Author Topic: Camshaft cap?  (Read 1080 times)

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Offline PaulT

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Camshaft cap?
« on: August 13, 2019, 03:16:19 am »
Hello all,

Lurked here for a while and found some great information.

I'm hoping someone can help me out with finding some parts.

I bought this '88 C10 in Mass, changed the oil, cleaned the seeds out of of the air cleaner box, wrapped a couple of oiled socks around the skeleton of the air cleaner, got new tires mounted in NJ, then rode to down home just north of Houston.

Alas, when I went to adjust the valves, I ran into a few problems. And I say problems as someone who used a pair of oiled socks as an air cleaner.

I need the #1 exhaust and #1 intake camshaft caps. I can't seem to find even the part numbers for them.
If anyone knows a good place to find the 2 of the valve cover screws and associated washers, I'd appreciate that as well.

And, of course, if anyone in the Houston area happens to have any of the fancy  (SISF, tipover bars, peg lowering, etc) parts that might be looking for a new home, I'd love to hear from you too.

Thanks!

Offline DC Concours

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Re: Camshaft cap?
« Reply #1 on: August 13, 2019, 03:19:06 am »
Why are you using socks for air filter?

Offline batboy

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Re: Camshaft cap?
« Reply #2 on: August 13, 2019, 11:05:05 am »
Camshaft cap? You might need to explain which part you're talking about.

If you need a new air filter it's part number 11013-1112 and still available for about $43 for OEM or half that price for an aftermarket clone.
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Offline works4me

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Re: Camshaft cap?
« Reply #3 on: August 13, 2019, 11:29:34 am »
AFAIK, camshaft caps are not replaceable.
They’re machined as part of the head.
They cannot be replaced or moved from
they’re original position.
The cap and it’s position on the head
are a matched “pair”.

Offline PaulT

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Re: Camshaft cap?
« Reply #4 on: August 14, 2019, 01:11:03 am »
Why are you using socks for air filter?

I'm not anymore, but to make it back in time I had to leave quickly, simply didn't have time to wait for a "real" air filter...and a small rodent found the airbox to be a perfect home at some point before me. I literally cleaned seeds out of the airbox.


Offline PaulT

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Re: Camshaft cap?
« Reply #5 on: August 14, 2019, 01:19:22 am »
AFAIK, camshaft caps are not replaceable.
They’re machined as part of the head.
They cannot be replaced or moved from
they’re original position.
The cap and it’s position on the head
are a matched “pair”.

So what happens if that cap cracks? As an example, if someone used a large sheet metal screw and lots of permatex instead of the proper valve cover bolt?

Yep, I pulled a sheet metal screw out that was holding a corner of the valve cover down, and there are hairline cracks in the top screw hole where the valve cover screw goes.
Don't ask. Just...don't.
I needed to adjust the valves and I'm going to have to figure something out since I really don't trust putting the oversize sheet metal screw back into the top of the camshaft cap.

Offline PaulT

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Re: Camshaft cap?
« Reply #6 on: August 14, 2019, 01:36:49 am »
Camshaft cap? You might need to explain which part you're talking about.

If you need a new air filter it's part number 11013-1112 and still available for about $43 for OEM or half that price for an aftermarket clone.

Had a new Uni air filter waiting for me when I got home, but thanks for the part number.

Camshaft cap is the one of the 10 silver pieces that hold the camshafts down to the head. If you look just to the right of either sprocket, those are the two end caps I am looking for. The exhaust has a 1 and an arrow pointing forward, intake side has a 6 and an arrow pointing forward.

These may be machined out as part of the head, but since 2 of mine are mangled, a minor mismatch is still better than a cracked cap.



Offline Freddy

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Re: Camshaft cap?
« Reply #7 on: August 14, 2019, 01:52:57 am »
You'll have to buy a used head to get em.  They may well lock the camshafts(s) when tightened for the reason works4me stated.
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Offline MAN OF BLUES

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Re: Camshaft cap?
« Reply #8 on: August 14, 2019, 02:31:35 am »
the cam clamping caps, are inline bored with all in place, thus the cut out recess' on the head at the ends.. to clear the reaming tool during mfg'.  simply find a new head on e-bay, if you are lucky, and it's a newer/low mile bike, you are all set... or, you can mess around doing clamp halves, and measuring with plasti-gage, to insure you have some that are worthy.   FSM for measurements.. as an aside, I have a lot of faith in replacement parts from non "blowed up" engines, as the tooling used during mfg, was pretty robust, and consistent..  so a set from a good mill may work just fine, just make sure to inspect using the plasti-gage strips.. per the book.

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Offline batboy

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Re: Camshaft cap?
« Reply #9 on: August 14, 2019, 10:43:53 am »
That's nutty, I would never thought you'd find one of those broken. I can see how it happened though. You are suppose to tighten those hold down caps using a certain sequence and gradually a little at a time. The only reason to remove those caps are to change cams. I agree with the others, time to get a good head off eBay. Some of the motorcycle salvage places on eBay list pics of the donor vehicle and sometimes give you compression test results. I'd look for a complete assembled cylinder head from a bike with lowish miles and good CR test.
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Offline jelbon

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Re: Camshaft cap?
« Reply #10 on: August 14, 2019, 05:10:35 pm »
I have a head that is trashed, but those caps are fine.
You can have them if you want to try installing them.
Check with plastiguage as noted previously to see if they will work.
Or buy another head.

