Stripped screw hole
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- Chrome Member
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Stripped screw hole
Well inwas rounding the corner on finishing my head gasket replacement, went to install the intake manifold bolts and turns out that one of the holes in the rebuilt heads i bought is stripped.
Doesn't even bite.
So, what are my options?
Larger diameter bolt
Drill and tap
Thanks in advance for your time and advice.
Doesn't even bite.
So, what are my options?
Larger diameter bolt
Drill and tap
Thanks in advance for your time and advice.
- tlbranth
- Platinum Member
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- Joined: Mon Jan 28, 2008 12:16 am
- Location: carnation, wa
Re: Stripped screw hole
I like helicoils.
Terry
Don't own a Vanagon
Don't work at Boeing
Life is good
1999 GL1500 SE
2002 Honda VT750 "ACE"
1975 GL1000
1970 CB750
Don't own a Vanagon
Don't work at Boeing
Life is good
1999 GL1500 SE
2002 Honda VT750 "ACE"
1975 GL1000
1970 CB750
- Lucien Harpress
- Honored Life Member
- Posts: 4083
- Joined: Sat Dec 24, 2011 11:41 am
- Location: Michigan
Re: Stripped screw hole
Check out time-serts too. A bit more involved than helicoils, but (to me) make a bit more sense.
1997 Valkyrie- Light Cutomization, but Too Busy Riding
1980 KZ1300- Bike's Haunted
1976 GL1000 (Yellow)- It Runs (Poorly) and Doesn't Leak (Mostly)
1974 Velosolex 3800- Better Than Walking
1972 CB750- Broke the Chain And Ate the Motor
1969 CT90- The Most Fun You Can Have on 90ccs.
1965 CA77 Dream- Needs a Full Teardown, but Complete
All advice I give is only valid until an expert corrects me.
1980 KZ1300- Bike's Haunted
1976 GL1000 (Yellow)- It Runs (Poorly) and Doesn't Leak (Mostly)
1974 Velosolex 3800- Better Than Walking
1972 CB750- Broke the Chain And Ate the Motor
1969 CT90- The Most Fun You Can Have on 90ccs.
1965 CA77 Dream- Needs a Full Teardown, but Complete
All advice I give is only valid until an expert corrects me.
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- Joined: Sun Apr 13, 2014 10:37 pm
- Location: Cheyenne, Wyoming
Re: Stripped screw hole
Time-Serts are expensive, but I believe they are the best.
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- Chrome Member
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- Location: michigan
Re: Stripped screw hole
the intake manifold bolt are an M6 ?
parts list says 6x32.
parts list says 6x32.
- robin1731
- Membership Admin
- Posts: 21729
- Joined: Mon May 29, 2006 8:31 am
- Location: Decatur, Indiana
Re: Stripped screw hole
32 is the length. 32mm. I use helicoils all the time for bolts that size. Smaller sizes, like for carb bowls, I do use time-serts. But helicoils are fine for 6mm.
1976 Goldwing Super Sport
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
Randakk approved Carb Rebuilder
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
Randakk approved Carb Rebuilder
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- Chrome Member
- Posts: 122
- Joined: Wed Aug 12, 2015 2:47 pm
- Location: michigan
Re: Stripped screw hole
yeah i get the 32 mm.
i was just checking about the diameter.
the parts fiche over at partzilla says they're a 6x32.
so a M6 thread x32?
just making sure i get the right helicoil.
trying to avoid any more unforeseen issues.
i was just checking about the diameter.
the parts fiche over at partzilla says they're a 6x32.
so a M6 thread x32?
just making sure i get the right helicoil.
trying to avoid any more unforeseen issues.
- gltriker
- Honored Life Member
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- Joined: Fri Sep 24, 2010 9:11 pm
- Location: central NY State
Re: Stripped screw hole
Here's a link to help understand the criteria utilized to identify a threaded metric fastener.
https://www.google.com/search?q=Metric+ ... 2&dpr=1.25
Measuring metric thread pitch is confusing at first. Instead of counting actual threads per inch, metric pitch is measured as the distance between 2 adjacent threads, in millimeters. Small diameter metric fasteners may have a pitch measurement of 0.7 mm.
0.7 mm is considered to be a Fine thread.
If I remember correctly, the machine screw that is removed from the synchronizer fitting hole in order to install a synchronizer hose barb fitting is designated to be measured as M5 x 0.7. I don't know what its length measurement is off hand.
