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neili
Samba Member
Joined: April 12, 2013
Posts: 146
Location: Brighton England
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 Posted: Sun Apr 19, 2015 7:00 am Post subject: Fitted new engine but makes a horrible noise at low revs |
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I have fitted a new engine at it makes a horrible knocking noise at low revs but clears after about 2000 rpm and runs great with no issues after
It also makes a horrible noise when engaging the clutch and to can feel it through the pedal.
I am going to check the valve clearances again. Try running it with the van belt off and adjust the clutch up a bit as there is a bit to much play on the pedal.
The noise is much louder in the engine bay than underneath.
Anyone got any other suggestions. Obviously i am worried the whole thing needs to come out again ... grrrr ...  |
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kirbyland
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Joined: December 17, 2010
Posts: 287
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| Posted: Sun Apr 19, 2015 7:37 am Post subject: |
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| Clutch and flywheel all nice and tight? Sounds like somethings loose- |
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olliehank47
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Joined: May 04, 2011
Posts: 1198
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| Posted: Sun Apr 19, 2015 7:46 am Post subject: |
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| kirbyland wrote: |
| Clutch and flywheel all nice and tight? Sounds like somethings loose- |
This^^
The noise and vibration felt through the clutch pedal indicates something amiss in the engine-to-trans area, IMO. Pull the engine and check all bolts and alignments of pressure plate and clutch disc.
Is this a 6 volt to 12 volt conversion/exchange by chance? |
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neili
Samba Member
Joined: April 12, 2013
Posts: 146
Location: Brighton England
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| Posted: Sun Apr 19, 2015 8:08 am Post subject: |
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I think you are right .. i ran the engine before bolting it all up the the transmission and there was no noise ..
I was sure I did everything up tight and went round and double checked everything .. but hey .. I could have missed something .. |
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flemcadiddlehopper
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Joined: December 05, 2011
Posts: 2332
Location: Kelowna, BC. Canada.
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| Posted: Sun Apr 19, 2015 8:28 am Post subject: |
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Sounds like a loose gland nut to me. I have had experience with one coming loose. If it is loose, make sure all the dowel holes haven't been ovalled.
Gordo.
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Everybody Dies....Some Never Live.
Retrograde Garage. Vintage Aircooled, and others. |
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neili
Samba Member
Joined: April 12, 2013
Posts: 146
Location: Brighton England
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| Posted: Sun Apr 19, 2015 8:30 am Post subject: |
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| Oh bugger!! |
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neili
Samba Member
Joined: April 12, 2013
Posts: 146
Location: Brighton England
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| Posted: Sun Apr 19, 2015 10:27 am Post subject: |
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I also notice a drop of oil coming from between the engine and gearbox ..
Is this another tell tell sign the gland nut has come loose.
Does a loose gland nut make the really loud and horrible noise? |
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Eric&Barb
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Joined: September 19, 2004
Posts: 24764
Location: Olympia Wash Rinse & Repeat
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| Posted: Sun Apr 19, 2015 12:07 pm Post subject: |
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Check that the muffler dampener pipe is not too close to the rear bumper and knocking there.
A few drips of oil just mean you have a running engine...
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In Stereo, Where Available! |
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flemcadiddlehopper
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Joined: December 05, 2011
Posts: 2332
Location: Kelowna, BC. Canada.
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| Posted: Sun Apr 19, 2015 3:12 pm Post subject: |
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| neili wrote: |
I also notice a drop of oil coming from between the engine and gearbox ..
Is this another tell tell sign the gland nut has come loose.
Does a loose gland nut make the really loud and horrible noise? |
You can check the end play of the engine while still in the bus. Push the crank pulley all the way into the engine, then pry it out (a dial indicator is useful for this) the difference between in and out is your end play. If you have too much then that is a good indicator of a gland nut problem.
Also if you put the trans in gear (engine off) and have the handbrake on, then try and rock the engine crank back and forth. If it makes the same noise you were hearing it is another good indicator.
Note : when I say good, it means bad.
It is probably not this problem, it's a fairly rare thing to happen, but good to check for.
Gordo.
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Retrograde Garage. Vintage Aircooled, and others. |
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neili
Samba Member
Joined: April 12, 2013
Posts: 146
Location: Brighton England
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| Posted: Mon Apr 20, 2015 2:48 am Post subject: |
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Thanks or all the suggestions .. I'll let you know what I find when I have time to take another look at the old her ...  |
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ChrisFred
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Joined: June 11, 2014
Posts: 322
Location: Boulder, CO
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| Posted: Mon Apr 20, 2015 8:16 am Post subject: |
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| Torque Wrench it!! |
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flemcadiddlehopper
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Joined: December 05, 2011
Posts: 2332
Location: Kelowna, BC. Canada.
