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#996706 - 09/12/17 04:16 PM Engine smokes at startup - Valve stem seals?
Lone_RT_rider Offline
Member

Registered: 07/22/00
Posts: 5893
Loc: Germantown, WI
So, my 1999 R1100RT with 105K miles has always been a bit smokey, but lately it's progressively getting worse. I won't even start up the bike in the garage unless the tailpipe is pointed in the right direction. My first instinct is the valve stem seals. I have changed those in old american V-8 engines before (pressurize cylinder, press down valve spring with correct valve spring tool, pull keepers, , remove spring and replace seal. Then reverse removal process for installation). Is the process basically the same?

I have not done a compression check, but she runs damned strong. Also, I am not leaving it on the side stand, it gets left on the center stand most all times, even at work.

Any ideas?

And no, I don't want to start an oil thread. laugh

Shawn

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#996707 - 09/12/17 04:30 PM Re: Engine smokes at startup - Valve stem seals? [Re: Lone_RT_rider]
dirtrider Offline
The Oracle
Member

Registered: 06/05/10
Posts: 13014
Loc: Ohio
Originally Posted By: Lone_RT_rider
So, my 1999 R1100RT with 105K miles has always been a bit smokey, but lately it's progressively getting worse. I won't even start up the bike in the garage unless the tailpipe is pointed in the right direction. My first instinct is the valve stem seals. I have changed those in old american V-8 engines before (pressurize cylinder, press down valve spring with correct valve spring tool, pull keepers, , remove spring and replace seal. Then reverse removal process for installation). Is the process basically the same?

I have not done a compression check, but she runs damned strong. Also, I am not leaving it on the side stand, it gets left on the center stand most all times, even at work.

Any ideas?

And no, I don't want to start an oil thread. laugh



Afternoon Shawn

On the old high mile BMW boxers it is usually the rings that cause start-up oil burning.

You can still have good compression but weak oil control rings.

Valve seal replacement is as you wrote above.

Try parking bike on the center stand to see if start-up oil smoke gets better.
_________________________
D.R. ___
Sent from my rotory dial wall phone!

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#996710 - 09/12/17 04:58 PM Re: Engine smokes at startup - Valve stem seals? [Re: dirtrider]
Lone_RT_rider Offline
Member

Registered: 07/22/00
Posts: 5893
Loc: Germantown, WI
Originally Posted By: dirtrider
Try parking bike on the center stand to see if start-up oil smoke gets better.


Thanks for the quick reply. I only park the bike on the center stand, so I am probably seeing the best it can get at this point. Replacing rings is not something I have time for currently, so that will go low on the project list. I will just keep adding oil. smile

Shawn

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#996713 - 09/12/17 05:37 PM Re: Engine smokes at startup - Valve stem seals? [Re: dirtrider]
Michaelr11 Offline
Member

Registered: 09/25/03
Posts: 734
Loc: Trinity, NC
Before you park on the center stand, while still sitting on the bike, lean the bike over to the right. Put the bike on the side stand, then put it up on the center stand.
_________________________
Michael Stock, Trinity NC
01 R1100RT, R60/6, R100

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#996720 - 09/12/17 07:07 PM Re: Engine smokes at startup - Valve stem seals? [Re: dirtrider]
tvpierce Offline
Member

Registered: 04/29/08
Posts: 282
Loc: Maine
Originally Posted By: dirtrider
Originally Posted By: Lone_RT_rider
So, my 1999 R1100RT with 105K miles has always been a bit smokey, but lately it's progressively getting worse. I won't even start up the bike in the garage unless the tailpipe is pointed in the right direction. My first instinct is the valve stem seals. I have changed those in old american V-8 engines before (pressurize cylinder, press down valve spring with correct valve spring tool, pull keepers, , remove spring and replace seal. Then reverse removal process for installation). Is the process basically the same?

I have not done a compression check, but she runs damned strong. Also, I am not leaving it on the side stand, it gets left on the center stand most all times, even at work.

Any ideas?

And no, I don't want to start an oil thread. laugh



Afternoon Shawn

On the old high mile BMW boxers it is usually the rings that cause start-up oil burning.

You can still have good compression but weak oil control rings.

Valve seal replacement is as you wrote above.

Try parking bike on the center stand to see if start-up oil smoke gets better.



Is the problem generally that the oil control rings are worn, or gunked-up with deposits?
_________________________
Jeff Pierce

'96 R1100RT
'79 Honda CX500



"The problem with quotes on the internet is that it's darn near impossible to verify their authenticity." Abraham Lincoln

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#996722 - 09/12/17 08:20 PM Re: Engine smokes at startup - Valve stem seals? [Re: Lone_RT_rider]
tallman Offline
Picture Perfect Humorist
Member

Registered: 12/22/02
Posts: 19614
Loc: Tallahassee, Florida
Any other symptoms?
If not...oil cheap.
_________________________
If my mind wanders, should I follow it?
Tim
Conch Town Krewe
2003 K 1200 GT
1996 R 100 RSL
1980 R 100 RT
1972 R 75
1968 R 50
All now gone...


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#996728 - 09/12/17 09:16 PM Re: Engine smokes at startup - Valve stem seals? [Re: tallman]
Lone_RT_rider Offline
Member

Registered: 07/22/00
Posts: 5893
Loc: Germantown, WI
Originally Posted By: tallman
Any other symptoms?
If not...oil cheap.


Just that all that oil will probably take out the catalytic converter over a while. Other than that, she just keeps plugging along. smile

Shawn

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#996729 - 09/12/17 09:30 PM Re: Engine smokes at startup - Valve stem seals? [Re: Lone_RT_rider]
dirtrider Offline
The Oracle
Member

Registered: 06/05/10
Posts: 13014
Loc: Ohio
Originally Posted By: Lone_RT_rider
Originally Posted By: tallman
Any other symptoms?
If not...oil cheap.


Just that all that oil will probably take out the catalytic converter over a while. Other than that, she just keeps plugging along. smile

Shawn


At 105k your cat is probably already DOA.
_________________________
D.R. ___
Sent from my rotory dial wall phone!

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#996733 - 09/12/17 11:17 PM Re: Engine smokes at startup - Valve stem seals? [Re: tvpierce]
Michaelr11 Offline
Member

Registered: 09/25/03
Posts: 734
Loc: Trinity, NC
A tank full of gas treated with Techron couldn't hurt.
_________________________
Michael Stock, Trinity NC
01 R1100RT, R60/6, R100

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#996764 - 09/13/17 01:30 PM Re: Engine smokes at startup - Valve stem seals? [Re: dirtrider]
tallman Offline
Picture Perfect Humorist
Member

Registered: 12/22/02
Posts: 19614
Loc: Tallahassee, Florida
Originally Posted By: dirtrider
Originally Posted By: Lone_RT_rider
Originally Posted By: tallman
Any other symptoms?
If not...oil cheap.


Just that all that oil will probably take out the catalytic converter over a while. Other than that, she just keeps plugging along. smile

Shawn


At 105k your cat is probably already DOA.


lurk
_________________________
If my mind wanders, should I follow it?
Tim
Conch Town Krewe
2003 K 1200 GT
1996 R 100 RSL
1980 R 100 RT
1972 R 75
1968 R 50
All now gone...


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