12Likes
|
|
25 Jun 2016
|
Registered Users
Veteran HUBBer
|
|
Join Date: Aug 2013
Posts: 149
|
|
Is there enough metal thickness for the lid to run a tap?
I like the exhaust valve location but I all ready have the head assembled.
|
28 Jun 2016
|
Registered Users
Veteran HUBBer
|
|
Join Date: May 2013
Location: Wisconsin, USA
Posts: 827
|
|
It's thin but will be enough to hold the probe .It only needs to be about 5-6inch/lbs torque max , I put some rvt or similar sealant on the threads and just snug them up .
|
31 Jul 2016
|
Registered Users
Veteran HUBBer
|
|
Join Date: Aug 2013
Posts: 149
|
|
Can someone please give me the head bolt torque number.
Clymer manual seems to low
Book says 18 lbs but that seems low
|
1 Aug 2016
|
|
Registered Users
Veteran HUBBer
|
|
Join Date: Sep 2008
Location: BOP , New Zealand
Posts: 186
|
|
From factory service manual 1990 First Edition
Cyl Head
Flange bolt M8 x 1.25 = 21 ft/lb
Stud bolt M10 x 1.25 = 14 ft/lb
Bob
__________________
Remember that Assumption is the mother of all f**k-ups.
|
5 Aug 2016
|
|
Contributing Member
HUBB regular
|
|
Join Date: Jun 2011
Location: Brisbane Australia
Posts: 69
|
|
Quote:
Originally Posted by Jens Eskildsen
Air/rattle-gun
|
Never use a rattle gun to tighten any nut/bolt that has a specific torque setting.
This is basic mechanical engining.
__________________
I once ruled the world, till mum told me it was only the garden!
|
5 Aug 2016
|
|
Contributing Member
Veteran HUBBer
|
|
Join Date: Jul 2005
Location: Wirral, England.
Posts: 5,673
|
|
Quote:
Originally Posted by otr002
Never use a rattle gun to tighten any nut/bolt that has a specific torque setting.
This is basic mechanical engining.
|
True... One should NEVER rattle gun anything tight. Apart from perhaps a set of wheel nuts on a Transit Van
However there are some very accurate (And expensive) air guns that you can use because they are limited to certain torques. On torque sensitive bolts I still wouldn't though.
In this case I think he meant use a rattle gun to remove the clutch nut which is totally acceptable.
__________________
Did some trips.
Rode some bikes.
Fix them for a living.
Can't say anymore.
|
5 Aug 2016
|
Registered Users
Veteran HUBBer
|
|
Join Date: Dec 2008
Location: Denmark
Posts: 1,417
|
|
I never use a torque wrench. But with just the slightest idea of what youre doing, I see no problem using an airgun to tighten big nuts like that. Most of the airguns (both of mine) them have different settings.
I know its not the proper way to do it, but I do what works for me, and give others the option of choosing for themselves
My wr250r has something like 125Nm for the rear axle, making it just about impossible to remove with the tools provided by Yamaha. I cant figure out why they list it so high, and I've had no problem setting it way lower.
So again, for me, nothing beats real life experiences....Eventhough they are wrong if you go by the book.
Happy riding...
|
5 Aug 2016
|
|
Contributing Member
Veteran HUBBer
|
|
Join Date: Jul 2005
Location: Wirral, England.
Posts: 5,673
|
|
Quote:
Originally Posted by Jens Eskildsen
I never use a torque wrench. But with just the slightest idea of what youre doing, I see no problem using an airgun to tighten big nuts like that. Most of the airguns (both of mine) them have different settings.
I know its not the proper way to do it, but I do what works for me, and give others the option of choosing for themselves
My wr250r has something like 125Nm for the rear axle, making it just about impossible to remove with the tools provided by Yamaha. I cant figure out why they list it so high, and I've had no problem setting it way lower.
So again, for me, nothing beats real life experiences....Eventhough they are wrong if you go by the book.
Happy riding...
|
I couldn't disagree more with this....
There are so many torque critical components on a motorcycle that you dont know you're wrecking until many miles down the road. Theyre the kind of second hand bikes you dread buying.
Torque settings arent made up for the sake of selling manuals.
Fair enough, its pretty difficult to screw up a rear axel but if youre 'rattle gunning' engines back together then remind me never to buy a bike off you...
