Author Topic: son of a b!#$% (Read 17852 times)

d-rock · « **on:** March 03, 2015, 07:14:09 PM »

well, had a bad day. pulled my engine apart last week to send cases for power coating. got them back yesterday, they look beautiful, but are now f*@$#&. all of the bearing now fall into the case. they pressed apart last week. they were 85 atc cases that had never been used. I'm sick to my stomach now. anyone else ever have this problem?
Thanks, Derek.

Hawaiiysr · « **Reply #1 on:** March 03, 2015, 07:33:04 PM »

wHaTTT! Something happened

mandom250r · « **Reply #2 on:** March 03, 2015, 07:34:53 PM »

The cases expanded and the bearings are now too small?

Hawaiiysr · « **Reply #3 on:** March 03, 2015, 07:49:28 PM »

Even if the cases were heated they should have contracted back to normal. Sum thing is not right

patman13mia · « **Reply #4 on:** March 03, 2015, 08:12:31 PM »

I think the bearings are falling out as if bores are to large? Ive read before that powdering the cases has to be less temp or differnet process than most parts. Did the ppl you send to have experience with powdering cases? And are you sure they are the same cases? Lol. What if they sent you the wrong ones? Just a crazy thought. Are they shady business?

d-rock · « **Reply #5 on:** March 03, 2015, 08:29:18 PM »

they are a very experienced company, used by a lot of people. I have seen Harley parts done there and lots of sled engine cases done. I had a set done 10 years ago and they were ok. but now these are garbage.
and yes the bores are too large now. the bearing all fall out. mains, and all trans bearings. (bearings are all new )
they are my cases, I had to clearance the top of the crankcase for my new +4 crank. and the serial number is the same.

Jimbo45 · « **Reply #6 on:** March 03, 2015, 08:46:57 PM »

They were brand new and you had them powder coated? Sorry man, that sucks.

dem3500 · « **Reply #7 on:** March 03, 2015, 08:58:30 PM »

I've been powder coating for about five years now and I have never heard of this before. Although I've never done a set of cases before I still find it strange. I've pc'd piles of cast aluminum hubs without any problems as well as a clutch side cover of my own and the new water pump besring went in snug as it did when i took it out. So did the mechsnical seal and the two dowel pins. If i were to pc my own cases i would have never given it a second thought, i would just have sprsyed them. I've also been going to school for metallurgy for the last two years and have never heard of anything like this. It has me really curious!
Is there any powder on the inside of the cases? ie was the inside portion taped off or was there over spray?

Burns363R · « **Reply #8 on:** March 03, 2015, 09:32:07 PM »

I agree it doesnt make sense. But you can have the cases sent out and have the bores resized with steel inserts. Shouldnt cost to much.

dem3500 · « **Reply #9 on:** March 03, 2015, 09:39:26 PM »

OK so I'm not the only one that thinks this isn't right. I did a quick search and i can't find anything. Something else that dawned on me......how many times have you (or anyone) heated up a part to get a besring in or out!? I think most of us have atleast once. I'd say its pretty safe to say that any part that houses a bearing is most likely a cast part. You say you know for sure these are your cases right? You mentioned clearancing your cases. My guess is they got powder in the bearing seat and they used a dremmel or something to clean it out.....like I said.....just a guess.

xTHUNDERCATx · « **Reply #10 on:** March 03, 2015, 10:13:42 PM »

Your looking at the cases, but you said they were new bearings, where did you get those, what if its the bearing tolerances that are bad?

aberegg05 · « **Reply #11 on:** March 03, 2015, 10:24:22 PM »

I'm with burns363r. I'd send em out to get fixed. Or sell em to me

dem3500 · « **Reply #12 on:** March 03, 2015, 10:38:23 PM »

I just re-read the first post. It says you pulled your engine apart to PC the cases but then you said the cases were never used. I guess I'm a little confused

d-rock · « **Reply #13 on:** March 03, 2015, 10:41:12 PM »

I had the engine assembled last 2 weeks ago. But the paint looked shity , so I pulled it apart again and sent the cases out. All of the new bearings were tight in the cases, now they are loose. There is no power on the inside at all. It was taped off. The power coating is called sparkle silver. Then cleared. I don't know if it was actually powder coated twice, maybe that was the problem. Too much heat maybe.
The cases are from a 85 atc engine that has never ran but was assembled.

udontknowme · « **Reply #14 on:** March 04, 2015, 01:48:58 AM »

im not familiar with powder coating. do you bake the parts at 400f for a hour or something like that ?