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Topic-icon Installing Push Rod Tubes

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8 months 4 weeks ago #3401 by Wobbly
Replied by Wobbly on topic Installing Push Rod Tubes
It used to be standard shop practice to drive the PR tubes into the seals 1 or 2mm rather than replace them at the first signs of leakage. Trouble is, no one ever thinks to drive them back out again.

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8 months 4 weeks ago #3402 by 12990
Replied by 12990 on topic Installing Push Rod Tubes
Hey Wobbly (is that a reference to a SWB /5?)
So whaddaya think? Green loc-tite 'em and go for it, or is the no heat drive-ability a problem warranting new tubes?

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8 months 4 weeks ago #3403 by Wobbly
Replied by Wobbly on topic Installing Push Rod Tubes
• I believe the installation of the PR tubes that we've been discussing is common to all /5 and later Airheads.

• Most of the LocTite thread lockers turn loose at elevated temperatures, so I don't think this is a good application for any of them. Now, LocTite sealants (aka "gasket makers" like 510) might be another story entirely. I'm simply not familiar enough with the PR tube details to answer.

...or is the no heat drive-ability a problem warranting new tubes?

Sorry, I'm not following your thought process in this statement. Are you talking about driving the PR tubes in/out, or driving the bike after everything is assembled ?

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8 months 4 weeks ago #3404 by 8166
Replied by 8166 on topic Installing Push Rod Tubes
Driving pushrod tube collars down the tube stopped when BMW started supplying one piece pushrod tubes, and that's been a looooooong time. Try that with today's tubes and you're very likely to end up with a leak at the cylinder head end.

I've used green wicking Loctite at the cylinder end for the last two pair of pushrod tubes I've replaced. No leaks so far. Maybe it helps, but it sure as heck doesn't hurt. Belt and suspenders, ya know...

8166 Scot Marburger, This email address is being protected from spambots. You need JavaScript enabled to view it.
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8 months 3 weeks ago #3406 by 12990
Replied by 12990 on topic Installing Push Rod Tubes
Yeh, sorry Wobbly - Drive-ability was the wrong word here: (I tend to make up words that only make sense to me)
I was concerned about the ability to move (drive) the push rod tubes with no heat - since most of what I've seen indicates they're a pain in the ass even WITH heat.
Thanks Scott, - I'm leaning toward trying the Loctite 290. If it doesn't work and I have to do the job again, it'll be an excuse to mic the whole thing out and check the bottom end while I'm in there.
I'll letcha guys know what happens.

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7 months 1 week ago #3587 by afish
Replied by afish on topic Installing Push Rod Tubes
I used a drift I purchased from Bench Mark Works and I was able to make adjustments easily without heating the cylinder.

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