SuzukiSavage.com - Cam Shaft Porosity

Reelthing Serious Thumper Alliance Member Offline Fish or ride that is the question Posts: 5397 Houston,Tx Gender:	Re: Cam Shaft Porosity Reply #15 - 04/14/07 at 10:25:59 try some motorcycle spec syn oil in the beast - lord I'm trying to make yet another oil thread - oh yeah use 93 octane - there that should just about screw up any thread.
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Savage_Greg Serious Thumper Alliance Member Offline Don't go around your ass to reach your elbow... Posts: 7844 SW Washington State Gender:	Re: Cam Shaft Porosity Reply #16 - 04/14/07 at 10:29:06 You forgot to mention higher tire pressure and loctite.... I've been HIJACKED!!!! Ahhhh!!!!!!!!!!!!!!!!!!!!
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barry68v10 Serious Thumper Offline Posts: 955 Maryland Gender:	Re: Cam Shaft Porosity Reply #17 - 04/14/07 at 20:42:26 YEAH, and a petc0ck conversion! Greg, the problem with your cam is you haven't converted your petc0ck yet
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28903 L.A. California Gender:	Re: Cam Shaft Porosity Reply #18 - 04/14/07 at 21:22:22 no, no... he need 93 octane
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Savage_Greg Serious Thumper Alliance Member Offline Don't go around your ass to reach your elbow... Posts: 7844 SW Washington State Gender:	Re: Cam Shaft Porosity Reply #19 - 04/14/07 at 21:59:31 Gee...I disappeared for a couple hours to finish my tax returns and all of a sudden it's a feeding frenzy in here.... Or is this just a scene out of Shark Tales?
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jjn

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Re: Cam Shaft Porosity
Reply #20 - 04/15/07 at 11:24:32

I worked on diesel (and gas) freight trucks for many years and have seen many camshafts that looked like that. I've seen them badly pitted, and with large depressions worn on them just before the lobe.The difference is it usually took many hundreds of thousands of mile before they started looking like yours.We would consider them junk and replace them. We wouldn't have regrinds because they never seemed to last as long as an OEM cam would.

Jon

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Jon in Puyallup, Wa. USA

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Trippah Serious Thumper Offline I ride, therefore I am. Posts: 2517 central Mass Gender:	Re: Cam Shaft Porosity Reply #21 - 04/15/07 at 15:13:35 Interesting that you left the thread unattended to do taxes..now its a double shafted thread.
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Dynobob

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Re: Cam Shaft Porosity
Reply #22 - 04/15/07 at 16:02:04

When I look at the pic I think galling too. Cams break in during the first 30 minutes of runtime so maybe Suzuki was a little too sparse on the break in lube. You need to coat a new cam's lobes with special moly break-in lube designed for that purpose.

I'll wait till the last minute to do my taxes ... as usual Grin

They're due on the 17th at midnight.

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Savage_Greg

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Re: Cam Shaft Porosity
Reply #23 - 04/16/07 at 10:37:47

Dynobob wrote on 12/31/69 at 16:00:04:

When I look at the pic I think galling too. Cams break in during the first 30 minutes of runtime so maybe Suzuki was a little too sparse on the break in lube. You need to coat a new cam's lobes with special moly break-in lube designed for that purpose.

I'll wait till the last minute to do my taxes ... as usual Grin

They're due on the 17th at midnight.

I disagree, but oh well, I could be wrong too. Never saw cam lobes like this before. Gonna get Lancer's hard chrome regrind job this time.

As for lube, I used engine assembly grease when I first pulled the headcover, however, unless you wipe all the oil out of the head, there is always a little reservoir of oil under the cam lobes anyway. They get lubed on the first rotation.

