| Author |
Message |
MaggieMay
Samba Member
Joined: December 27, 2015
Posts: 48
Location: La jolla CA
|
 Posted: Sun Nov 29, 2020 5:12 pm Post subject: Is this doghouse fan correct? Gene berg fan does not fill shroud |
 |
|
I recently installed this gene Berg fan in a doghouse shroud.
Clearance between the front backing plate and the fan is 2mm.
Fan measures 34.5 mm between the plates, and 37mm total.
As you can see the clearance in the rear between the fan and the shroud is 6 mm. From what I have been led to understand this tolerance should be much tighter. Is this the wrong fan?
|
|
| Back to top |
|
 |
Howard 111
Samba Member
Joined: July 09, 2005
Posts: 1827
Location: Virginia
|
| Posted: Sun Nov 29, 2020 5:31 pm Post subject: Re: Is this doghouse fan correct? Gene berg fan does not fill shroud |
|
|
What was the GB # on the fan, and where did the shroud come from?
_________________
1973 Karmann Ghia
Turbocharged, Fuel Injected
http://www.thesamba.com/vw/forum/viewtopic.php?t=531270 |
|
| Back to top |
|
|
grvwsic
Samba Member
Joined: June 14, 2004
Posts: 113
Location: Coastal Cal
|
| Posted: Sun Nov 29, 2020 7:36 pm Post subject: Re: Is this doghouse fan correct? Gene berg fan does not fill shroud |
|
|
The fan looks correct- it measures the same as the one in my spare box.
Are the spacer(s) install? |
|
| Back to top |
|
|
evanfrucht
Samba Member
Joined: July 24, 2016
Posts: 2186
Location: Laurel Canyon, CA
|
| Posted: Sun Nov 29, 2020 7:43 pm Post subject: Re: Is this doghouse fan correct? Gene berg fan does not fill shroud |
|
|
Its probably because either the fan or shroud is aftermarket. Install a venturi ring on it, seal in place, and dont worry about it. Having a small gap similar to that is pretty normal.
_________________
1967 Bug ( the daily rod )
1964 Fury Wagon ( the pavement shredder ) |
|
| Back to top |
|
|
croSSeduP
Samba Member
Joined: June 13, 2004
Posts: 1150
Location: Western Washington State
|
| Posted: Sun Nov 29, 2020 8:42 pm Post subject: Re: Is this doghouse fan correct? Gene berg fan does not fill shroud |
|
|
There's a factory spec on the spacing there in the Bentley manual. I believe it is achieved through the use of spacers. I agree, though, that if it is a OEM fan with an aftermarket fan shroud,...all kinds of fitment problems occur.
_________________
Please check my '67 sedan project progress!
http://www.thesamba.com/vw/forum/viewtopic.php?t=502253&highlight= |
|
| Back to top |
|
|
spencerfvee
Samba Member
Joined: August 19, 2004
Posts: 3068
|
| Posted: Mon Nov 30, 2020 5:35 am Post subject: Re: Is this doghouse fan correct? Gene berg fan does not fill shroud |
|
|
| hi i run into this all the time . you can thank china for all ways making vw parts that dont fit. right you just have to deal with it .like the guy said put a power ring on the fan housing . good luck spencerfvee |
|
| Back to top |
|
|
74 Thing
Samba Member
Joined: September 02, 2004
Posts: 7628
|
| Posted: Mon Nov 30, 2020 10:38 am Post subject: Re: Is this doghouse fan correct? Gene berg fan does not fill shroud |
|
|
| You are supposed to use shims (the same shims used for your alternator pulley halves) to shim the fan forward to take up the gap. It is in the Bentley manual. |
|
| Back to top |
|
|
mark tucker
Samba Member
Joined: April 08, 2009
Posts: 23950
Location: SHALIMAR ,FLORIDA
|
| Posted: Mon Nov 30, 2020 10:47 am Post subject: Re: Is this doghouse fan correct? Gene berg fan does not fill shroud |
|
|
| shim it or make a new spacer or a better plate to attach the alt too.... |
|
| Back to top |
|
|
kreemoweet
Samba Member
Joined: March 13, 2008
Posts: 4086
Location: Seattle, WA
|
| Posted: Mon Nov 30, 2020 10:48 am Post subject: Re: Is this doghouse fan correct? Gene berg fan does not fill shroud |
|
|
| 74 Thing wrote: |
| You are supposed to use shims (the same shims used for your alternator pulley halves) to shim the fan forward to take up the gap. It is in the Bentley manual. |
Wrong. What's in the Bentley manual is how to shim the fan so the gap between it and the REAR cover plate is correct, which
the OP has said he did and is correct. There is no spec for the gap between the fan and FRONT opening in the fan shroud.
