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General Category >> Rubber Side Down! >> 95 head on an 02
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Message started by ckahleer on 12/23/21 at 20:17:36

Title: 95 head on an 02
Post by ckahleer on 12/23/21 at 20:17:36

Looks like I need a head, head cover and cam shaft.
Will 95 parts fit an 02?

Title: Re: 95 head on an 02
Post by ckahleer on 12/23/21 at 20:19:59

Title: Re: 95 head on an 02
Post by ckahleer on 12/23/21 at 20:20:33

Title: Re: 95 head on an 02
Post by Dave on 12/24/21 at 04:04:05

You certainly need rockers......and a cam most likely.

I am not sure you need an entire head - the bearing might still be usable with a bit of cleanup. You really need to get it apart and cleaned up and check clearances.

All year heads will fit all year bikes.

Title: Re: 95 head on an 02
Post by Gary_in_NJ on 12/24/21 at 04:34:50

I see some copper in the bearing shell, so you’ll need new bearings. But the head itself looks fine.

Title: Re: 95 head on an 02
Post by Dave on 12/24/21 at 06:11:15

040E0A000B02060F515753630 wrote:

I see some copper in the bearing shell, so you’ll need new bearings. But the head itself looks fine.

The head does not have any bearing shells.....the cam rides in the aluminum. I think that "copper color" is a trace of oil laying on the bottom.

Title: Re: 95 head on an 02
Post by DragBikeMike on 12/24/21 at 11:01:29

It would be a good idea to figure out what happened before you swap out the head. The majority of your damage seems to be confined to the steady bearing (on the right side of the drive sprocket).

Title: Re: 95 head on an 02
Post by DragBikeMike on 12/24/21 at 11:03:11

The steady bearing is fed oil through a small hole in the hollow camshaft. This is the hole in question. Check the hole to see if it is obstructed.

Title: Re: 95 head on an 02
Post by DragBikeMike on 12/24/21 at 11:04:47

The hollow camshaft is fed oil via a chamfer cut in the left side cam bearing. Was that chafer full of sealant or obstructed in any way?

Title: Re: 95 head on an 02
Post by DragBikeMike on 12/24/21 at 11:10:50

Given that the cam steady bearing is the very last item in the flow path, the condition you have could simply be the result of attrition. If you had an oil supply problem in the feed to the top end, it stands to reason that the component at the end of the line would get the least amount of oil.

How much oil did you find in your top end, and where was the oil? The narrow reservoir on the right side of the cam (between the end of the cam and the rubber plug) looks dry. Was there any oil in that narrow reservoir?
Was the trough under the cam lobes full of oil?

Title: Re: 95 head on an 02
Post by justin_o_guy2 on 12/24/21 at 11:48:29

Running on the sidestand would do that.

Title: Re: 95 head on an 02
Post by ckahleer on 12/24/21 at 15:04:04

Thanks for all the advice. As for some of your questions.
It did not look as oily in there as I have seen in heads of other motorcycle engines I have worked on. When I cranked the engine with the valve adjustment covers off, I could not see any oil flinging around or pumping in.
The only place that had a trough of oil was under the cam lobes. The high spots of the lobes dipped into that oil when I turn the engine by hand. There are no other pools of oil in the head.
I'm taking a few days off from tinkering, (wife's orders), but will check the cam oil feed hole and left cam bearing when I get back to things next week.
I agree, I do not want to install replacement parts if I have an oil supply problem.
I would like to test oil feed to head. If I crank the engine with the head cover off, at what rate and/or pressure should oil come out of the supply hole?
Merry Christmas to all!

Title: Re: 95 head on an 02
Post by ckahleer on 12/27/21 at 16:09:30

I ended up pulling the head. But before pulling, I checked oil flow to the head cover. Cranking the engine, The oil made it all the way to the to the top of the tube pictured, but with very little pressure. My guess is, no more than 1 psi. This may be normal for a Savage. I have owned other bikes with low pressure oiling systems.
I'm also questioning if the deformed O-ring pictured could be the culprit that screwed up the top end. Can it be replaced with a standard O-ring from a HF pack? I found 2 that seem to fit well.

Title: Re: 95 head on an 02
Post by ckahleer on 12/27/21 at 16:10:34

Stock o-ring

Title: Re: 95 head on an 02
Post by ckahleer on 12/27/21 at 16:11:22

HF o-ring