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Old 11-14-2012, 01:55 PM   #1
Murphdaddy
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Default Damaged Cam, how bad is it?

So after spinning a bearing I'm having the block replaced in my motor. The mechanic doing the work had trouble getting the cam sprocket off so he used pliers or something on the camshaft to hold it in place. Here is what the damage looks like: (sorry for the crappy cell phone pic)



The mechanic tells me it's no big deal and we can reuse it. What to you guys think?
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Old 11-14-2012, 02:06 PM   #2
Type2
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First off, get a new mechanic. Fast. The idea of putting pliers on a cam to hold it in place makes my skin crawl... I would not let him anywhere near your engine.

Now, to answer you question. It looks like your "mechanic" was smart enough to at least clamp down the pliers on a part of the cam where it does not make any contact with the journal bearings. So, yes, based upon your crappy cell phone pic, it appears your camshaft can be reused. I would make sure that it is deburred so no metal chunks break off.
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Old 11-14-2012, 02:14 PM   #3
tibug
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Dudeeeee......And I thought I did sketchy and unorthodox things when working on my car. For a professional mechanic, that is a horrible thing to do. He is a professional!? Even if he forgot to remove the sprocket until he had the cam out, he could have wrapped a piece of timing belt around the sprocket and pinched the belt in a vice to hold the sprocket and cam from moving. Good luck, I'd demand that he front the cost for a new camshaft and take your business elsewhere.
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Old 11-14-2012, 03:38 PM   #4
drewvdw
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Damn...That's really sketchy. Like said before, it *should* be okay, but there's no way to be sure...
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Old 11-14-2012, 03:56 PM   #5
Tripintaz
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That wont cause any issues at all so don't stress. However, if your mechanic was careless enough to use improper tools I would seriously question his work in other areas. I would question him as to why he did not do it properly.
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Old 11-14-2012, 05:18 PM   #6
HinshawWRX
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I would promptly find a new mechanic. Where he held it isn't going to be a wear surface, so he is TECHNICALLY correct. However it is a stress riser and can cause issues down the road. Plus the fact that he used a set of pliers to hold it down, run. And to answer the question, better be safe then sorry and just replace it.
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Old 11-15-2012, 09:14 AM   #7
Leafy
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Quote:
Originally Posted by HinshawWRX View Post
However it is a stress riser and can cause issues down the road. Plus the fact that he used a set of pliers to hold it down, run. And to answer the question, better be safe then sorry and just replace it.
Are you really worried about a stock cam in a stockish engine running stock valve springs fatigue failing from a stress concentration like that? The notch at the lobs should be a worse stress concentration than that, and so is the keyway for the cam gear.
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Old 11-14-2012, 05:32 PM   #8
HeroCrank
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Omfg I can't believe what I just read/looked at. Get a new mechanic ASAP. No true professional would ever do that.
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Old 11-14-2012, 05:52 PM   #9
JangoFett50
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lol stress riser! that was great. If its not on the lobe or in contact with a bearing your fine. i would look into deburring it so no metal flakes find their way around but really its just scratched.
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Old 11-14-2012, 10:55 PM   #10
WRXSteye20008
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You probably wont get a new mechanic, but I sure as hell would. Good Lord. Be safe and replace it, wont be cheap, but may save your entire engine down the road.
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Old 11-14-2012, 11:17 PM   #11
drewvdw
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It just so happens that I have a set of cams off of my car that I'm looking to sell...What a coincidence.

Between 27-28,000 miles, still running when motor was pulled although it had low compression. PM me an offer if you're interested.
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Old 11-15-2012, 12:13 AM   #12
mod maniac
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It's no big deal, no need for new cams. Debur and run it.
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Old 11-15-2012, 09:00 AM   #13
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You can clean it and run it. I wouldn't. Shop owes you a new one. They just killed any resale value. And a mechanic didn't do that, that's the work of a dip $hit. Find a mechanic to work on your car, don't let this dip $hit touch it again.
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Old 11-15-2012, 09:24 AM   #14
drewvdw
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I think he means it raises personal stress...like blood pressure.
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