Mag-Hytec, drip, drip, drip.

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Installed My cover today on my dana 70. I like all the features except the O-ring gasket. It's too prone to leaking and has no real advantage over paper gaskets that I can think of. I would rather have a lower price and a dependable paper gasket. It's not like I'll have to remove it all the time now that I have a drain plug. Anyone know why they do this? Seems like over engeneering to me. Quality is top notch though.

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1972 Chinook class C with 96/215 5spd, 4/5" exh, 4"BD, MagHytec, 85gal fuel, K&N, AutoMeter, www.fostertruck.com/cummins

 

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Just speaking from my own experiance... Oring sealing works much better than paper gaskets and It is VERY rare that a oring will leak... Unless it is installed wrong or very old... Or the wrong application I. E. The space shuttle boosters...

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"Have you driven OVER a phord lately"
2001 2500 BRT WHT SPORT QUADCAB 4X4 ETH 3. 54LSD TRLR CMPR PKG ALL OPT XCPT LTHR

 

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LarryB,

Did you carefully go over the rear axle housing casting for stamp marks or other irregularities as the instructions suggest?

Anywhere the o-ring touches that is not smooth must be filled. I used Pematex Black RTV on mine. No leaks!

 

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Larry, I had the simular problem on my install.

Try some Loctite 518. It is an anerobic sealer. I hope I spelled that right.

NAPA sells it.

 

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Yes, I was particularly careful. That's my point. Why bother when a paper gasket is cheaper and never leaks. With an o-ring one small scratch can leak because the sealing contact area cross section is less than the thickness of the o-ring. With a paper gasket it is almost a full inch. Maybe I'm just being cranky today but I just can't see the extra trouble and expence for no gain other than it looks good. Actually I'm just pissed because I now have to drain it and put a gasket on it any way. I should have done that in the first place. #ad


I know, *****, *****, *****. Give me time, I'll get over it.

 

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what about the "right stuff" we use that on everything now, it is even used oem now
that stuff reall kicks butt
B... ... ... ... ... ... ... ... ... ...

 

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LarryB, you need to use a precision straight edge to check for flatness of the mating surface of the differential housing AFTER you have "stoned" this surface. Assuming this is within acceptable limits, I would suggest you fill the steel stamped voids (ONLY) in the mating surface with a quality automotive silicone sealer and let it cure prior to installing your Mag-Hytec cover. The O-ring seal is vastly superior to any other type of seal available. Another installation tip: lightly lubricate the O-ring prior to installation. If you EXPLICITLY follow Mag-Hytec's installation instructions you will NOT have any problems. I have had mine on for at least 39k miles of the 42k I have on my '98. 5 Ram without so much as a weep! In fact, the entire periphery around my Mag-Hytec cover (on the differential) is rusted due to NO oil seepage.

Thanks again Roy for providing a high quality accessory for my Ram. #ad


Another trick I've learned that works EVERY time; apply Loctite 515 to both sides of a paper gasket (100% coverage) prior to application. This will provide a seal so superior that no oil will seep from it. NONE! I've been using this method for at least 12 years now. If one or both of the mating surfaces is aluminum use Loctite 518 instead. [NOTE: the two Loctite products listed are NOT "Thread Lockers" instead, they are "Gasket Eliminators"].

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'98. 5 2500 QC 4x4 Sport, Glasstite Vision II, 285 BFG A/Ts on M/T Challengers, Warn 4X Boards, Mopar fender flares & tow hooks, NW Custom s/s-rubber mud flaps, Mag-Hytec diff. cover & trans. pan, Edelbrock IAS shocks, Reese Titan V hitch, VDO Vision gauges, Dynamat, '00 Sport grille & valve cover, '00 Sport headlights/PIAA Super White bulbs, PIAA Dual Sport 900 aux. lights, BD exh. brake and TorqLoc, Prime-Loc, Amsoil Dual Remote Bypass, Optima Yellow Tops, Bosch 275s, VA CPC, (censored), Aeroquip braided s/s fuel lines, Banks 14 cm2 turbine housing/Big Head wastegate actuator, ATS 3-piece exh. man. , Banks 4" dia. s/s exh. sys. , BD V10/Cummins hybrid TC & valve body, BD trans. front pump & PressureLoc, Air Bulldog induction hood (with NACA ducts), plus MANY other trick modifications

[This message has been edited by John (edited 10-10-2000). ]

 

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I gotta say I'd take O ring over paper anyday because the O ring can be reused and doesn't stick and have to be scraped off. Did your cover leak after install?