__________________
Did some trips.
Rode some bikes.
Fix them for a living.
Can't say anymore.
|
5 Aug 2016
|
|
Registered Users
Veteran HUBBer
|
|
Join Date: May 2013
Location: Norway
Posts: 1,371
|
|
Quote:
Originally Posted by Jens Eskildsen
I never use a torque wrench.
|
You are the best
|
5 Aug 2016
|
Registered Users
Veteran HUBBer
|
|
Join Date: Aug 2013
Posts: 149
|
|
Put all back together and started up without drama.
Spent about 1/2 hour breaking the rings in etc, leisure driving.
Inspected bike and can hear a hiss from the head gasket .
Stripped down bike again
Head measured straight
jug measured straight
Cosmetic head gasket, which seems a whole lot less sturdy then OEM.
Head bolts were torqued to spec. But just didn't seem tight enough.
Gonna check threads and see if any debris in head bolt chambers etc.
Going to take head to machine shop to validate, should of done that 1st I know. Kicking myself now.
Am i missing something?
Head gasket was stock size
No copper/silver spray added on install
|
5 Aug 2016
|
Registered Users
Veteran HUBBer
|
|
Join Date: Dec 2008
Location: Denmark
Posts: 1,417
|
|
It doesnt make sence to me to go by yamaha specs, when nuts on the counterbalancer and crankshaft loosenes. Yamaha doesnt mentioning loctiting theese either, I did it anyway. Quite the hack job, huh?
I havent "'rattle gunning' engines back together", I've used it on 3 nuts, 2 of them known to beeing prone to loosening up.
I didnt just fire up the compressor and airgunned it till the nut didnt moove anymore. I know how tight the bolts was to remove, and tightened them the same amount. I marked the nut/shaft with a marker before breaking them free, and tightened the 2 bolts proone to loosening up, just beyound that. The clutch to the same mark, as this isnt a problem. Still used threadlocker.
So should be VERY close.
What difference would a couple Nm be? Its like under 10% difference. Theres probably a bigger difference in torqing the threads oiled vs not.
I did it about 1,5 year ago, just wanted to know how much time you give me before the engine grenades. I really dont think my nuts care which tool was used to tighten them op tho'.
|
5 Aug 2016
|
|
Contributing Member
Veteran HUBBer
|
|
Join Date: Jul 2005
Location: Wirral, England.
Posts: 5,673
|
|
Quote:
Originally Posted by ajax
Put all back together and started up without drama.
Spent about 1/2 hour breaking the rings in etc, leisure driving.
Inspected bike and can hear a hiss from the head gasket .
Stripped down bike again
Head measured straight
jug measured straight
Cosmetic head gasket, which seems a whole lot less sturdy then OEM.
Head bolts were torqued to spec. But just didn't seem tight enough.
Gonna check threads and see if any debris in head bolt chambers etc.
Going to take head to machine shop to validate, should of done that 1st I know. Kicking myself now.
Am i missing something?
Head gasket was stock size
No copper/silver spray added on install
|
Rebuilding an engine isn't as 'back shed' as many would like.
You need those mating surfaces SPOTLESS. Or at least so smooth that you can run your thumb over it and not feel any raises or notches.
Also it sounds like your head threads are tight or damaged. You can't accurately torque down a head unless the bolts are moving freely.
Tighten down the head from opposing corners turning each bolt a few turns at a time. You can count full turns of identical size bolts and see if they are winding down similar amounts when they 'Click' on your torque wrench (book procedure is best though).
I don't mean to sound patronising but are you sure your torque wrench is set correctly ? $10 torque wrenches don't cut it on engine work either.
That's assuming everything else is straight and lined up.. Are the dowel pins seated straight etc ?
__________________
Did some trips.
Rode some bikes.
Fix them for a living.
Can't say anymore.
|
6 Aug 2016
|
Registered Users
Veteran HUBBer
|
|
Join Date: Aug 2013
Posts: 149
|
|
Thanks Ted
I'm going to really go over this tomorrow.
I had done a previous head gasket on this bike without problems as well as my truck.
I did something wrong obviously.
I will do a leak down test as well this time to make sure of leaks.
Pictures are cylinder after like 10 miles or 30 mins.
