Pushrod Adjustment

[Raywood]

Here are the pages from the BDM service manual.
I had to do it several times to get the knack of it but once you do it's pretty easy. You just need someone else to help rotate the tire while you monitor the lifter travel. I used a ruler to ensure the lifter was at it's highest travel.

BDM adjustment;

 

[scubaman15]

Very good thanks !!!!!!!!!

 

[Raywood]

ray, you should loose that first page. or make note of it.

its the adjustment for the tappets with the hl2t limiters installed which isnt oem to Bigdog.

Good point. Will do. :2thumbs:

 

[Thumper]

Good point. Will do. :2thumbs:

Oh sure, what about us guys with the limiters

 

[MARV]

Oh sure, what about us guys with the limiters

i believe yours came with instructions.

just like mine. :up:

 

[chomper]

push rod re-install

Might be too simple but, When I took my heads off I slowly loosened my rockers I didnt touch any adjustments on my pushrods , they just slid up through the head when re- installing them can I slowly tighten the rockers down ensuring my pushrod adjustments are the same as before I tore down the engine

 

[Raywood]

Might be too simple but, When I took my heads off I slowly loosened my rockers I didnt touch any adjustments on my pushrods , they just slid up through the head when re- installing them can I slowly tighten the rockers down ensuring my pushrod adjustments are the same as before I tore down the engine

Depends on what you did with the heads. Did you just have a valve job done? Did you have the heads or cylinders decked? Did you put a new cam in it?

 

[Fibersnake]

Might be too simple but, When I took my heads off I slowly loosened my rockers I didnt touch any adjustments on my pushrods , they just slid up through the head when re- installing them can I slowly tighten the rockers down ensuring my pushrod adjustments are the same as before I tore down the engine

Well that is interesting, however since it appears that you are working the heads or in short doing some major engine work, I would take the extra time and make sure that the push rods are adjusted properly. It would be a shame to do all that work and have it for naught due to a sticking tappets, improperly torque rocker, bent push rod from being jammed, etc.

Just not worth the risk that could arise for the little amount of time involved consider the work you are doing. Just my 2 cents!

 

[chomper]

I have an 03 pitbull I tore the top end down to powder coat clen and make sure everything is squared away...mechanically I have no problem..sometimes people are a little to cautious..its a machine it goes back together the way it came apart..can also save buku dollars...but for some reason push rods and valves are "Supermans Cryptonite" to me..can do some major damage..once I see it done once I'm OK ..Have a friend who builds bikes coming over to do them this weekend..have to wear my cape..maybe overcome the pushrod phobia..Snake your 2cents might save me $$$$...P.S. Raywood your top end rip down..very instrumental...thanks...I LOVE THIS SITE.

 

[chomper]

just got done putting my top end together today..just a heads up to anyone interested...found a gray area beteen BDM pushrod adjustment and that in the S&S manual...BDM line 6 of pushrod adjustment says 4 turns from 0, which is also 24 flats..bleed down the tappets and tighten. My S&S manual says 4 turns from 0 24 flats, but after bleed down go back one full turn which in fact is 3 turns or 18 flats. I' m sure the difference is minescule but it might clear some confusion to some..I went with the S&S manual, I liked the play I had in the pushrod ..not to tight not to loose..hope this helped someone confused...

 

[chacha]

I use the S&S procedure and have been happy with it....

 

[zenbiker]

Here are the pages from the BDM service manual.
I had to do it several times to get the knack of it but once you do it's pretty easy. You just need someone else to help rotate the tire while you monitor the lifter travel. I used a ruler to ensure the lifter was at it's highest travel.

BDM adjustment;

I see no link!

 

[Mr. Wright]

Yea, I clicked on something of Ray's the other day. I think his whole photo bucket was on there, and not one of them pertained to what he was talking about.

 

[Hurricane6767]

I have a 2008 BD k9, where would I find the Manuel, and the S&S Manuel???

 

[Mikeinjersey]

I have a 2008 BD k9, where would I find the Manuel, and the S&S Manuel???

Look on the post #13 Mr. Wright for most of what you will need. Welcome from NJ !!

 

[Mr. Wright]

I have a 2008 BD k9, where would I find the Manuel, and the S&S Manuel???

Dropbox

www.dropbox.com

 

[Doogan]

Not very experienced on the S&S 117. Are these engines noisy? Is it normal to have a lot of valve train tapped noise? Going to perform the valve adjustment per S&S, but not sure what to expect.

 

[HMAN]

Not very experienced on the S&S 117. Are these engines noisy? Is it normal to have a lot of valve train tapped noise? Going to perform the valve adjustment per S&S, but not sure what to expect.

These aint quiet motors. Some noise is to be expected. Do the adjustment and compare.

 

[john sachs]

Not trying to be a NAY-SAYER. But the fastest way to do MAJOR engine damage, is to make even a slight mistake, when adjusting push rods, turning an engine over, with mis-adjusted push rods ,or starting an engine with mis-adjusted push rods. There are a few areas to make mistakes on.
1- Top dead center on the cylinder you are working on, needs to be on the compression stroke.
2- Lifter bleed down. It's easy to open the valve you're adjusting into the piston.
3- The amount of turns on the push rod vs. threads per inch.
4- Travel limiters .
5- Are the lifters pumped up(loaded with oil) or new lifters being installed. Soaking them in oil, probably won't fill them enough.
6- I'm not familiar with the instructions out there, but if you have never adjusted push rods before, it would be well worth $$$$ having someone , who is, look over your shoulder.
7- It's possible I may have left somethings out.
John

 

[Doogan]

Appreciate it John. I will say that I have never adjusted pushrods on a twin, but have successfully built numerous naturally aspirated motors between 650-980hp. I will follow S&S’s manual since I have not performed it before, and I appreciate you looking Out for me.