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kyleshepherd622 Samba Member
Joined: September 16, 2014 Posts: 10 Location: Vancouver, Wa. USA
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Posted: Mon Sep 29, 2014 7:03 am Post subject: Knocking noise? |
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Hi
My motor is making a very strange knocking noise. It's a 1600 dual port with dual carbouretors. It sounds like a click, or tap, in unison with the exhaust putting. Obviously internal. And only from the left side of the motor, as in driver side if it's installed. The engine was gone through by myself a few months ago, valves adjusted, new rings, polished cylinders. I removed the cylinder heads and they looked fine so I put them back on. No real problems. Now we've been putting 30+ miles on it every day and this noise has come up. What do you think it is? Valve tapping? Rod knock? Worse??
I'll post a video of the noise after it finishes uploading to YouTube. |
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kyleshepherd622 Samba Member
Joined: September 16, 2014 Posts: 10 Location: Vancouver, Wa. USA
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Posted: Mon Sep 29, 2014 7:08 am Post subject: |
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Oh, and the reason I'm not just immediately dropping the engine is this is still my daily driver and I don't want to be screwing around without a car if it's nothing. |
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shortride Samba Member
Joined: October 10, 2010 Posts: 1323 Location: Oklahoma
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Posted: Mon Sep 29, 2014 7:12 am Post subject: |
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It's difficult to diagnose and engine here. It could be a number of things. Could be a rod or main bearing making the noise or even an exhaust leak making the noise. Generally when you only partially rebuild an engine and don't know the history or complete condition of the engine it's will pay off in the long run to go all of the way and rebuild the engine. That way there aren't any surprises later as you have experienced. Daily driver or not you may have to have it rebuilt. _________________ Pearl White 1966 Sedan
Retired US Army - 21 years 11B40, 173rd Airborne Brig. - Vietnam Combat Veteran
Last edited by shortride on Mon Sep 29, 2014 8:17 am; edited 2 times in total |
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kyleshepherd622 Samba Member
Joined: September 16, 2014 Posts: 10 Location: Vancouver, Wa. USA
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Posted: Mon Sep 29, 2014 7:16 am Post subject: |
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How deep are the main bearings? Do I have to split the case?
Thanks
Oh, and here's the noise: http://youtu.be/qdSVcxZACqA |
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shortride Samba Member
Joined: October 10, 2010 Posts: 1323 Location: Oklahoma
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kyleshepherd622 Samba Member
Joined: September 16, 2014 Posts: 10 Location: Vancouver, Wa. USA
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Posted: Mon Sep 29, 2014 7:27 am Post subject: |
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Okay, thanks for your help.
I'll check it out and see what I can do about a rebuild.
How long would a rebuild last? Would that be a permanent fix? Or would this knocking come back in a year? |
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shortride Samba Member
Joined: October 10, 2010 Posts: 1323 Location: Oklahoma
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Posted: Mon Sep 29, 2014 7:34 am Post subject: |
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kyleshepherd622 wrote: |
Okay, thanks for your help.
I'll check it out and see what I can do about a rebuild.
How long would a rebuild last? Would that be a permanent fix? Or would this knocking come back in a year? |
How long it take to rebuild would depend on how experienced the rebuilder is and the availability of parts. A professionally rebuilt engine will last a long time and many miles if done correctly and serviced as it should be. It's only a matter of having the money and resources to have a well built and dependable engine. It would pay to have someone that has experience building a VW engine.
Some of the VW engine building guys here may contribute to this thread. _________________ Pearl White 1966 Sedan
Retired US Army - 21 years 11B40, 173rd Airborne Brig. - Vietnam Combat Veteran
Last edited by shortride on Mon Sep 29, 2014 8:05 am; edited 1 time in total |
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candyman Samba Trout Slayer
Joined: December 20, 2003 Posts: 2694 Location: Missoula MT
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Posted: Mon Sep 29, 2014 8:02 am Post subject: |
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Have you checked for an exhaust leak? They are pretty easy to find and can give tapping knocking popping like sounds, depending on how bad it is. I recently had a leak on one of my riser tubes, sounded just like loose valves. It surfaced about 30 miles after recent overhaul and install |
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grandpa pete Samba Member
Joined: July 06, 2008 Posts: 6426 Location: St. Petersburg, FL
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Posted: Mon Sep 29, 2014 8:06 am Post subject: |
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Stop driving the car.....take the valve covers off and make shure your knock isn't a dropped valve BEFORE it knocks a hole in the piston....I had a little knock that I listened to..... until the piston blew out
_________________ 63 two fold rag
66 sedan delivery Type 6
http://www.thesamba.com/vw/forum/viewtopic.php?t=569619&highlight=sedan+delivery
Last edited by grandpa pete on Tue Sep 30, 2014 9:26 am; edited 1 time in total |
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iowegian Samba Curmudgeon
Joined: February 16, 2005 Posts: 9826 Location: Somewhere between Dubuque and Keokuk
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Posted: Mon Sep 29, 2014 8:11 am Post subject: |
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candyman wrote: |
Have you checked for an exhaust leak? They are pretty easy to find and can give tapping knocking popping like sounds, depending on how bad it is. I recently had a leak on one of my riser tubes, sounded just like loose valves. It surfaced about 30 miles after recent overhaul and install |
I'm hearing an exhaust leak. |
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johnnypan Samba Member
Joined: October 24, 2007 Posts: 7431 Location: sackamenna
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Posted: Mon Sep 29, 2014 8:24 am Post subject: |
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Main bearings don't tap or knock, rod bearings and wristpins do..so does your valve train..or as Iowegian says he hears an exhaust leak..I hear a crock of shit,but he hears an exhaust leak.. |
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kyleshepherd622 Samba Member
Joined: September 16, 2014 Posts: 10 Location: Vancouver, Wa. USA
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Posted: Mon Sep 29, 2014 8:33 am Post subject: |
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It had an exhaust leak, and I bought new seal clamp pieces and it stopped. I'm about halfway sure it isn't exhaust leak.
