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twomonkeysayoyo
Samba Member
Joined: November 17, 2009
Posts: 651
Location: Carrollton, GA
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 Posted: Wed Jan 18, 2012 2:22 pm Post subject: What makes a VW screech? |
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Brand new alternator on a brand new serpentine with a brand new belt. Motor just completed and put in, never driven, trying to tune it.
AND THIS:
Link
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Steve Arndt
Samba Member
Joined: August 01, 2005
Posts: 1780
Location: Boise, Idaho
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| Posted: Wed Jan 18, 2012 2:23 pm Post subject: |
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| Is the crank pulley rubbing on the sheet metal pulley tin? |
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sgmalt46
Samba Member
Joined: April 20, 2005
Posts: 1296
Location: south san francisco
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| Posted: Wed Jan 18, 2012 2:27 pm Post subject: |
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| sounds like the fan rubbing on the backing plate maybe. take the belt of and give it a spin and see if it's rubbing? not shimmed right? |
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twomonkeysayoyo
Samba Member
Joined: November 17, 2009
Posts: 651
Location: Carrollton, GA
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| Posted: Wed Jan 18, 2012 2:29 pm Post subject: |
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| Steve Arndt wrote: |
| Is the crank pulley rubbing on the sheet metal pulley tin? |
No tin down there.
It spun freely before installation, no rubbing. I think the fan is clear of the tins. I was pretty worried about that before installation. It did NOT make the noise last night, only after I moved the car.
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twomonkeysayoyo
Samba Member
Joined: November 17, 2009
Posts: 651
Location: Carrollton, GA
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| Posted: Wed Jan 18, 2012 2:35 pm Post subject: |
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confirmed... makes same noise even with belt off.
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Ace
Samba Member
Joined: July 07, 2003
Posts: 1903
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| Posted: Wed Jan 18, 2012 2:47 pm Post subject: |
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| Don't start it anymore. Unless the new lower pulley is rubbing, you have a much bigger problem. Pull the pulley and look for wear on the case. |
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DarthWeber
Samba Member
Joined: November 24, 2007
Posts: 7543
Location: Whittier,CA
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| Posted: Wed Jan 18, 2012 2:49 pm Post subject: |
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It might be my eyes but in the video it appears the carb on the right side is loose, just flopping around!  Might just be the air cleaner.
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| Mitey62 wrote: |
| Swapped the Compufire for a Bosch blue and some points I had sitting around, started 1st crank. Took her out for a drive, pulls harder, more RPM, and runs smoother. I think I'll be sticking with points from now on. |
| RockCrusher wrote: |
JB weld the case halves....that'll keep the fretting to a minimum.  |
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twomonkeysayoyo
Samba Member
Joined: November 17, 2009
Posts: 651
Location: Carrollton, GA
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| Posted: Wed Jan 18, 2012 2:51 pm Post subject: |
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| DarthWeber wrote: |
| It might be my eyes but in the video it appears the carb on the right side is loose, just flopping around! |
The air filter is not attached, only sitting there to keep sweetgum balls out of the carbs. Good eye...
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twomonkeysayoyo
Samba Member
Joined: November 17, 2009
Posts: 651
Location: Carrollton, GA
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| Posted: Wed Jan 18, 2012 2:53 pm Post subject: |
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Could it be a clutch issue? I can't get any feel from it... it's either hard as a rock or super loose. Or, rather, super loose until it is hard as a rock. No tip in or spring back pressure like I remember these things having (it's been 20 years...)
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poorboyrc77
Samba Member
Joined: March 24, 2011
Posts: 99
Location: Talladega , AL.
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| Posted: Wed Jan 18, 2012 2:57 pm Post subject: |
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| Just a guess. Is the starter staying engaged? |
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twomonkeysayoyo
Samba Member
Joined: November 17, 2009
Posts: 651
Location: Carrollton, GA
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| Posted: Wed Jan 18, 2012 3:03 pm Post subject: |
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| poorboyrc77 wrote: |
| Just a guess. Is the starter staying engaged? |
how would I know?
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twomonkeysayoyo
Samba Member
Joined: November 17, 2009
Posts: 651
Location: Carrollton, GA
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| Posted: Wed Jan 18, 2012 3:06 pm Post subject: |
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| Ace wrote: |
| Don't start it anymore. Unless the new lower pulley is rubbing, you have a much bigger problem. Pull the pulley and look for wear on the case. |
How do I get this damn pulley off?
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speedyshift74
Samba Member
Joined: January 12, 2005
Posts: 449
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| Posted: Wed Jan 18, 2012 3:10 pm Post subject: |
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| Notice the screech changes pitch as the engine stalls out? Since you confirmed that the belt and Fan are not the problem, Like others have said, take the main pulley off and see if it has wear marks on in from rubbing on the case. If it is rubbing , you need to FIX the problem. Dont run the engine anymore untill you find the problem. Maybe turn the engine over by hand with a wrench and see if you feel any drag. |
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poorboyrc77
Samba Member
Joined: March 24, 2011
Posts: 99
Location: Talladega , AL.
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| Posted: Wed Jan 18, 2012 3:14 pm Post subject: |
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| Take the big nut off. A puller would be nice. Some people even use two big screw drivers. |
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speedyshift74
Samba Member
Joined: January 12, 2005
Posts: 449
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| Posted: Wed Jan 18, 2012 3:14 pm Post subject: |
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| If it is an aftermarket Aluminum pulley, remove the pulley bolt. If it wont budge, you can use a little heat and it will slide off. If it has been rubbing against the case, you may have alot harder time with removal. |
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twomonkeysayoyo
Samba Member
Joined: November 17, 2009
Posts: 651
Location: Carrollton, GA
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| Posted: Wed Jan 18, 2012 3:15 pm Post subject: |
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turning the crank by hand made the noise happen, as well. This happened while I was attempting to get the pully off. I could not locate the source of the noise while under the car. One minute it seemed as if it was coming from the front of the motor, the next the back.
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poorboyrc77
Samba Member
Joined: March 24, 2011
Posts: 99
Location: Talladega , AL.
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| Posted: Wed Jan 18, 2012 3:18 pm Post subject: |
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| You need to get someone to help listen while you turn it over. By hand real slow. |
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twomonkeysayoyo
Samba Member
Joined: November 17, 2009
Posts: 651
Location: Carrollton, GA
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| Posted: Wed Jan 18, 2012 3:25 pm Post subject: |
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Pulley removed, noise still persists. Now what?
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twomonkeysayoyo
Samba Member
Joined: November 17, 2009
Posts: 651
Location: Carrollton, GA
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| Posted: Wed Jan 18, 2012 3:27 pm Post subject: |
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I guess the plan at this point is to remove the motor and see if it persists outside the confines of the transaxle. Anything I should try before this?
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Dale M.
Samba Member
Joined: April 12, 2006
Posts: 20380
Location: Just a tiny bit west of Yosemite Valley
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| Posted: Wed Jan 18, 2012 3:29 pm Post subject: |
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Some tool or something between pulley and case????
Dale
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All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ... |
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