R100GSPD '93 Noisy Valves..

[(RIP) Bin Ridin]

Here is what the followers look like..again it surprises me how worn these are.
Maybe not enough attention to oil changes, or maybe much higher kms than the 50K on the clock.

 

[(RIP) Bin Ridin]

Eek. Yep, all of those bearings/pins are toast!

Those Gudgeon pins are waaay worse than mine were, would be v surprised if you get away without a small end bearing change - since the rods are out anyway why not get it done, will be a cheap job from an engine shop. Peace of mind and all that?

Hi,

Fitting the pins in so the piston area is in the small end gives a reasonable fit by feel. I don't know who I would get to rebush the rods here in Dublin, so will have to see how it goes. Want to hear what the engine is like after this, if still clattery, I will be looking for a new cam.

 

[solidstate100]

Hi,

Fitting the pins in so the piston area is in the small end gives a reasonable fit by feel. I don't know who I would get to rebush the rods here in Dublin, so will have to see how it goes. Want to hear what the engine is like after this, if still clattery, I will be looking for a new cam.

Fair do's. Are you able to see the lobes on the cam get an idea of wear there - it looks (from the pictures anyway) that the wearing face of the follower (where it contacts the lobe) isnt in to bad a shape so hopefully it might be ok. I reckon you may be right - poor oil/infrequently changed maybe low oil level as well can do that to an engine

 

[cookie]

incorrectly fitted oil filter chamber shim/o ring /gasket?

i've seen way worse followers though.

 

[DrFarkoff]

Perhaps worth dropping the sump Bin??

I certainly would be doing so!

Post 71 here

 

[(RIP) Bin Ridin]

Hi,

Bike is not bad other than this mech noise prob, and I can see the crank pins and cam lobes look fine, so going to button it back. I have got the loose piece of the shell locating lug and the rods are fine. Tell me "I told you so" in about a week's time....

 

[(RIP) Bin Ridin]

Hi, buttoned back up with new BE shells, cam followers and gudgeon pins. Shimmed the rocker endfloat a bit tighter, set the valves, started her up and thank Dog, a lot quieter. Not as quiet as I would like but good enough. I think this cam is a mad yoke.

Compression 160psi on each side so well pleased with that.

Solodstate100, if you do check the valve clearances on your bike, please let me know whether tappet clearance is wider when opposite valve is open than at tdc on firing stroke.

Bin

 

[Two wheels good]

Thanks for taking the trouble to put up photos; very interesting.
With that wear on the shells did you have any concern for the condition of the crankshaft journals?

 

[solidstate100]

Solodstate100, if you do check the valve clearances on your bike, please let me know whether tappet clearance is wider when opposite valve is open than at tdc on firing stroke.

Bin

Yep, the clearance increases - RH exhaust set to .20, increased to at least .35. Happens each side, inlet and exhaust. I only bothered to measure the 1 exhaust, but others clearances were noticeable to the eye. Weird...

 

[(RIP) Bin Ridin]

Thanks for taking the trouble to put up photos; very interesting.
With that wear on the shells did you have any concern for the condition of the crankshaft journals?

Hi, journals were fine, as were cam lobes. The new pins were a neat fit in the small ends too, so all that is good. I kicked it until oil came up at rockers.

Idles like a clock, need to balance the butterflies, gadget is in Riyadh - next time....

 

[(RIP) Bin Ridin]

Yep, the clearance increases - RH exhaust set to .20, increased to at least .35. Happens each side, inlet and exhaust. I only bothered to measure the 1 exhaust, but others clearances were noticeable to the eye. Weird...

What year and model is the bike? Mine is '93 R100GS PD. Mad cam.

 

[solidstate100]

What year and model is the bike? Mine is '93 R100GS PD. Mad cam.

83 80 G/S, stock cam (as far as I know). Thinking back, when I fitted the Seibenrock 1000cc kit, the top end did quite down a bit (new pistons/pins), the new rocker train also helped a bit, but the biggest overall difference was fitting the little rubber bungs in between the head fins - changed the timbre of the clatter quite a bit, for the better. Also today, as a experiment, I re-fitted the OEM rocker covers (square type as opposed the the earlier rounded ones , which were pattern parts, which I had been running) and again, another small improvement. In my head I keep thinking its as noisy as it was when I got it, but actually, thinking about it properly it is actually a fair bit better. Most of the stubborn residual noise now is around the RH exhaust valve........

 

[(RIP) Bin Ridin]

Hi, might buy some rubber bungs for next time, there are some in place but maybe not full set. Anyhow, I am happy that I fixed a couple of mech issues and made it respectable to ride as opposed to "attention-seeking"...
Next job is new throttle cables and carb to head rubbers....maybe new diaphragms while I am in the vicinity..

 

[Kenny]

Can be expensive critters, can't they _ but you are getting there !

 

[(RIP) Bin Ridin]

This is a video I made of the noise...grrr...

https://www.youtube.com/watch?v=jXOB-x1kMrc

Anyone like to suggest what the cause of the racket might be?

Thanks!

 

[B Murr]

So did you check out the cam to see if it is moving laterally? I still think that would explain it and you would still get good compression if it were the case. Plus I'd guess the followers are getting hammered if the cam is shifting and explains the wear there. Just my two cents of amateur reasoning.

 

[MickDB1]

I know yer may have done this but when yer check your clearances on the valves, check the up/down of the rockers themselves, There should be just enough to let um move when hot. I purchased some spacer washers to reduce the float and then when checking the clearance push the rocker out as it alters the gap slightly. It/mine did sound like yours a bit when very hot, after a good thrashing. Earplugs help tooooooo
HTHY

 

[(RIP) Bin Ridin]

Hi,

Checked the cam play when I replaced the cam followers, no movement there.

Also have shimmed the rockers to just slightly stiff to rotate, i.e. about zero clearance just enough for oil to emerge.

I am thinking valve seating lip is wider than new and clattering.
Any other ideas?

 

[solidstate100]

Listening to that, (and bearing in mind what you have replaced etc) my 2p would suggest general wear on the valve seats and guides. (thought:- has it been converted to unleaded seats/valves? wouldn't be surprised if not and they have worn badly). Looking at the other high general wear on the engine it seems in conflict with the relatively low KM"s unless the mileage is wrongly recorded or there has ben an oil supply issue at some point.

I would have the heads off, measure/replace the guides/valves etc and work back down the valve train from there if that doesn't improve it. (Another thought - check the pushrods carefully as its not unknown for them to bind on the pushrod tubes, bend or start coming apart - the ball ends can start pulling out of the tube where they are press fitted, and then shuttle back and forth in the tube - especially if you have a hot cam in there).

Yet another thought - its not unknown for hot cams to increase the amount of valve noise generally - the steeper/higher ramps can push the valve train beyond what it was originally designed to do in the '20s what with valves shutting quicker, rocker angles being greater etc etc)

 

[(RIP) Bin Ridin]

Thanks for the suggestions. I will be home in December, will think of what next by then.

Any suggestions for best place to get heads overhauled, new seats, guides, valves?