So it wouldn't be bearings is what I'm hearing?
I'll check it out when I get home.
Pull the heads and cylinders and check the piston rods, and check the valves. If they're fine, I'll take it to a professional. If they're busted I'll fix em! |
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iowegian Samba Curmudgeon
Joined: February 16, 2005 Posts: 9826 Location: Somewhere between Dubuque and Keokuk
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Posted: Mon Sep 29, 2014 8:34 am Post subject: |
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johnnypan wrote: |
Main bearings don't tap or knock, rod bearings and wristpins do..so does your valve train..or as Iowegian says he hears an exhaust leak..I hear a crock of shit,but he hears an exhaust leak.. |
I bow to JohnnyPan's superior intellect. |
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60ragtop Bonneville Belt Bitch
Joined: March 13, 2006 Posts: 7800 Location: Big Wonderful WYO 82401
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Posted: Mon Sep 29, 2014 8:35 am Post subject: |
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you sure it's not the dog's tail beating on something _________________ Rick
Certified Mechanic by the State of Michigan in 1977
ASA certified in 1987
Certified Hunter Wheel Alignment Master Technician 1986
tasb wrote: |
I've restored a large number too, but I don't toot my horn quite as loud.
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sb001 wrote: |
maybe he just snapped cause his car sucked |
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johnnypan Samba Member
Joined: October 24, 2007 Posts: 7431 Location: sackamenna
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Posted: Mon Sep 29, 2014 9:00 am Post subject: |
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iowegian wrote: |
johnnypan wrote: |
Main bearings don't tap or knock, rod bearings and wristpins do..so does your valve train..or as Iowegian says he hears an exhaust leak..I hear a crock of shit,but he hears an exhaust leak.. |
I bow to JohnnyPan's superior intellect. |
didn't think you could fold something that short in half.. |
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mukluk Samba Member
Joined: October 18, 2012 Posts: 6985 Location: Clyde, TX
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Posted: Mon Sep 29, 2014 6:50 pm Post subject: |
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Sounds like noisy valves and a bit of an exhaust leak from what I can hear in the video. _________________ 1960 Ragtop w/Semaphores "Inga" |
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drscope Samba Member
Joined: February 19, 2007 Posts: 15273 Location: Baltimore, Maryland USA
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Posted: Tue Sep 30, 2014 9:24 am Post subject: |
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I didn't listen to your video, but I suggest you start with the simple stuff. When the engine is COLD, pop the valve covers off and check your valve adjustment.
It's pretty easy for that stuff to get loose since it's entire life is just hammering. It may something as simple as one loose valve.
While you're in there check to make sure the nuts holding the rocker assembly are tight.
Since you just went through things I would suspect something came loose.
Start there. Then if that isn't the problem, look a little deeper. _________________ Mother Nature is a Mean Evil Bitch! |
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kyleshepherd622 Samba Member
Joined: September 16, 2014 Posts: 10 Location: Vancouver, Wa. USA
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Posted: Tue Sep 30, 2014 9:27 am Post subject: |
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Alright, thanks guys. Your input is appreciated |
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Spezialist Banned
Joined: July 01, 2005 Posts: 1941
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Posted: Tue Sep 30, 2014 5:06 pm Post subject: |
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I listened to your bug and it sounds pretty deep for a valve tappet, but regular like the cam gear loose. _________________
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Brian Anthony Samba Member
Joined: October 02, 2006 Posts: 215 Location: Longview TX
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Posted: Tue Sep 30, 2014 5:37 pm Post subject: |
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Sounds like an exhaust leak to me. _________________ 1965 Double Cab
1967 Bug, Sedan
1967 Bug, Convertible
I’m not old, but I once knew a man who was alive during the Civil War, and he once knew Revolutionary War veterans. |
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