18 Aug 22, 02:53 am

Recent Posts

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11
Maintenance, Servicing, and Mechanical issues / Re: Cracked headers
« Last post by Sidewinder on Yesterday at 04:05:04 pm »
Yeah the shoulder is part of the stud on the OE ones.  You can get SS ones of the same type squaredeals do em.  The ones you ordered are more generic type.
Do the shoulders make a difference? not sure, i mean they are (maybe partly?) there to stop you putting em in the head too far, but i'm not sure if they also act as a spacer/washer between the head face and the header flange face?
Just looked on mine (2007) and the stud's shoulder is not visible. Do the holes in the header flanges fit over the shoulders on the stud?  Try passing a shouldered stud thru the header flange hole, if it clears it easy i'd say the studs you bought should be fine as the shoulder is only a 'stop' when screwing into the head.  If not then the shoulder is some sort of spacer and could be important to have.
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Maintenance, Servicing, and Mechanical issues / Re: Cracked headers
« Last post by leighz on Yesterday at 01:39:37 pm »
the ones I ordered look more like this:



will that work?
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Maintenance, Servicing, and Mechanical issues / Re: Cracked headers
« Last post by leighz on Yesterday at 01:36:24 pm »
you can see it here:



maybe a shoulder rather than a washer as it doesn't seem to move even with a little persuasion

and up against the cylinder head:

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Maintenance, Servicing, and Mechanical issues / Re: Cracked headers
« Last post by Sidewinder on Yesterday at 11:05:43 am »
You need to read a bit more, as galvanic corrosion depends on relative size of anode/cathode too, so say a small SS bolt in a large block of ally is much less of a problem with GC.  A smear of proper lube on the threads will reduce the risk to negligible.  Same same with SS bolts n nuts automatically galling and seizing if put together, it's rubbish, you just have to take the proper precautions like not going too fast, using lube, not over tightening etc.

In metallurgy and materials science there are very few situational absolutes and everything is dependent upon exact conditions.  So when you see sweeping statements on the internet about stuff like this it's mostly cos the person has no idea what they are on about.

What part do you mean, there are no M8 washers between block and headers.
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Maintenance, Servicing, and Mechanical issues / Re: Cracked headers
« Last post by leighz on Yesterday at 08:49:06 am »
while I'm at it - the little M8 washers between the header and the cylinder head - what are they made of? Can see them on a parts list eg:

https://www.fowlersparts.co.uk/parts/5855152/tiger-sport-from-vin-570059-to-750469/exhaust-system
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Maintenance, Servicing, and Mechanical issues / Cracked headers
« Last post by leighz on Yesterday at 08:47:07 am »
What better way to spend one of the hottest days of the year? Removing cracked headers!





The last one took a 12mm socket hammered on to get out - which brought the stud with it. Two of the studs need replacing so I ordered some stainless studs and nuts thinking that would stop the corrosion. Then I read about galvanic corrosion between stainless steel and aluminium alloys. And how if the stainless stud snaps in future (more brittle also apparently) then it's a world of hurt removing them as they're significantly harder than mild steel to drill out.

So - will copper slip on the stud prevent galvanic corrosion? Should I just send the stainless studs back and order regular steel studs?
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Suspension and Chassis Set-up and Mods / Re: Fork suspension
« Last post by Davdundrod on Yesterday at 03:14:22 am »
Thank you Kiwi60, very helpful. Thats what i like about this group, people like you !
19
New Members / Re: New member
« Last post by Konepyörämies on 16 August, 2022, 10:14:15 pm »
 :401: :028:
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New Members / Re: Dutch Tiger Rider
« Last post by Konepyörämies on 16 August, 2022, 10:08:02 pm »
 :401: :028:
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reconstruction