Oil weight in DJ1, quick help, please?

Alright, picked up a NICE 2004 DJ1 for a song from my bud. It's sweet for a few reasons, one cuz it was cheap, two because the first owner swapped out the upper steel stuff(stanchions and steertube) for the lighter alloy versions. Still burly, but shaves like 13 pounds or so...
I opened it up to check out its guts and it was full of motor oil! Now before I opened it up it was nearly rigid. I have no idea what the weight of the original oil was but the rebound wouldn't even let it flow fast enough, kept packing the fork down. I put in 10wt fork oil figuring that's a good enough place to start and I'd go up from there. NOPE. Fork is now basically an air spring with no controls! It about rips the bars out of my fingers when I lift it off the ground quickly and that's with neutral PSI! So no rebound...equals too thick of oil perhaps?
I think 7wt is the thinnest fork oil I can get and it's spendy. 5wt motor oil with a spoonful of tranny fluid to keep it from foaming?

It's an 04. It's external. Thanks for calling me a retard, dude.
I've gone from 20wt, to 10wt, to 7wt, now at 5wt motor oil with a cap full of trans fluid to prevent cavitation. NO CHANGE.
I keep hearing about "blown rebounds" but I don't see how that's even possible. I can pull the cartidge and watch the "window" open and close. I don't think there's much else to it than hard, mechanical parts, i.e. no rubber seals, etc. Even with WATER I should be able to feel the rebound do it's job. Nothin but harsh top-out. I'm running neg psi on one side just to keep it from slapping so hard. Also dropped it down to 80mm travel, so it doesn't have 6" of travel to build up speed then rip the bar out of my hands! lol! I'm confused.

allsk8sno said:

ps that was me on my wifes SN

Click to expand...

Uh huh...likely story...I think we can all safely assume that's your personna for "other" websites...?

As for getting the nut off, just try sideloading the cartridge/pump rod a bit, even just pulling down on the ratchet a bit will usually break em loose for me. And do it the way my buddy did...grab my $400 cordless impact, don'
t bother to check which direction it's going, then sheer the end of the pumping rod right off. I guess it got the lowers off, so technically it worked...?

I'm gonna pull the cartridge apart tonight I think, mess with it a bit. But I think it's pointless, it's a pretty damn simple valve. Big window open, big window closed. But not sure I know what the SSV washer actually is... There's two washers with 3 slots in each, but I think they're just spring seats...there's a plastic spring seat for the useless side...that's about it really. Just the rods, the seats/cone ends, topout springs...that's about it. And I haven't been able to find crap on Marzocchi's "tech area." I'll try googling a few things...

Gotcha. Good luck with that! Oh, also try using a wrench the sise of the shaft, but smaller than the nut or even a knife blade depending on how much space(if any?) you now have under the nut? Push up on the nut while turning? Works on trucks...
I just dumped the oil out AGAIN in my fork and there's atleast some difference between it and the 10wt, so it's doing SOMETHING. I'm gonna plop some 40wt in and see what happens. I've read a few stories that that's what it took to get a few other peeps forks workin right.