Offline connie_rider

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Re: Camshaft cap?
« Reply #11 on: August 15, 2019, 04:49:59 pm »
PaulT, just saw this.
I'm in Houston {North side}.
I agree the caps are line bored, but you might get lucky with installing another cap.
I have a set of old/used.. Your welcome to them. 
PM me a phone number and you can come get them.

NOTE: Be quick. I have a trip planned.

Ride safe, Ted
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Offline PaulT

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Re: Camshaft cap?
« Reply #12 on: August 16, 2019, 12:04:48 am »
That's nutty, I would never thought you'd find one of those broken. I can see how it happened though. You are suppose to tighten those hold down caps using a certain sequence and gradually a little at a time. The only reason to remove those caps are to change cams. I agree with the others, time to get a good head off eBay. Some of the motorcycle salvage places on eBay list pics of the donor vehicle and sometimes give you compression test results. I'd look for a complete assembled cylinder head from a bike with lowish miles and good CR test.

Oh it's worse than that, looks like  a bolt snapped and it was drilled out and replaced with...a big pointy tipped machine screw.  :-[

Connie_Rider has offered a set of caps, I can gauge those and see if I can't get close or do a little machining to get a good replacement.
I'm kind of curious to see how close the tolerances are on two "random" caps from two "random" heads.

Offline connie_rider

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Re: Camshaft cap?
« Reply #13 on: August 16, 2019, 12:21:51 am »
I'll see you tomorrow.

Ride safe, Ted
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Offline connie_rider

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Re: Camshaft cap?
« Reply #14 on: August 20, 2019, 01:53:39 pm »
Left an hour late for my looooong drive.

Didn't show up, and didn't call, text, or PM me he wasn't coming. {???}
  { *&%$&%^ }  >:(

Ride safe, Ted
« Last Edit: August 20, 2019, 01:57:27 pm by connie_rider »
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Offline PaulT

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Re: Camshaft cap?
« Reply #15 on: August 26, 2019, 10:24:48 pm »
Left an hour late for my looooong drive.

Didn't show up, and didn't call, text, or PM me he wasn't coming. {???}
  { *&%$&%^ }  >:(

Ride safe, Ted

Sorry, had some heavy duty family issues come up out of town.
I do apologize for leaving you hanging.


Offline connie_rider

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Re: Camshaft cap?
« Reply #16 on: September 20, 2019, 01:09:41 pm »
Sooo, it's been a while since you picked them up.
Did the caps work out for you?

Ride safe, Ted
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Offline PaulT

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Re: Camshaft cap?
« Reply #17 on: October 10, 2019, 01:47:50 am »
I'm happy to report that with a little over 500 miles on with the transplanted caps, everything is running nice and smooth.

The only "machining" was using some "tired" scotch-bright to clean the caps up, that put them a hair over loose on tolerance, but she runs smooth.
It definitely beats not being able to torque the valve cover down on that corner!

Thanks again for the help connie_rider!



Offline Bud

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Re: Camshaft cap?
« Reply #18 on: October 10, 2019, 10:00:28 am »
If you really want to show your appreciation for the love shown by Ted, I'm sure he'd appreciate you becoming a paying member of COG.  He might even let you borrow those sexy red suspenders sometime! ;D  Ted's too modest to admit that those things are chick magnets!!  Ain't that right Ted? :nananana: :nananana: ;)
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Offline connie_rider

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Re: Camshaft cap?
« Reply #19 on: October 13, 2019, 09:17:40 pm »
If you really want to show your appreciation for the love shown by Ted, I'm sure he'd appreciate you becoming a paying member of COG.  He might even let you borrow those sexy red suspenders sometime! ;D  Ted's too modest to admit that those things are chick magnets!!  Ain't that right Ted? :nananana: :nananana: ;)

Your right. I'm far too modest to admit that the suspenders are chick magnets.
   {Besides; Everyone knows that it's "the handlebar mustache",,,  not the sexy red suspenders, that are the chick magnets}..  :great:
          (I wuz happy to clarify that for ya)..   :rotflmao:

Ride safe, Ted
« Last Edit: October 15, 2019, 08:19:41 pm by connie_rider »
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Offline Bud

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Re: Camshaft cap?
« Reply #20 on: October 16, 2019, 11:00:50 am »
Don't make me bring "Sam" into this! :-\ :nananana: :nananana: :D :D
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Offline connie_rider

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Re: Camshaft cap?
« Reply #21 on: October 16, 2019, 12:24:12 pm »
Oh nooo. Not Sam!!  :-[

Err getting back to Camshaft cap.
PaulT, I do agree with Bid about the joining COG thing.
You would enjoy riding with us..


NOTE: We're really good folks, sharing, fun to be around, and we'll talk to anyone. {even Bud}   :nananana:

Ride safe, Ted
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Offline PaulT

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Re: Camshaft cap?
« Reply #22 on: October 18, 2019, 10:02:47 pm »
Once I figure out how to update my email address, I'll probably go for a year membership. ;-)