_________________
'67 bug: seized by the authorities
'68 bug: seized by the authorities
'71 kombi: not yet seized by the authorities
Stop dead photo links! Post your photos to The Samba Gallery! |
|
| Back to top |
|
|
spencerfvee
Samba Member
Joined: August 19, 2004
Posts: 3068
|
| Posted: Mon Nov 30, 2020 1:47 pm Post subject: Re: Is this doghouse fan correct? Gene berg fan does not fill shroud |
|
|
| mark tucker wrote: |
| shim it or make a new spacer or a better plate to attach the alt too.... |
..................................................................................................mark did you see how big that gap is . i wonder if he is using the right .year hard ware kit .to me it would take a lot of shims .and it would not be enough to close the gap what do you think mark?. |
|
| Back to top |
|
|
MaggieMay
Samba Member
Joined: December 27, 2015
Posts: 48
Location: La jolla CA
|
| Posted: Mon Nov 30, 2020 2:01 pm Post subject: Re: Is this doghouse fan correct? Gene berg fan does not fill shroud |
|
|
| As stated, and reasserted later, the spec is for the fan to the alternator backing plate. The fan shroud is an original VW part. No amount of shimming will rectify this, only the fan being too short, which according to gene berg is a vw german fan. |
|
| Back to top |
|
|
Ohio Tom
Samba Member
Joined: February 09, 2006
Posts: 1662
Location: Marshallville Ohio
|
| Posted: Mon Nov 30, 2020 2:15 pm Post subject: Re: Is this doghouse fan correct? Gene berg fan does not fill shroud |
|
|
| Normal. |
|
| Back to top |
|
|
croSSeduP
Samba Member
Joined: June 13, 2004
Posts: 1150
Location: Western Washington State
|
| Posted: Mon Nov 30, 2020 2:24 pm Post subject: Re: Is this doghouse fan correct? Gene berg fan does not fill shroud |
|
|
| MaggieMay wrote: |
| As stated, and reasserted later, the spec is for the fan to the alternator backing plate. The fan shroud is an original VW part. No amount of shimming will rectify this, only the fan being too short, which according to gene berg is a vw german fan. |
Ah, yes. I had it backwards. Derp. Man. Sorry; I need to read more carefully in the future.
Here's a stupid question: Are you sure that's a fan for a doghouse? As you're probably aware, the earlier fans were narrower.
_________________
Please check my '67 sedan project progress!
http://www.thesamba.com/vw/forum/viewtopic.php?t=502253&highlight= |
|
| Back to top |
|
|
74 Thing
Samba Member
Joined: September 02, 2004
Posts: 7628
|
| Posted: Mon Nov 30, 2020 3:15 pm Post subject: Re: Is this doghouse fan correct? Gene berg fan does not fill shroud |
|
|
| kreemoweet wrote: |
| 74 Thing wrote: |
| You are supposed to use shims (the same shims used for your alternator pulley halves) to shim the fan forward to take up the gap. It is in the Bentley manual. |
Wrong. What's in the Bentley manual is how to shim the fan so the gap between it and the REAR cover plate is correct, which
the OP has said he did and is correct. There is no spec for the gap between the fan and FRONT opening in the fan shroud. |
My mistake. You are correct. The Bentley indicates shims so that there is spacing between the backing plate and the fan.
