Replacing cams 78 GS1000

[morrison]

All the caps are matched up. I'm going to measure the hieght of all the lobes and see what kind of wear if any are there. Gonna to look into the valve adjustment procedure now and get it going. Thanks everyone with your input. It is appreciated.

[chuck hahn]

there isnt a bearing..its just the cams running in the aluminum..I am no expert, but i dont think youll have any troubles. Be sure to tighten each cap evenly from side to side..little bits at a time till its time to put the torque wrench in play. Throw a thin smear of engine builders assembly lube on them as well..

[morrison]

Yeah I figured there wasn't a bearing present in any part of the head. Where should I be going to get shim kits for the valves? Or is that something that i will need to get once i know what shims I'll need?

[chuck hahn]

Make a simple chart number 1 thru 4 intake and a column for 1 thru 4 exhaust. Measure the gaps on each one and note what shim thickness is in each one. Then you can determine which ones you can shuffle around to a different bucket to bring things into tolerance.. its kinda a shell game of sorts. Once you got as many as you can right..then you write down what cylinder..either intake or exhaust ..you will need to buy a shim for. Make sense??

[chuck hahn]

Heres my basic tracking sheet..just keep it simple.

[Guest]

If you decide you need different cams let me know.

[morrison]

Make a simple chart number 1 thru 4 intake and a column for 1 thru 4 exhaust. Measure the gaps on each one and note what shim thickness is in each one. Then you can determine which ones you can shuffle around to a different bucket to bring things into tolerance.. its kinda a shell game of sorts. Once you got as many as you can right..then you write down what cylinder..either intake or exhaust ..you will need to buy a shim for. Make sense??

Chuck I don't think you could have made it anymore simple. I appreciate the help. Ill get it together tomo when I bring home my feeler gauges and assembly lube. And will let you know the outcome. Thanks again.

[chuck hahn]

bring along dial calipers as well ( preferably MM readable ) to measure the shims if the numbers are worn off.. and heres a tip Rustybronco passed on. Install shims with the numbers towards the pistons..that way the cams rolling over them dont wear the numbers off.. Then next time you need to do valves youll have numbers left to read.

[morrison]

If you decide you need different cams let me know.

Will do. Thanks.

[morrison]

Failed tonight. Installed the the exhaust cam and then everytime I tried setting the intake cam in the crank would advance a little bit. Untill I notice I had installed the exhaust cam while having a link kind of kinked on the crank. Had a long day at work today so I closed up the garage and will check the valve clearance tomo.

I did take the shims out individually the write down the sizes. Found two with nothing on. Is this a common size shim??

[chuck hahn]

Thats why i said get some calipers that read MMs..or know how to convert SAE to metric......INCHES X 25.4= MM THICKNESS

[morrison]

Thats why i said get some calipers that read MMs..or know how to convert SAE to metric......INCHES X 25.4= MM THICKNESS

Ah sorry I must have missed the part. I have calipers in the tool box just for some reason I never thought of using that to get the size. Like I said it's been a long day. Thanks again for the knock up side the head talk lol.

[chuck hahn]

And now you see the wisdom of Rustybronco telling me to put the numbersw down facing the pistons...the cams will wear the numbers off if they are installed facing up..

[morrison]

Got the cams back in, timing set. Tensioner works flawlessly. Tried to check the valve adjustment, and had a hard time determining what the manual is talking about with the placement of the lobes. To my understanding which ever valve you are checking the lobe should be facing outwards. Sound right? If so then only cyl one intake and exhaust valves I was able to fit my smallest gauge into which is .05mm. So now I need to find another gauge that has .04mm and .03mm,.

[Nessism]

Just follow the factory service manual procedure. The clymer method is not as exacting. Check basscliff's website for a free manual download and his adjustment tutorial.