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Author Topic: cylinder bolts and Valve adjustment?  (Read 4452 times)

weasel01

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cylinder bolts and Valve adjustment?
« on: July 02, 2009, 06:26:08 PM »
Satisfied and empowered by my recent spline lube / boot replacement
success I'm moving on to the engine.
I want to re-torque the cylinders and adjust the valves...
I have read the clymer several times and also snowbum on this subject but have never done anything like this before.
Am I opening a can I wont be able to close or is it as straight forward as the rear end turned out to be?
Anything to look out for?

Offline Bob_Roller

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Re: cylinder bolts and Valve adjustment?
« Reply #1 on: July 02, 2009, 06:37:36 PM »
It's a straight forward job, you do need a torque wrench to do the job .

I don't know what manual you are working from, but the cylinder head nut torque has been reduced from 29 ft/lbs to I believe 24 ft/lbs., and this is accomplished in three steps .

Also there is a torque sequence for the nuts, should be stated in your manual .

All of this, including the valve clearance check and adjustment is done on a 'cold' engine .
'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 !!!!!

weasel01

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Re: cylinder bolts and Valve adjustment?
« Reply #2 on: July 02, 2009, 06:45:38 PM »
I received my new rocker box gaskets today is there an inside /outside to those?
They are printed on one side but not the other?

weasel01

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Re: cylinder bolts and Valve adjustment?
« Reply #3 on: July 02, 2009, 06:49:12 PM »
Also I dont have a feeler gauge set yet.
Is there a better choice in terms of brand or will a general purpose style be ok like from an automotive shop?
I already have a good torque wrench.

Offline Bob_Roller

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Re: cylinder bolts and Valve adjustment?
« Reply #4 on: July 02, 2009, 06:53:47 PM »
Any kind of flat feeler gauges will work .

I don't think there is a left or right valve cover gasket, been 13 years since I got a set of rubber gaskets .
« Last Edit: July 02, 2009, 06:55:00 PM by Bob_Roller »
'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 !!!!!

benita

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Re: cylinder bolts and Valve adjustment?
« Reply #5 on: July 02, 2009, 07:03:55 PM »
If you guys have access to this months issue of BMW OWNERS CLUB OF AMERICA monthly magazine called BMW ON.There is a detailed step by step article with pictures no less, on how to do a valve adjustment the ''right'' way.It shows you how to tighten up rocker arm slop,retorque heads,then do the valve adjustment

weasel01

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Re: cylinder bolts and Valve adjustment?
« Reply #6 on: July 02, 2009, 07:06:11 PM »
Is that a printed magazine or is it online somewhere?

weasel01

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Re: cylinder bolts and Valve adjustment?
« Reply #7 on: July 02, 2009, 07:06:41 PM »
me do gooder with pictures...

benita

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Re: cylinder bolts and Valve adjustment?
« Reply #8 on: July 02, 2009, 07:26:27 PM »
Its a printed magazine that is put out monthly by BMW owners of america club.I tell you, the magazine alone is worth the price of joining.A wealth of information is to be had.

Offline montmil

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Re: cylinder bolts and Valve adjustment?
« Reply #9 on: July 02, 2009, 08:26:53 PM »
"I want to re-torque the cylinders and adjust the valves...Anything to look out for?"

You can do it, Ampy.

Like Bob said..."I don't know what manual you are working from, but the cylinder head nut torque has been reduced from 29 ft/lbs to I believe 24 ft/lbs., and this is accomplished in three steps. Also there is a torque sequence for the nuts, should be stated in your manual."

Lemme see here... Set .002" on the intakes and .004" on the exhaust. Disregard anything different you may read in the manuals. You want to end up with a wee bit of BMW Music. Tappity tappity.

No in-or-out side to the rocker box gaskets. And do be gentle with the center stud torque and the two 10mm nuts on each end of the cover. I don't use the torque wrench on mine. Just snug 'em up with a short-handled wrench.

IIRC, one of the cylinder head bolts is a bit difficult to reach. Seems the rocker shaft and associated stuff is an small obstacle.

Be sure to rotate the cold engine 180 degrees after setting the valves on one side! You can watch for the on-top mark through the timing hole near the dipstick. You'll then be able to rattle by hand and confirm the TDC valves.

Feeler gauge should be snug between the rocker tip and the valve head. Not crushed down so tight that you can't remove it. In removing the feeler gauge, a fairly firm yet smooth pull ought to be about right. It's something you'll learn by doing. Better a tiny bit loose than risking burning an exhaust valve.

Monte




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

weasel01

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Re: cylinder bolts and Valve adjustment?
« Reply #10 on: July 02, 2009, 09:46:49 PM »
okay, I'm doin' it. I've removed rocker covers, loosened each head bolt in the appropriate pattern 1/4 turn, retorqued in 3 steps to 25ft/lb. have rotated back wheel and in fifth gear. watched the intake valve close, look in the hole in transmission. my question is...the is OT and then a line above OT, do I align OT or the line above OT with the mark on my transmission?

Offline Justin B.

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Re: cylinder bolts and Valve adjustment?
« Reply #11 on: July 03, 2009, 12:44:14 AM »
.002/.004 sounds a bit tight, or it's been so long I can't remember...
Justin B.

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

Offline montmil

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Re: cylinder bolts and Valve adjustment?
« Reply #12 on: July 03, 2009, 07:26:59 AM »
Oops! I believe I should have said .004 and .008 intake and exhaust. Ain't that more right? I looked at my smashed feeler gauge to confirm. Thanks, J.

Hey, Ampy... you catching this?  :-[
OT is BMW-speak for On Top. As in, Top Dead Center (TDC).

Monte
« Last Edit: July 03, 2009, 07:29:32 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.

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Re: cylinder bolts and Valve adjustment?
« Reply #13 on: July 03, 2009, 09:45:07 AM »
The owners manual I have says .006 (exh) and .04 (int).  I think I have also seen .008/.006 mentioned elsewhere as well...
Justin B.

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

weasel01

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Re: cylinder bolts and Valve adjustment?
« Reply #14 on: July 03, 2009, 12:26:43 PM »
So I did the deed last night...and it was straight forward but now I'm hung up on gaps.

My manual states .004 intake  .008 exhaust.

So thats what I did I also torqued the nuts to 13 ft/lbs.

You guys mentioned .004 & .006

Snowbum recomends .006 &.010 for the R65?