Stripped Engine Bolts in case
Moderator: rztom
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Stripped Engine Bolts in case
Need some help here. I stripped the screws that hold the retaining plate for the transmission in the crankcase. and to compound upon it the heads broke. Im going to take my case to a machine shop to drill out and helicoil the case to make it useable again. Can somebody share the size and pitch of the screws used. It is #15 in the diagram.
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Re: Stripped Engine Bolts in case
This is the answer to all your problem ,
https://www.ebay.ca/itm/Neiko-10038A-Le ... Sw6ShZOkyo
I bought this kit and used them with a simple reversible drill , in 30 sec. the broken bolt was out .
https://www.ebay.ca/itm/Neiko-10038A-Le ... Sw6ShZOkyo
I bought this kit and used them with a simple reversible drill , in 30 sec. the broken bolt was out .
Re: Stripped Engine Bolts in case
ive never had any luck with my set like that, upside down bolts work differently perhaps lol
spark erosion is a good technique to get them out if totally stuck.
spark erosion is a good technique to get them out if totally stuck.
80 XT500 Supermoto!
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82 RD350LC decapitation project
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81 RD350LC Resto
82 RD421LC Hybrid
82 RD350LC decapitation project
82 RD250LC JDM '251LC' YPVS
83 RZ350 Resto
84 RZ500 Resto
85 RZ350 F1 Resto
86 RZ350 F2 Resto
86 RZ350 F2 Hybrid
Like Watches? www.PloProf.com & www.DeskDivers.com
Re: Stripped Engine Bolts in case
LH drill bits and square end easy outs worked for me on the opposite plate, these were the counter sunk screws whose heads had been stripped before i got to them
Use the smallest drill possible and centre punch the head of the screw first, tap the easy out in as far as possible, take it slow and careful and they should come out
A bit of freezit spray on the screw also helps too
Use the smallest drill possible and centre punch the head of the screw first, tap the easy out in as far as possible, take it slow and careful and they should come out
A bit of freezit spray on the screw also helps too
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Re: Stripped Engine Bolts in case
When i went that route, the bit walked on me so it cut into the threads on the case just enough that the square extractor no longer works. It HAS to get helicoiled now (or some kind of thread repair). A bit frustrating, so thats why i need to know the screw size and pitch.
Re: Stripped Engine Bolts in case
These screws are notorious for refusing to budge and then strip
Welding a nut on the screw will do the job and the heat helps to loosen it too
Welding a nut on the screw will do the job and the heat helps to loosen it too
Cryin' In The Beer Of A Drunk Man
- T.RexRacing
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Re: Stripped Engine Bolts in case
Avoid EasyOut tools. There are other fastener removal tools that don't break off making things worse.
First I take a good chisel and make a slot in the remaining screw. Heat with a heat gun to loosen and try removing with flat head screwdriver. If that fails the left hand drill bits are next. Then use the removal tools that come with my left hand drill bits. That fails and it's into the mill and gently cut out with carbide end mills.
First I take a good chisel and make a slot in the remaining screw. Heat with a heat gun to loosen and try removing with flat head screwdriver. If that fails the left hand drill bits are next. Then use the removal tools that come with my left hand drill bits. That fails and it's into the mill and gently cut out with carbide end mills.
There is only one difference between a madman and me. The madman thinks he is sane. I know I am mad.
Salvador Dali
Salvador Dali
Re: Stripped Engine Bolts in case
Another tip is to impact the end to shock the threads loose, before you try and back them out. Hit them hard and often enough and they'll back right out.
Rory
2 1984 RZ350s
1985 RZ350
9 1986-1990 RZ350s
2000 ST2
2005 749
2005 749 with 999 engine
2 1984 RZ350s
1985 RZ350
9 1986-1990 RZ350s
2000 ST2
2005 749
2005 749 with 999 engine
Re: Stripped Engine Bolts in case
M6x1.0
Next time use a impact driver and heat. Those screws have thread locker on them.
If you are going to drill it out, use the hardest, stoutest drill you can find. A carbide spotting drill works well.
Removing broken bolts is an art form that only comes with experience... meaning you're going to screw up a bunch of 'em till you figure it out.
Next time use a impact driver and heat. Those screws have thread locker on them.
If you are going to drill it out, use the hardest, stoutest drill you can find. A carbide spotting drill works well.
Removing broken bolts is an art form that only comes with experience... meaning you're going to screw up a bunch of 'em till you figure it out.
Re: Stripped Engine Bolts in case
Real "Easy Outs" are great. I haven't seen a real "easy out" in years, just crappy knock offs made from oriental monkey metal, that twist off the first time you use them.
I have had good luck using Ridgid Pipe extractors.
I have had a set of these for at least 30 years... the small one is getting kinda short though.
I have had good luck using Ridgid Pipe extractors.
I have had a set of these for at least 30 years... the small one is getting kinda short though.
Re: Stripped Engine Bolts in case
This is all sound advice IMHO. I use a Vessel impact screwdriver these days, its the correct JIS type for the screws and the impacta unit in it works very well.bitzz wrote:M6x1.0
Next time use a impact driver and heat. Those screws have thread locker on them.
If you are going to drill it out, use the hardest, stoutest drill you can find. A carbide spotting drill works well.
Removing broken bolts is an art form that only comes with experience... meaning you're going to screw up a bunch of 'em till you figure it out.
Its defo an art form, Im much better at it now than I ever was, plus I have a full set of helicoils on hand for when it all goes wrong, but rarely get to use em.
80 XT500 Supermoto!
81 RD350LC Resto
82 RD421LC Hybrid
82 RD350LC decapitation project
82 RD250LC JDM '251LC' YPVS
83 RZ350 Resto
84 RZ500 Resto
85 RZ350 F1 Resto
86 RZ350 F2 Resto
86 RZ350 F2 Hybrid
Like Watches? www.PloProf.com & www.DeskDivers.com
81 RD350LC Resto
82 RD421LC Hybrid
82 RD350LC decapitation project
82 RD250LC JDM '251LC' YPVS
83 RZ350 Resto
84 RZ500 Resto
85 RZ350 F1 Resto
86 RZ350 F2 Resto
86 RZ350 F2 Hybrid
Like Watches? www.PloProf.com & www.DeskDivers.com
Re: Stripped Engine Bolts in case
Replace with hex drive/allen head bolts/screws.
I used ss with nickle silver never seize.
I used ss with nickle silver never seize.
Re: Stripped Engine Bolts in case
As L.B. Says, antisieze is really important with dissimilar metals.L.B wrote:Replace with hex drive/allen head bolts/screws.
I used ss with nickle silver never seize.
Rory
2 1984 RZ350s
1985 RZ350
9 1986-1990 RZ350s
2000 ST2
2005 749
2005 749 with 999 engine
2 1984 RZ350s
1985 RZ350
9 1986-1990 RZ350s
2000 ST2
2005 749
2005 749 with 999 engine
- T.RexRacing
- Posts: 1318
- Joined: Fri Nov 01, 2013 8:34 pm
- Location: back in the hills
Re: Stripped Engine Bolts in case
Cleaning threads on assembly is important. Some threads are to be oiled,check manual. When using anti-sieze or other lubricants torque must be reduced to avoid over tightening-UNLESS manual directs you to lube threads. Unless specified torque specs are for dry clean threads.
There is only one difference between a madman and me. The madman thinks he is sane. I know I am mad.
Salvador Dali
Salvador Dali