I looked in an on-line OEM GL1000 Parts Catalog and found the same incomplete dimension information for the fastener you are studying. Yes. The metric diameter is called out, and the fastener length. The thread pitch number is indeed missing.
Obtain a metric thread pitch gauge to save your sanity .
This item is very similar to the thread gauge that I finally broke down and purchased off Amazon.
https://www.amazon.com/Stainlesstown-Bo ... 0UMK&psc=1
https://www.google.com/search?q=Metric+ ... 2&dpr=1.25
Measuring metric thread pitch is confusing at first. Instead of counting actual threads per inch, metric pitch is measured as the distance between 2 adjacent threads, in millimeters. Small diameter metric fasteners may have a pitch measurement of 0.7 mm.
0.7 mm is considered to be a Fine thread.
If I remember correctly, the machine screw that is removed from the synchronizer fitting hole in order to install a synchronizer hose barb fitting is designated to be measured as M5 x 0.7. I don't know what its length measurement is off hand.
I looked in an on-line OEM GL1000 Parts Catalog and found the same incomplete dimension information for the fastener you are studying. Yes. The metric diameter is called out, and the fastener length. The thread pitch number is indeed missing.
Obtain a metric thread pitch gauge to save your sanity .
This item is very similar to the thread gauge that I finally broke down and purchased off Amazon.
https://www.amazon.com/Stainlesstown-Bo ... 0UMK&psc=1
Cliff (74yrs )
Keep your eyes and ears open and you'll learn something new, everyday.
New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^
RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi
"Can't see the paint when your looking thru the handlebars..........." -Oldewing
"I'd rather Ride than Shine" -RAT Me Too!!
Cliff
'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM https://nakedgoldwingsclub.com/forum/page/Welcome
previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
Keep your eyes and ears open and you'll learn something new, everyday.
New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^
RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi
"Can't see the paint when your looking thru the handlebars..........." -Oldewing
"I'd rather Ride than Shine" -RAT Me Too!!
Cliff
'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM https://nakedgoldwingsclub.com/forum/page/Welcome
previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
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- Lead Member
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- Location: Oz
Re: Stripped screw hole
Hi, having grown up with the metric system in my family's Kawasaki and Honda dealership (Australia) I can confirm that the standard 6mm thread pitch is 6 x 1 (one thread per MM) or commonly known as simply "M6". If you asked for a M6 x 32 screw you should be given a 6 x 1 pitch screw that is 32mm long. This is probably the most common thread size on Japanese and European bikes, closely followed by M8 (8 x 1.25), M5 (5 x 0.8), M10 (10 x 1.5), M12 (12 x 1.75) and M14 (14 x 2). There are other thread pitches available but these are the common ones.
Does that help?
I know its a controversial subject but in my opinion a helicoil in that stripped M6 hole for the intake manifold will be a good fix and will serve you well. I have used many of them over the years and not had a failure. Just for reference I have never used a time cert, so I'm not going to argue either way. Just sharing what works for me.
Cheers,
Matthew.
Does that help?
I know its a controversial subject but in my opinion a helicoil in that stripped M6 hole for the intake manifold will be a good fix and will serve you well. I have used many of them over the years and not had a failure. Just for reference I have never used a time cert, so I'm not going to argue either way. Just sharing what works for me.
Cheers,
Matthew.
Last edited by Matthew on Sun Sep 26, 2021 1:53 am, edited 2 times in total.
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Re: Stripped screw hole
Hi mate,gltriker wrote: ↑Sat Sep 25, 2021 11:30 pm 0.7 mm is considered to be a Fine thread.
If I remember correctly, the machine screw that is removed from the synchronizer fitting hole in order to install a synchronizer hose barb fitting is designated to be measured as M5 x 0.7. I don't know what its length measurement is off hand.
Sorry to hijack the thread for a bit...
I'm thinking that the barb fitting is M5 (5 x 0.8), that is considered "normal" for that size metric screw but on a larger diameter screw it would be a "fine" thread in the metric world.
Sorry, not wanting to point out something wrong, rather just trying to help those that are possibly not familiar with the metric thread system. I believe its quite a simple system, but I have lived with it for close to 50 years. YMMV
Hijack over now.
Cheers,
Matthew.
- gltriker
- Honored Life Member
- Posts: 5063
- Joined: Fri Sep 24, 2010 9:11 pm
- Location: central NY State
Re: Stripped screw hole
Perfect! I didn't remember correctly, after all.Matthew wrote: ↑Sun Sep 26, 2021 1:46 amHi mate,gltriker wrote: ↑Sat Sep 25, 2021 11:30 pm 0.7 mm is considered to be a Fine thread.
