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11-14-2012, 01:55 PM | #1 |
Scooby Newbie
Member#: 217909
Join Date: Jul 2009
Chapter/Region:
MWSOC
Location: Livonia, Mi
Vehicle:2009 Legacy GT OBP |
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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11-14-2012, 02:06 PM | #2 |
Scooby Specialist
Member#: 200436
Join Date: Jan 2009
Chapter/Region:
MWSOC
Location: Lawrence, KS
Vehicle:2004 Forester XT Black |
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. |
11-14-2012, 02:14 PM | #3 |
Scooby Specialist
Member#: 273906
Join Date: Feb 2011
Chapter/Region:
NESIC
Location: U.S. (Рос
Vehicle:2005 Lexus Grandpa |
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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11-14-2012, 03:38 PM | #4 |
Scooby Guru
Member#: 255776
Join Date: Aug 2010
Chapter/Region:
MWSOC
Location: Laramie, WY
Vehicle:2010 LR WRX MPS powered. |
Damn...That's really sketchy. Like said before, it *should* be okay, but there's no way to be sure...
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11-14-2012, 03:56 PM | #5 |
Scooby Specialist
Member#: 245218
Join Date: Apr 2010
Chapter/Region:
South East
Location: FL
Vehicle:2013 STI Limited |
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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11-14-2012, 05:18 PM | #6 |
Medium Frank
Moderator Member#: 140114
Join Date: Feb 2007
Chapter/Region:
MAIC
Location: Common Sense, VA
Vehicle:2020 Subaru Outback |
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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11-14-2012, 05:32 PM | #7 |
Scooby Specialist
Member#: 301089
Join Date: Nov 2011
Chapter/Region:
NESIC
Location: Parts Unknown
Vehicle:2013 Toyota Tundra Rock Warrior |
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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11-14-2012, 05:52 PM | #8 |
Scooby Newbie
Member#: 306557
Join Date: Jan 2012
Chapter/Region:
Tri-State
Location: Philadelphia
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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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11-14-2012, 10:55 PM | #9 |
Scooby Specialist
Member#: 175565
Join Date: Mar 2008
Chapter/Region:
MWSOC
Location: KCMO
Vehicle:2014 Sport Premium Satin White Pearl |
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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11-14-2012, 11:17 PM | #10 |
Scooby Guru
Member#: 255776
Join Date: Aug 2010
Chapter/Region:
MWSOC
Location: Laramie, WY
Vehicle:2010 LR WRX MPS powered. |
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. |
11-15-2012, 12:13 AM | #11 |
Scooby Specialist
Member#: 300551
Join Date: Nov 2011
Chapter/Region:
SCIC
Location: mariposa ca.
Vehicle:2002 FOZ STI 2.34 Fullers Garage |
It's no big deal, no need for new cams. Debur and run it.
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11-15-2012, 09:00 AM | #12 |
Scooby Specialist
Member#: 168101
Join Date: Jan 2008
Chapter/Region:
NWIC
Vehicle:15 BRZ Limited SS |
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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11-15-2012, 09:14 AM | #13 |
Scooby Specialist
Member#: 330625
Join Date: Aug 2012
Chapter/Region:
NESIC
Location: MA
Vehicle:2006 WRX WRB |
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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11-15-2012, 09:24 AM | #14 |
Scooby Guru
Member#: 255776
Join Date: Aug 2010
Chapter/Region:
MWSOC
Location: Laramie, WY
Vehicle:2010 LR WRX MPS powered. |
I think he means it raises personal stress...like blood pressure.
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