The member photo gallery is now integrated and live!!  All user albums and pictures have been ported from old gallery.


To register send an e-mail to admin@bmwr65.org and provide your location and desired user name.

Author Topic: Push Rod Tube Grommets  (Read 1306 times)

Offline montmil

  • Mt. Olympus Resident
  • ****
  • Posts: 8371
Push Rod Tube Grommets
« on: December 13, 2015, 05:11:18 PM »
Handled this chore on the 1981 R65 several months ago so now...

On the 1978 R100S, one danged grommet has gone from weepy to seepy and I don't need leaky. I will remove the jugs and replace all four PR tube grommets. All required gaskets and o-rings on hand. Plus,

A new AGM battery arrives Tuesday. On a battery tender, the wet cell lasted but 28 months, enduring Bob Roller-style garage temperatures. Removing the OEM-size battery requires detaching the sub frame's upper bolts and tilting the battery box to the rear -after removing a couple batt box attach nuts. The AGM has slightly smaller dimensions that will be appreciated. It's also 9.5 pounds lighter.

But that rear fender sure needs some love. Off it comes for a cosmetic overhaul and repaint. May as well replace that scruffy fender attach hardware as long as I'm in there.

Just one little seepy grommet. And so it goes.
Monte Miller
Denton, TEXAS
1978 BMW R100S
1981 BMW R65
1983 BMW R65
1995 Triumph Trophy
1986 VW Cabriolet

Offline Barry

  • Mt. Olympus Resident
  • ****
  • Posts: 5143
Re: Push Rod Tube Grommets
« Reply #1 on: December 14, 2015, 05:23:39 AM »
9.5lbs is a handy lump of weight to save.

The bike will be faster !
Barry Cheshire, England 79 R45

Offline Bob_Roller

  • Global Moderator
  • Mt. Olympus Resident
  • *****
  • Posts: 9122
  • -7 hours GMT
Re: Push Rod Tube Grommets
« Reply #2 on: December 14, 2015, 02:38:46 PM »
Monti, what brand battery was it ??
28 months, not bad for the heat aspect .
It's just amazing how heat destroys a battery !!!!
In a more temperate climate, you get a bit of notice that the battery is coming to the end of it's service life, with this heat, they just die, no warning .
'81 R65
'82 R65 LS
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Offline Barry

  • Mt. Olympus Resident
  • ****
  • Posts: 5143
Re: Push Rod Tube Grommets
« Reply #3 on: December 14, 2015, 03:35:29 PM »
They say a batteries life is halved for every 15 Deg F increase in temperature and the damage is irreversible. Not much you can do about it except park in the shade but I guess you always try to do that anyway in a hot climate.
Barry Cheshire, England 79 R45

Offline montmil

  • Mt. Olympus Resident
  • ****
  • Posts: 8371
Re: Push Rod Tube Grommets
« Reply #4 on: December 14, 2015, 04:41:26 PM »
Roller Bob: The battery was a wet Yuasa 28Ah spec'd for the Airhead. I broke it in using Snowbum's 24-hour bench set up prior to installing in the bike. Battery was a happy camper until two weeks ago.

Barry H: Not sure what the baseline temp is from the manufacturer but even with the shop ventilated to ambient air and a fan circulating the hot air, temps frequently hit 110-115 degrees F in the l-o-n-g Texas summers.

The new AGM from Staab is a 22Ah. Should wind up the 100S just fine.

New battery due to arrive tomorrow. I'm also firing up the big smoker to do a brisket, rack of pork ribs and a whole chicken. Also will begin the removal of the 100S' jugs. Should be a fun day as Pretty Wife is heading to CowTown to visit her sister. I'll be alone and unsupervised!

Monte Miller
Denton, TEXAS
1978 BMW R100S
1981 BMW R65
1983 BMW R65
1995 Triumph Trophy
1986 VW Cabriolet

Offline DeeG

  • Lives in Foothills of Mt. Olympus
  • **
  • Posts: 226
Re: Push Rod Tube Grommets
« Reply #5 on: December 24, 2015, 07:59:51 AM »
I did a bunch of R & R work on 76 R90 two winters ago, brand new push rod seals leaked. grrr... Ended up putting some Halomar on it.  Used it on the cylinder sleeves as well.  Stopped the seepage. Killed me to have to do it.  I hate having to use stuff like that.
Dee G
1978 R45/N ?
1978 R80 w/hack
1971 R75 (swb)

Offline montmil

  • Mt. Olympus Resident
  • ****
  • Posts: 8371
Re: Push Rod Tube Grommets
« Reply #6 on: December 24, 2015, 08:38:44 AM »
Sometimes, DeeG, you just have to do what you have to do. Totally understand.
« Last Edit: December 24, 2015, 08:39:24 AM by montmil »
Monte Miller
Denton, TEXAS
1978 BMW R100S
1981 BMW R65
1983 BMW R65
1995 Triumph Trophy
1986 VW Cabriolet

Offline Justin B.

  • Administrator
  • Mt. Olympus Resident
  • *****
  • Posts: 5983
  • I love my Beemers
Re: Push Rod Tube Grommets
« Reply #7 on: December 24, 2015, 11:46:40 PM »
I put an R65 battery-box in my R100 and the Universal 20 AH AGM battery from Staab slides in and out without a hitch!  ;D
« Last Edit: December 25, 2015, 12:53:59 PM by admin »
Justin B.

2004 BMW R1150RT
1981 R100RT - Summer bike, NEKKID!!!

Offline montmil

  • Mt. Olympus Resident
  • ****
  • Posts: 8371
Re: Push Rod Tube Grommets
« Reply #8 on: December 26, 2015, 09:25:43 AM »
Quote
I put an R65 battery-box in my R100 and the Universal 20 AH AGM battery from Staab slides in and out without a hitch!  ;D

Had I known this, I might have gone that way. As it is, the new AGM is the same height and length as the OEM bed-wetter. Thinner by about 1.25-inches. The battery hold down clamp grips the new battery quite securely. Had previously removed acid-induced rust from the battery box and repainted it. Fortunately, no issues from the dead wet one.
Monte Miller
Denton, TEXAS
1978 BMW R100S
1981 BMW R65
1983 BMW R65
1995 Triumph Trophy
1986 VW Cabriolet

Offline Justin B.

  • Administrator
  • Mt. Olympus Resident
  • *****
  • Posts: 5983
  • I love my Beemers
Re: Push Rod Tube Grommets
« Reply #9 on: December 26, 2015, 12:20:54 PM »
The R65 boxes make a perfect replacement when using an AGM battery.
Justin B.

2004 BMW R1150RT
1981 R100RT - Summer bike, NEKKID!!!