If I remember correctly, the machine screw that is removed from the synchronizer fitting hole in order to install a synchronizer hose barb fitting is designated to be measured as M5 x 0.7. I don't know what its length measurement is off hand.
Sorry to hijack the thread for a bit...
I'm thinking that the barb fitting is M5 (5 x 0.8), that is considered "normal" for that size metric screw but on a larger diameter screw it would be a "fine" thread in the metric world.
Sorry, not wanting to point out something wrong, rather just trying to help those that are possibly not familiar with the metric thread system. I believe its quite a simple system, but I have lived with it for close to 50 years. YMMV
Hijack over now.
Cheers,
Matthew.
Cliff (74yrs )
Keep your eyes and ears open and you'll learn something new, everyday.
New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^
RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi
"Can't see the paint when your looking thru the handlebars..........." -Oldewing
"I'd rather Ride than Shine" -RAT Me Too!!
Cliff
'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM https://nakedgoldwingsclub.com/forum/page/Welcome
previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
Keep your eyes and ears open and you'll learn something new, everyday.
New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^
RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi
"Can't see the paint when your looking thru the handlebars..........." -Oldewing
"I'd rather Ride than Shine" -RAT Me Too!!
Cliff
'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM https://nakedgoldwingsclub.com/forum/page/Welcome
previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
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- Chrome Member
- Posts: 122
- Joined: Wed Aug 12, 2015 2:47 pm
- Location: michigan
Re: Stripped screw hole
Thanks for all the input everyone!
Just trying to make sure and get the right stuff.
I went ahead and ordered a complete set of helicoils for varying sizes as well as a male/female thread size gauge.
Very frustrating when I'm so close to finish the job and find out theres a stripped hole in an otherwise freshly rebuilt cylinder head!.
I think I'll get through though..
Just trying to make sure and get the right stuff.
I went ahead and ordered a complete set of helicoils for varying sizes as well as a male/female thread size gauge.
Very frustrating when I'm so close to finish the job and find out theres a stripped hole in an otherwise freshly rebuilt cylinder head!.
I think I'll get through though..
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- Silver Member
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Re: Stripped screw hole
tedfeast, where did you order the helicoils from? I find myself with the same problem with a 1100 I am working on.
79 GL1000,75 GL1000,76 GL1000 LTD,70 CB750k JDM, 79 CBX, 2000 Valkyrie CT 2008 Goldwing Roadsmith
Trike and another 76 LTD bad shape, and several more for parts.
Trike and another 76 LTD bad shape, and several more for parts.
- robin1731
- Membership Admin
- Posts: 21729
- Joined: Mon May 29, 2006 8:31 am
- Location: Decatur, Indiana
Re: Stripped screw hole
Check your local hardware store or auto parts store.
1976 Goldwing Super Sport
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
Randakk approved Carb Rebuilder
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
Randakk approved Carb Rebuilder
- pidjones
- SUPER BIKER!!!!
- Posts: 3238
- Joined: Wed May 22, 2013 4:06 pm
- Location: East TN
Re: Stripped screw hole
Also Amazon.
"Love 'em all.... let God sort 'em out!"
Ex 2006 GL1800 - the Black Pearl SOLD! to make room for:
2021 Can-Am Spyder RT Limited Dark Chalk Metallic
1975 Red GL1000 project - ex Pistol Pete project
1972 Triumph T150V Trident rescue - finished and FOR SALE!
1976 Yamaha RD400c
1978 GL1000 with '75 engine - the Hunley
Ex 1978 GL1000
Ex 1979 GL1000
Ex '79 CB750F rat bike
Ex '86 SEi
Ex '77 GL1000
Ex '76 RD400
Ex '72 Penton 125 set up for flat track
Ex '73 RD250
Ex '68 TR6C - chopped
Ex 2006 GL1800 - the Black Pearl SOLD! to make room for:
2021 Can-Am Spyder RT Limited Dark Chalk Metallic
1975 Red GL1000 project - ex Pistol Pete project
1972 Triumph T150V Trident rescue - finished and FOR SALE!
1976 Yamaha RD400c
1978 GL1000 with '75 engine - the Hunley
Ex 1978 GL1000
Ex 1979 GL1000
Ex '79 CB750F rat bike
Ex '86 SEi
Ex '77 GL1000
Ex '76 RD400
Ex '72 Penton 125 set up for flat track
Ex '73 RD250
Ex '68 TR6C - chopped
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