Typically if I am using all OEM parts it only takes 2-3 shims and the fan will rub on the shroud so I remove one and all is good.
For the OP you are measuring 6mm. Are you using all OEM parts? I have seem some really poor aftermarket fan mounting hubs. |
|
| Back to top |
|
|
busdaddy
Samba Member
Joined: February 12, 2004
Posts: 52679
Location: Surrey B.C. Canada, but thinking of Ukraine
|
| Posted: Mon Nov 30, 2020 3:56 pm Post subject: Re: Is this doghouse fan correct? Gene berg fan does not fill shroud |
|
|
I wonder if there's a bus 38 amp fan hub in play?, I've never tried one with bug tin (probably just lock up the fan against the backing plate), but they do put the fan closer to the generator. Bus one on right below:
_________________
Rust NEVER sleeps and stock never goes out of style.
Please don't PM technical questions, ask your problem in public so everyone can play along. If you think it's too stupid post it here
Stop dead photo links! Post your photos to The Samba Gallery!
Слава Україні! |
|
| Back to top |
|
|
BFB
Samba Member
Joined: November 03, 2014
Posts: 2580
|
| Posted: Mon Nov 30, 2020 4:24 pm Post subject: Re: Is this doghouse fan correct? Gene berg fan does not fill shroud |
|
|
i just took an engine apart and someone had installed the alt / gen mounting plate on backwards, so the side with the raised edge was towards the shroud. i didnt look but youd think that would have to have offset the fan inwards like OP's.
OP, you sure thats not the case with yours?
_________________
"how am i supposed to torque the rear wheel nut to 250 ft lbs??? " - clonebug
An interesting thing happens in forums where everyone starts parroting the same thing and "common knowledge" takes over.
Most experts aren't. |
|
| Back to top |
|
|
MaggieMay
Samba Member
Joined: December 27, 2015
Posts: 48
Location: La jolla CA
|
| Posted: Thu Dec 03, 2020 8:32 am Post subject: Re: Is this doghouse fan correct? Gene berg fan does not fill shroud |
|
|
The backing plate is in correctly the hub is an OEM Volkswagen. All parts are German original. The fan is a gene berg fan advertised as a dog house I have included pictures and measurements of it.
I have ordered a venturi ring |
|
| Back to top |
|
|
evanfrucht
Samba Member
Joined: July 24, 2016
Posts: 2186
Location: Laurel Canyon, CA
|
| Posted: Thu Dec 03, 2020 11:13 am Post subject: Re: Is this doghouse fan correct? Gene berg fan does not fill shroud |
|
|
There are two types of fan hubs. One uses a thick washer and the other doesn't (it has the "thick washer" cast into the hub) They can get mixed up. So if you have the earlier style hub, and someone lost the washer at some point, its possible that might affect it
_________________
1967 Bug ( the daily rod )
1964 Fury Wagon ( the pavement shredder ) |
|
| Back to top |
|
|
Teeroy 
Samba Member
Joined: April 20, 2003
Posts: 3835
Location: Eastern WA
|
| Posted: Thu Dec 03, 2020 7:20 pm Post subject: Re: Is this doghouse fan correct? Gene berg fan does not fill shroud |
|
|
Cant be a hub problem, op said fan was spaced per spec from the backing plate
_________________
Pres. Rivercity VW Club www.rcvwclub.org
Founder Derr Wheat Panzers (DWP)
ARR #3
www.autosportsnorthwest.org |
|
| Back to top |
|
|
Glenn
Mr. 010
Joined: December 25, 2001
Posts: 79395
Location: Sneaking up behind you
|
| Posted: Thu Dec 03, 2020 7:25 pm Post subject: Re: Is this doghouse fan correct? Gene berg fan does not fill shroud |
|
|
_________________
Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
#BlueSquare
עַם יִשְׂרָאֵל חַי |
|
| Back to top |
|
|
|