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2001 HO 6 speed Regular Cab SLT 4x4 3. 54 anti spin 2500. Used for the daily grind and sneaking away to some secret Baja beaches toting a cabover

 

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"Hello;
If you are having a problem I think you should have called us before you go and post on the sit. Do you think the folks on the sit can give you better help the we can? We guarantee the parts for life to the original owner. If you would have called us I would have asked you if you read all of the
instructions + the red sheet NOTICE and assuming you had we would ask you if you inspected the sealing service for any flaws letter or number stamps and if you did the procedure on the red NOTICE that would give you a tell tale mark on the case were the O-ring goes. Yes you can use a gasket or PVC
or permatex and it will be a pain to remove if you need to. The V groove is used in a number of aerospace parts and works very well up to 1000 PSI with no problems. There is no pressure in the cover. We have not had any leakers in the Dana 70 or any of the rear end covers and have run over 5000
covers to date. But this isn't saying you don't have one if you do please call us. We have seen a problem with the Dana 70 cover in 4 cases the case was drilled and machined off center and the holes were drilled very close to the edge of the left or right side and the O-ring had no were to seal in
this case you have to use a gasket or PVC to seal the cover you have no choice.
Please next time call us before you put it on the web sit and miss lead a lot of people that really don't know.
Roy @ Mag-Hytec"

All these responses prove my point. The o-ring is the wrong seal for this application. If I have to take extra care to get it to work correctly, buy some special sealers, fill in the stamped numbers, file the case, stone the case, for no gain (paper seals good enough for all o. e. m. apps. ), then it makes no sense to me. This is a non precise sealing surface, especially on used vehicles, and needs a conforming seal to do the job correctly. A thick semi-soft rubber gasket would be the correct application in my opinion, and less expensive. However, the 0-ring seal on the dipstick and overflow port are a perfect application. The manufacturer controls this application and can make it to precision and they will be used repeatedly.

My Mag-Hytec case is definitly a precision part. It's beautiful, The quality is excellent and materials appear top notch. I love the dipstick and extra capacity. The temp sender port I like too.

I know my problem is a bad/dirty sealing surface and a gasket will fix it just fine.

LarryB



[This message has been edited by LarryB (edited 10-10-2000). ]

 

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Sorry, I can't resist butting in here. I agree with Roy. The first order of business should be to go back to the manufacturer before posting. Give them a chance to make it right. We have seen this a few times in the past. Haste only makes for bad feelings. Let's keep this a healthy family site.

Of course if you have no recourse then flame on. Okay off the soapbox I go.

 

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Your right, I'm done, it's fixed #ad

 

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i do think you are being overly grumpy. i didn't check for number stamps, was a little careless with the gasket scraper, didn't tighten and torque in the approved pattern and haven't leaked a drop! thank god roy has his instructions on the web!!

my only gripe is that i can't get a front cover!! get off your *** , roy, and get with the program. #ad
#ad


am going to be installing a mag-hytec transmission pan in a couple of weeks. anyone know what a transmission band looks like? is there a good pic in the service manual?

just got my care package (battery mount for the amsoil duall bypass and ss lines) from ted kidd. i've got my work cut out for me in the next couple of weekends!!

 

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Sorry Larry, the O-ring seal is superior. . end of story! If you want to use a conventional gasket or silicone, so be it. The rest of us will be happy knowing that even if our cover bolts loosen slightly (mine won't) the seal WILL NOT be breached. Either of the other methods will usually produce a leak under the same circumstances.

Have a nice day. #ad


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Mag-Hytec differential cover and transmission pan serial numbers: 144 (for both... could've picked mid double digit numbers if I had wanted). Bottom line: I've had both of my Mag-Hytec products since they were first released for sale. I consider these to be of the highest quality. I've also had nothing but EXCELLENT customer service from Roy. #ad