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Old 03-16-2014, 08:06 AM   #1
devildogg OP
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cylinder base O-ring querry

Changing the push rod seals today, This doesn't seem normal to come off like this

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Old 03-16-2014, 08:17 AM   #2
AliBaba
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Some kind of sealant?

BMW went back and forth with o-rings/sealant before they ended up with no o-ring. 3-bond only.
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Old 03-16-2014, 08:43 AM   #3
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Way too much sealant. Use the O-rings. Large and small. They work best.
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Old 03-16-2014, 09:32 AM   #4
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Originally Posted by supershaft View Post
Way too much sealant. Use the O-rings. Large and small. They work best.
Have new O- rings for both the PO gave me two large o-rings, white in colour I figured they would have been black, bought new little ones
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Old 03-16-2014, 01:31 PM   #5
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There are two different sizes available. Many are not aware of that. Colors? Grey or black?
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Old 03-16-2014, 07:20 PM   #6
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There are two different sizes available. Many are not aware of that. Colors? Grey or black?
I should have mentioned this is a 1977 R110S there does not appear to a groove for any O-ring on the cylinder base and I noticed that after 1980 the top end kits came with 0-rings but before 1980 they do not should I forgo the O-ring and use some sort of sealant??
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Old 03-16-2014, 07:50 PM   #7
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No groove is Hondabond and the little O rings only. Make sure all the old sealant is out and none is left in the oil passages.

After you get the top end back together...leave the valve covers off when you start the engine..and after 30 seconds or so, you should (better) see oil streaming out of the top of each rocker arm...4 streams. At least then you know the oil passages are clear.

Clean up the mess, assemble and go for a short half hour ride to warm everything up...let sit overnight to cool down and retorque, set valves and check the valves in 500 miles.

At least that's what I've been doing for a few years
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Old 03-16-2014, 08:02 PM   #8
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Originally Posted by Beemerguru View Post
No groove is Hondabond and the little O rings only. Make sure all the old sealant is out and none is left in the oil passages.

After you get the top end back together...leave the valve covers off when you start the engine..and after 30 seconds or so, you should (better) see oil streaming out of the top of each rocker arm...4 streams. At least then you know the oil passages are clear.

Clean up the mess, assemble and go for a short half hour ride to warm everything up...let sit overnight to cool down and retorque, set valves and check the valves in 500 miles.

At least that's what I've been doing for a few years
Thanks, damn someone here always knows the answer
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