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| Posted: Fri Apr 24, 2015 6:31 am Post subject: |
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How is this problem coming along? Any Luck?
Gordo.
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Retrograde Garage. Vintage Aircooled, and others. |
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67jason
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Joined: August 28, 2005
Posts: 4741
Location: behind my back feet - Pittsburg CA
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| Posted: Fri Apr 24, 2015 6:44 am Post subject: |
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| Eric&Barb wrote: |
Check that the muffler dampener pipe is not too close to the rear bumper and knocking there.
A few drips of oil just mean you have a running engine... |
BS - if it leaks its got a problem. they didnt leak when they were new and if all is in good order they wont leak. owners manual also says nothing along the lines of oil drips being normal. dont give me no crap about vw's "marking thier spot" - thats just a lame saying folk came up with who could not or would not attend to their oil leaks.
OP, it sure sounds like you have a flywheel gland nut and or clutch issue. i suspect your gland nut isn't tight enough. the drips of oil is probably coming from the main seal. pull the motor remove clutch and flywheel to inspect.
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Clara 
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Joined: June 14, 2003
Posts: 12401
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| Posted: Fri Apr 24, 2015 7:24 am Post subject: |
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| 67jason wrote: |
| Eric&Barb wrote: |
Check that the muffler dampener pipe is not too close to the rear bumper and knocking there.
A few drips of oil just mean you have a running engine... |
BS - if it leaks its got a problem. they didnt leak when they were new and if all is in good order they wont leak. owners manual also says nothing along the lines of oil drips being normal. dont give me no crap about vw's "marking thier spot" - thats just a lame saying folk came up with who could not or would not attend to their oil leaks. |
Actually, it is normal for the engines to leak a few drops past the main seal after being shut off.... for the earlier cases.
The later cases, from about when they started dual relief, have a return passage as part of the case so the oil by the seal returns to the bottom of the engine.
A pic would be useful here, but I don't have one handy.
When building a motor with an earlier case, I have drilled an oil return passage, to 'retrofit' this improvement.
My Bug with later case has a drip free engine.
This has nothing to do with the horrible noise in the OP's bus. |
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neili
Samba Member
Joined: April 12, 2013
Posts: 146
Location: Brighton England
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| Posted: Fri Apr 24, 2015 10:35 am Post subject: |
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Engine out today and the flywheel is shafted, the noise was it moving .. luckily the crank is ok ..
Got a new flywheel, seal, dowels, glandnut and washer to go on. I also made a tool to get the leverage to get it real tight.
Probably do it tomorrow, fingers crossed it'll solve the issue!!! |
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Teeroy
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Joined: April 20, 2003
Posts: 3685
Location: Eastern WA
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| Posted: Fri Apr 24, 2015 10:39 am Post subject: fitted new engine but makes a horrible noise at low revs |
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Don't forget to set end play, new flywheel my require different shim stack than the old one.
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neili
Samba Member
Joined: April 12, 2013
Posts: 146
Location: Brighton England
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| Posted: Fri Apr 24, 2015 10:43 am Post subject: |
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| Yeah .. i was going to measure the both the flywheels before fitting to make sure they match so the end float is correct .. |
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Abscate
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Joined: October 05, 2014
Posts: 22670
Location: NYC/Upstate/ROW
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| Posted: Fri Apr 24, 2015 12:53 pm Post subject: |
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You install the flywheel, then measure the endplay, then correct. I would not assume that 'matched' flywheels would have the same endplay.
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Eric&Barb
Samba Member
Joined: September 19, 2004
Posts: 24764
Location: Olympia Wash Rinse & Repeat
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| Posted: Fri Apr 24, 2015 3:56 pm Post subject: |
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| 67jason wrote: |
| Eric&Barb wrote: |
Check that the muffler dampener pipe is not too close to the rear bumper and knocking there.
A few drips of oil just mean you have a running engine... |
BS - if it leaks its got a problem. they didnt leak when they were new and if all is in good order they wont leak. owners manual also says nothing along the lines of oil drips being normal. dont give me no crap about vw's "marking thier spot" - thats just a lame saying folk came up with who could not or would not attend to their oil leaks.
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From the 1963 VW transporter workshop manual:
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Malokin Martin
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Joined: August 19, 2007
Posts: 3100
Location: E-burg
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| Posted: Fri Apr 24, 2015 4:16 pm Post subject: |
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| Is "fitted" a British thing? |
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