 Sudden loud engine noise!!!, Help me diagnose.. but be gentle! |
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| bondo |
 Dec 3 2005, 07:27 PM
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Practicing my perpendicular parking  Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California  |
Ok, I've got a 914, with an unknown engine (serial is for RoW 1.7) that was rebuilt "several years ago". Just now I was shuffling cars... started it up, backed it down the driveway. I let it warm up for a couple minutes and shut it off. Then I went to move the MG so I would have toom to park the 914 next to it. The 914 was off for maybe 5 minutes. When I went to start up the 914, it immediately had a loud clack/knock. I drove it up the driveway and parked it next to the MG, and it made the noise the whole way. (about 75 feet) I shut it off, went to get the camera to record some videos. Then I started it up, and recorded these videos:
First is idling at about 1400 RPM, for 30 seconds. Second is idling with a few blips of the throttle, also for 30 seconds. The videos are 2.7 megs each. Thanks! |
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Posts in this topic
bondo Sudden loud engine noise!!! Dec 3 2005, 07:27 PM
r_towle sounds valve related...
take off the valve covers... Dec 3 2005, 07:31 PM billswim Wow what a great tool that video camera turned out... Dec 3 2005, 07:32 PM J P Stein A big day for noises. Sounds valve related....use ... Dec 3 2005, 07:33 PM Bleyseng Sounds like a valve adjuster is in need of adjust... Dec 3 2005, 07:34 PM bondo Valves.. good..
It doesn't seem to me that i... Dec 3 2005, 07:55 PM Bleyseng The rocker can jump off the valve end and make tha... Dec 3 2005, 07:58 PM ChicagoChris It is a dropped valve seat.
I learned the hard... Dec 3 2005, 07:58 PM jkeyzer Pretty tinny/clacky sounding noise, my first guess... Dec 3 2005, 08:43 PM Eric Taylor Have you checked the exhaust? Mine has done that o... Dec 3 2005, 09:55 PM McMark Sounds remarkably like the valve head that broke o... Dec 3 2005, 10:18 PM Eric Taylor What if the noise stops after a while?
Eric Dec 3 2005, 11:01 PM SGB http://www.914world.com/bbs2/html/e... Dec 3 2005, 11:28 PM bondo Dec 4 2005, 12:30 AM scruz914 If it is a problem with a valve/valve seat a compr... Dec 4 2005, 12:45 AM Series9 Sounds like a rod bearing to me.
Regardless, I... Dec 4 2005, 12:49 AM bondo Dec 4 2005, 01:30 AM pfierb On my 73 2.0 had a similar noise....turned out to ... Dec 4 2005, 05:20 AM Dead Air Dec 4 2005, 08:25 AM Mark Henry Take the cover off and adjust your valves...if one... Dec 4 2005, 09:23 AM Mueller you might be lucky and one of the nuts came off of... Dec 4 2005, 11:15 AM Bleyseng http://www.914world.com/bbs2/h... Dec 4 2005, 12:24 PM Series9 I have a new opinion. Let's see if my logic h... Dec 4 2005, 12:40 PM Bleyseng definately a rocker/valve adjuster noise.....
rod... Dec 4 2005, 01:10 PM bondo Sean_V8_914 and hmeeder were just here delivering ... Dec 4 2005, 05:34 PM qa1142 my vote....
collapsed Hydrolic lifter - happend ... Dec 4 2005, 06:01 PM bondo Dec 4 2005, 11:47 PM bottomend The sound appears to be in unison with the exhaust... Dec 5 2005, 12:29 AM jhadler My first thought was remebering a quote from Star ... Dec 5 2005, 12:49 PM kwales How dirty is the oil?
If you have hydraulic lifte... Dec 5 2005, 05:41 PM bondo Ok, I pulled a valve cover, and here is what I fou... Jan 7 2006, 05:15 PM bondo I just had an epiphany that basically slapped me i... Jan 7 2006, 05:27 PM Joe Ricard Lifters are easy to pull. I would pull the suspec... Jan 7 2006, 06:53 PM bondo Success! I filled it with synthetic, and let i... Jan 7 2006, 06:58 PM kwales Getting the pushrods correctly seated into the hyd... Jan 7 2006, 07:09 PM bondo I never took it apart or messed with any adjustmen... Jan 7 2006, 07:12 PM kwales Check the valve gaps. Do you know who adjusted th... Jan 7 2006, 07:14 PM bondo Jan 7 2006, 07:42 PM bd1308 well...the late vanagons had L-jet on them and wer... Jan 7 2006, 07:51 PM bondo Jan 8 2006, 12:44 AM Tom Same thing happened to my 2.0 with hydraulic lifte... Jan 8 2006, 09:57 AM bd1308 usually, at least with solid lifters and cams, is ... Jan 8 2006, 10:00 AM CHAFF Tom something is buggin the hell outta me.
Could ... Jan 8 2006, 05:38 PM markb Jan 8 2006, 06:48 PM Tom Chaff,
Yes hydraulic lifters are possible. Some H... Jan 9 2006, 10:41 AM
kwales If the oil is dirty, those VW lifters can bleed do... Jan 9 2006, 01:40 PM  |
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