sandblasting cases
- Thread starter chrisdoc0608
- Start date
chrisdoc0608
insulting
- Location
- rocky mount, nc
ok guys i just inspected these cases before i took them to get blasted, and i found some cracks:
this is the one on the bottom, it just looks like the rod hit and dented it out a little, the crack doesnt go all the way through as far as i know.
look right below the bolt hole, there is a hole in the case beside of it. is this a water jacket? does that small hole even matter?
here are the fine line cracks that the rod apparently did, look on each side of the notch in the center of the arch. the welder at the machine shop said he could cut a v in the cracks and weld them and grind back down. will it be ok?
and this is the side of the case that is not completely in line, it was bent out a little i guess bc of the rod hitting that arched area that was cracked in the previous pic.
so should i continue and get these blasted? then get the hairline cracks welded? as for the one on the bottom could i grind it down and then fill with epoxy on the bottom? are these worth fixing?
this is the one on the bottom, it just looks like the rod hit and dented it out a little, the crack doesnt go all the way through as far as i know.
look right below the bolt hole, there is a hole in the case beside of it. is this a water jacket? does that small hole even matter?
here are the fine line cracks that the rod apparently did, look on each side of the notch in the center of the arch. the welder at the machine shop said he could cut a v in the cracks and weld them and grind back down. will it be ok?
and this is the side of the case that is not completely in line, it was bent out a little i guess bc of the rod hitting that arched area that was cracked in the previous pic.
so should i continue and get these blasted? then get the hairline cracks welded? as for the one on the bottom could i grind it down and then fill with epoxy on the bottom? are these worth fixing?
chrisdoc0608
insulting
- Location
- rocky mount, nc
i just noticed in some of the pics you guys posted that the areas i have cracks in are filled. what did you use to fill the viods, is it ok if i just fill them as well?
chrisdoc0608
insulting
- Location
- rocky mount, nc
guess what..... the bottom half is a 6m6:banghead: so i guess im still looking for some argggggg... at least i got a goot stator and bendix out of it.
Idok
F1pro
- Location
- Nations oldest muthaF+++kin city
helicoils are great! in many cases they can actually be stronger than when new...
oh, and the bottom cases dont matter...
waxhead
wannabe backflipper
- Location
- gold coast
that crack in the front is a casting mark
dont worry about it
dont worry about it
chrisdoc0608
insulting
- Location
- rocky mount, nc
casting mark? im not sure that it is, it would be a strange coiencidence (sp) that there was a buldge in the wall right were the cracks are, they definately look like cracks, the pics dont do them justice. so could i fill in the water jacket or whatever it is with epoxy like i have seen in some pics of crank cases? then i wouldnt have to worry abt welding it... but what abt the buldge of the side of the case in pic 4?
BombThreat
'Diggity
- Location
- Johnstown, NY
Also all 650, 701 61x and 701 62T engines use 6m6 bottoms.
chrisdoc0608
insulting
- Location
- rocky mount, nc
bump... can i fill all the voids and will the "warped" edge in pic 4 matter?
waxhead
wannabe backflipper
- Location
- gold coast
we must be looking at different things
i am looking at a casting mark they all have
i am looking at a casting mark they all have
chrisdoc0608
insulting
- Location
- rocky mount, nc
ok here are the cracks im talking abt....
i know someone else knows the answers to the rest of my questions... Speak up please! i want to know
1) can i fill the voids in the cases (water jacket? idk)
2) will that area that is warped in pic 4 matter?
i know someone else knows the answers to the rest of my questions... Speak up please! i want to know
1) can i fill the voids in the cases (water jacket? idk)
2) will that area that is warped in pic 4 matter?
Those cases look like an accident waiting to happen. IMO it would be possible to make them work but if you start welding on them to fix the cracks you will have watch for warpage. I would also be concerned with keeping the mating surface between the case halves true enough to not have an air leak after all the blasting & welding.. Good luck with those crusty jewels :biggrin:
chrisdoc0608
insulting
- Location
- rocky mount, nc
wouldnt that stop any leaks that may come about from those hair line cracks which btw are not that predominate, i used paint to illistrate them on the picture.... what do i fill them with? and nobody has let me know if that warped area will be ok or not. worst case ill just scrap them, i think i found a 61x long block that needs no rebuild for 225 from some old guy near me, but i would like to make these work if possible.
-chris
chrisdoc0608
insulting
- Location
- rocky mount, nc
oh yea, i think im gonna get them bead blasted first and see if it will get all of the junk off, i have been told it is a lot less harmful than the sandblasting
Boris
The Good Old Days
- Location
- The surf-less coast
Unless you have a friend who is willing to blast and weld for free, I wouldn't bother with those.
62T cases in nice shape can be had for $200. How much will it cost to repair your duds ??
62T cases in nice shape can be had for $200. How much will it cost to repair your duds ??
chrisdoc0608
insulting
- Location
- rocky mount, nc
to get them bead blasted they said between 25 and 50... i have a friend who can sand blast them at his shop most likely for free.... worst case i can go 45min away back to school in greenville and bead blast them for free myself at a shop.
again though, if i fill the voids with an epoxy wont that be sufficient enough to seal those hairline cracks? what abt jb weld?
again though, if i fill the voids with an epoxy wont that be sufficient enough to seal those hairline cracks? what abt jb weld?
Boris
The Good Old Days
- Location
- The surf-less coast
It may be sufficient and JB weld might do the job, but what if it fails ??
Not much fun chasing an air leak, replacing pistons while you could be riding.
What I'm saying is that there are too many maybes, ifs and buts for me to trust those cases. Unless, you are just playing around with some back up motor to experiment on.
Let's recap here,
blast the cases = $$$$
weld cases = $$$$
epoxy cases = $$$$
chrisdoc0608
insulting
- Location
- rocky mount, nc
well i will be keeping my group k 650, so if it fails i will have a backup. i would do a leakdown test once put togather. the cases dont see high compression, so i would think an epoxy or jb weld would be plenty to keep air from escaping. and the long block i found might be a 62t or 61x, he wasnt sure i will know on thursday, but for 225 and no rebuild needed im gonna jump on it. if it is a 61x would that be a good platform to build on for freestlye 701, i know alot of ppl use the 62t bottom and 61x top, but would a straight 61x be ok as well?