Front part of cylinder seems to have some wear? I can't feel anything but its smooth with no honing marks at little over 1/2 way down.
Does this look like abnormal wear?
|
6 Aug 2016
|
|
Contributing Member
Veteran HUBBer
|
|
Join Date: Jul 2005
Location: Wirral, England.
Posts: 5,673
|
|
Is it a new piston ? Was the cylinder measured ??
Those score marks arenr what you want. If everything wasnt clean in there it could be contamination. Did it smoke ??
Sent from my G7-L01 using Tapatalk
__________________
Did some trips.
Rode some bikes.
Fix them for a living.
Can't say anymore.
|
6 Aug 2016
|
Registered Users
Veteran HUBBer
|
|
Join Date: Aug 2013
Posts: 149
|
|
New piston, slightly larger
cylinder bored to piston size
Was taken to bike shop for machining and fit
I installed rings and piston
|
Currently Active Users Viewing This Thread: 2 (0 Registered Users and/or Members and 2 guests)
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
Check the RAW segments; Grant, your HU host is on every month!
Episodes below to listen to while you, err, pretend to do something or other...
2020 Edition of Chris Scott's Adventure Motorcycling Handbook.
"Ultimate global guide for red-blooded bikers planning overseas exploration. Covers choice & preparation of best bike, shipping overseas, baggage design, riding techniques, travel health, visas, documentation, safety and useful addresses." Recommended. (Grant)
Ripcord Rescue Travel Insurance™ combines into a single integrated program the best evacuation and rescue with the premier travel insurance coverages designed for adventurers.
Led by special operations veterans, Stanford Medicine affiliated physicians, paramedics and other travel experts, Ripcord is perfect for adventure seekers, climbers, skiers, sports enthusiasts, hunters, international travelers, humanitarian efforts, expeditions and more.
Ripcord travel protection is now available for ALL nationalities, and travel is covered on motorcycles of all sizes!
What others say about HU...
"This site is the BIBLE for international bike travelers." Greg, Australia
"Thank you! The web site, The travels, The insight, The inspiration, Everything, just thanks." Colin, UK
"My friend and I are planning a trip from Singapore to England... We found (the HU) site invaluable as an aid to planning and have based a lot of our purchases (bikes, riding gear, etc.) on what we have learned from this site." Phil, Australia
"I for one always had an adventurous spirit, but you and Susan lit the fire for my trip and I'll be forever grateful for what you two do to inspire others to just do it." Brent, USA
"Your website is a mecca of valuable information and the (video) series is informative, entertaining, and inspiring!" Jennifer, Canada
"Your worldwide organisation and events are the Go To places to for all serious touring and aspiring touring bikers." Trevor, South Africa
"This is the answer to all my questions." Haydn, Australia
"Keep going the excellent work you are doing for Horizons Unlimited - I love it!" Thomas, Germany
Lots more comments here!
Diaries of a compulsive traveller
by Graham Field
Book, eBook, Audiobook
"A compelling, honest, inspiring and entertaining writing style with a built-in feel-good factor" Get them NOW from the authors' website and Amazon.com, Amazon.ca, Amazon.co.uk.
Back Road Map Books and Backroad GPS Maps for all of Canada - a must have!
New to Horizons Unlimited?
New to motorcycle travelling? New to the HU site? Confused? Too many options? It's really very simple - just 4 easy steps!
Horizons Unlimited was founded in 1997 by Grant and Susan Johnson following their journey around the world on a BMW R80G/S.
Read more about Grant & Susan's story
Membership - help keep us going!
Horizons Unlimited is not a big multi-national company, just two people who love motorcycle travel and have grown what started as a hobby in 1997 into a full time job (usually 8-10 hours per day and 7 days a week) and a labour of love. To keep it going and a roof over our heads, we run events all over the world with the help of volunteers; we sell inspirational and informative DVDs; we have a few selected advertisers; and we make a small amount from memberships.
You don't have to be a Member to come to an HU meeting, access the website, or ask questions on the HUBB. What you get for your membership contribution is our sincere gratitude, good karma and knowing that you're helping to keep the motorcycle travel dream alive. Contributing Members and Gold Members do get additional features on the HUBB. Here's a list of all the Member benefits on the HUBB.
|
|
|