Yeah...I bought Turbo Tax on Friday. Finished taxes on Saturday. Just waiting for refunds now Tongue

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bentwheel

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Re: Cam Shaft Porosity
Reply #24 - 04/16/07 at 13:11:42

Savage_Greg wrote on 12/31/69 at 16:00:02:

Oh, you don't know how I'd like to think that way. Unfortunately those pits are on top of the lobe. If you look at my signature line, it is the lobe pointing to the right. So, it is actually under full pressure at that point Sad

I have come up with an idea since I reread your post about damage at full pressure. What about coil binding? I realize this supports the galling theory, and prevails more in recent rebuilds, but maybe your valve springs are out of reserve. When you reassemble your motor (especially with a new cam) you can test for this. I don't know what Suzuki specs are, but NASCAR motor builders go with 0.100". Probably 0.050" is fine for our motors. You haven't changed your valve seats have you? Sometimes new valve seats raises the valve crown up and shortens the spring travel.

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Bentwheel FSO
2006 Suzuki 650 V-Strom
1977 Yamaha XS360
1972 Honda CL175

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Savage_Greg

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Re: Cam Shaft Porosity
Reply #25 - 04/17/07 at 00:03:37

bentwheel wrote on 12/31/69 at 16:00:04:

I have come up with an idea since I reread your post about damage at full pressure. What about coil binding? I realize this supports the galling theory, and prevails more in recent rebuilds, but maybe your valve springs are out of reserve. When you reassemble your motor (especially with a new cam) you can test for this. I don't know what Suzuki specs are, but NASCAR motor builders go with 0.100". Probably 0.050" is fine for our motors. You haven't changed your valve seats have you? Sometimes new valve seats raises the valve crown up and shortens the spring travel.

Well, no. Haven't done any of that. Everything is still stock.

This certainly is an interesting issue though and will get lots of scrutiny at reassembly time.

Thanks for more think...

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LANCER Serious Thumper Alliance Member Offline Savage Beast Performance Parts Posts: 10687 Oklahoma Gender:	Re: Cam Shaft Porosity Reply #26 - 04/17/07 at 03:32:43 Savage_Greg wrote on 12/31/69 at 16:00:04: Yeah...I bought Turbo Tax on Friday. Finished taxes on Saturday. Just waiting for refunds now Taxes ?? What taxes ? Filed what ? What is a refund ? What is this strange language you are speaking?
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Rockin_John

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Re: Cam Shaft Porosity
Reply #27 - 04/17/07 at 09:56:44

LANCER wrote on 12/31/69 at 16:00:04:

Taxes ?? What taxes ? Filed what ? What is a refund ?

What is this strange language you are speaking?

Go back to sleep and do not worry yourself about such things. Taxes are for a poor unfortunate section of socity that performs menial duties refered to as "work." To add insult to their punishment, they are then made to pay tribute money to the government for the privlege of working.

I'm not certain, but I think the whole scheme is a punishment for some past transgression(s) as it turns out that working is a lot like being in he!!.

I know this all too well, as I worked for very evil companies, and paid much tribute for many decades before deciding that I would rather freeze or starve than submit to further torment at the hands of the evil ones.

For now, at very high personal cost, I have escaped thier bonds. And now I run FREE like the wind on my faithful comanion vehicle "Ox" which was forged specifically to allow me to enjoy this thing called freedom!!! 8) 8)

NOTE: The above is not intended to insult anyone. It is parody. This information is for those who may not know what parody is... Here's a hint: It isn't a little green and yellow bird hanging in the pet shop window! Grin

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barry68v10 Serious Thumper Offline Posts: 955 Maryland Gender:	Re: Cam Shaft Porosity Reply #28 - 04/17/07 at 18:37:24 Quote: It isn't a little green and yellow bird hanging in the pet shop window! I thought that was the length of the federal tax extension... ???
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LANCER Serious Thumper Alliance Member Offline Savage Beast Performance Parts Posts: 10687 Oklahoma Gender:	Re: Cam Shaft Porosity Reply #29 - 04/17/07 at 20:04:06 I too was once bound by the chains of THEM. I now fly under the ever-searching radar forging my own trail and breathing the free air of ... .... ..... whatever it was I just forgot.
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