What's that sound?, Newbie requiring your expertise |
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What's that sound?, Newbie requiring your expertise |
Germancar-Junkie |
Mar 5 2012, 08:04 AM
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#1
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Man pedals aren't just for men Group: Members Posts: 51 Joined: 14-January 12 From: Weekdays, MD - Weekends, WV Member No.: 14,004 Region Association: MidAtlantic Region |
I finally got my most recent purchase up on the "big jackstand" and checked out the structural bits. There is some damage. Like it ran over a median or 10 ton bouder, but I can fix that.
The damage to the underside included tweaking the engine tins (both horizontal and vertical) about an inch up and an inch left on the driver's side. So the engine may have / must have taken a hit too. My biggest concern is the "clacking" sound the engine makes. I started it up just fine. It idled fine for the 20 seconds I was willing to let it run with all that racket going on. Then I shut it off and started running through the possibilities. Needless to say, most of them are not good. Gerbil with a jackhammer was the first one to come to mind. Just kidding. My question is, where should I start to try to find the source of this sound? Thanks, Dawn |
rnellums |
Mar 5 2012, 10:06 AM
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#2
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Professional Enthusiast Group: Members Posts: 1,646 Joined: 26-November 09 From: Littleton, CO Member No.: 11,072 Region Association: Rocky Mountains |
It probably sounds nothing like this, but what about an exhaust leak? The rock would have bent the headers causing a leak, and the valves are so close to the exhaust you would hear the valvetrain quite loudly. It probably wouldn't sound like it was "inside" the engine though.... (IMG:style_emoticons/default/dry.gif)
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Rand |
Mar 5 2012, 11:57 AM
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#3
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Cross Member Group: Members Posts: 7,409 Joined: 8-February 05 From: OR Member No.: 3,573 Region Association: None |
It probably sounds nothing like this, but what about an exhaust leak? The rock would have bent the headers causing a leak, and the valves are so close to the exhaust you would hear the valvetrain quite loudly. It probably wouldn't sound like it was "inside" the engine though.... (IMG:style_emoticons/default/dry.gif) I thought of exhaust leak too. It can be deceiving how it might sound like something clacking. Also, if the connection to the air injection port comes loose you will get a sound like that (if this is a late model car that has it). Probably not the cause in this case, but always good to get all the possibilities out there. |
Germancar-Junkie |
Mar 5 2012, 03:18 PM
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#4
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Man pedals aren't just for men Group: Members Posts: 51 Joined: 14-January 12 From: Weekdays, MD - Weekends, WV Member No.: 14,004 Region Association: MidAtlantic Region |
Okay, so on the way home, I'm stopping by the garage. I have my list of suggestions. Let me spell them out here and correct me if I'm proceeding in a logical manner.
1 - Check for debris in the impeller fan 2 - Check each exhaust connection for gaskets & fit 3 - Check headers for holes 4 - Check for loose cylinder head - Would love some "how to" on this one 5 - Remove valve covers and check for loose valves 6 - Not sure what the air injection port is just yet, but I'll find it 7 - Change the oil and filter (nobody mentioned this, but it's a little low and dark) By the way, what brand and weight oil is recommended? Last but not least... If I do have a loose valve or cylinder head, will it hurt the engine (any more than it already could be) if i let it run for 5 or 10 minutes while I crawl around underneath and listen for the source? I love this shtuff! Dawn (IMG:style_emoticons/default/driving-girl.gif) |
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