it with a mix of purple power and water, dropped in all the bits, gave them a final cleaning with brake cleaner, and reassembly with fresh oil, and now the first one's got it's 'boing' back and feels good. 15 more to go!

In my turbo truck, I ran the stock lifters for about 10 years with a mild cam (similar to HUG SER1822ALN-14). I only turned the motor to 6,000 rpm.

If you find you need a few stock ones, let me know and I can send you some.

I am currently in the process of upgrading cams to a slightly larger one and using the Hughes 5006S lifters for the new cam.

Thanks for that! I have 15 more lifters to resurrect so I might just hit you up on that .

I'm installing a CompCams #20-745-9; 212/218 (264/270), .480/.480, on a 114* LSA. Hoping it gives my truck a nice but mild increase, and they say it'll have zero lope at idle, which is very high on my 'wants' list. Should work good...and Comp is among the only mfg's that actually have cams in stock...

- Sam

I second that. The new cam is coming from Comp but it is a custom grind as the "off the shelf" ones were smaller than the one I currently am using.

Was the second picture after you ran parts in cleaner ? Gary

no it was just a close-up of them going in - honestly they didn't look amazingly better after coming out - mostly just 'shiny-er' - I know they're cleaner than they went in, if nothing else just knocking some very small debris loose, which the final spray with brake cleaner washed away. I only ran it for one 480 second cycle, and I'll experiment more with the others maybe running them for two cycles, etc. I got this ultrasonic cleaner vs less spendy ones (on Amazon, etc) mostly because I wanted a unit long enough to fit the push rods, plus the rockers and whatever else I can get in there. Don't really know what ratio of purple juice to water but it was about 30-70.

To be extra safe I'm not using 'metallic' bristle brushes to clean the lifters, just fiber or plastic bristles, cloth rags, and lots of brake cleaner - I don't want to take a chance of scraping off any metal and alter the oil-pressurization properties of the lifters.

Also, here's a disassembled view of a magnum lifter I found online here ( https://www.488magnum.com/post/valve-lifter-servicing ) - these are V10 lifters but IIUC they are the same as the magnum 360, 318, and V6, and the componentry is the same as mine, again just FYSA -