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raygreenwood Samba Member
Joined: November 24, 2008 Posts: 21474 Location: Oklahoma City
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Posted: Mon May 14, 2018 6:54 pm Post subject: Re: Type IV Fans |
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Well ok! .....just seeing things!
Ok....back to your second set of pictures where you noted that you found three marks on the pulley (really the fan ring....and not the pulley.....but who cares!).....that small kind of half mark.....is not a factory mark.
The other two marks.....the one on the right which is showing a little red paint under the grime.....is in the rigjt position to be 27° BTDC.
The other mark to the left of that....right on the 4th fin over......is in the right position to be either 7.5° depending on what text you read.
While it may have been used on several vehicles....those two marks and the absence of a stamped factory "0" mark are what the fan on late 412 and middle years 914 used with L-jet injection.
Later still they dumped one of the two marks when they started using the flywheel with the two timing sensor pegs in it.
Several texts list European 914 1.7L and L-jet 1.8L as having only the 1 black mark at 7.5°
But.....the other fan in your picture with a single mark on the fan ring at the 3.5 fin mark ...which is around 15°-ish BTDC....damn. just not sure what thats from. Ray |
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ivwshane Samba Member
Joined: May 19, 2011 Posts: 1920 Location: Sacramento ca
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Posted: Mon May 14, 2018 7:20 pm Post subject: Re: Type IV Fans |
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So a stupid question from a noob; when I take off my fan/hub assembly do I need put it back on in the exact same place? Should I be making the parts to be able to line them up later? _________________ 77 westy 2.0 FI
69 ghia coup 1600dp
70 single cab
Last edited by ivwshane on Mon May 14, 2018 7:28 pm; edited 1 time in total |
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busdaddy Samba Member
Joined: February 12, 2004 Posts: 51057 Location: Surrey B.C. Canada, but thinking of Ukraine
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Posted: Mon May 14, 2018 7:22 pm Post subject: Re: Type IV Fans |
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ivwshane wrote: |
So a stupid question from a noob; when I take off my fan/hub assembly do I need put it back on in the exact same place? Should I be making the parts to be able to line then up later? |
The hub is keyed to the crank, it only goes on one way, you'd have to be a particularly talented idiot to screw it up _________________ 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! |
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ivwshane Samba Member
Joined: May 19, 2011 Posts: 1920 Location: Sacramento ca
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Posted: Mon May 14, 2018 7:29 pm Post subject: Re: Type IV Fans |
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busdaddy wrote: |
ivwshane wrote: |
So a stupid question from a noob; when I take off my fan/hub assembly do I need put it back on in the exact same place? Should I be making the parts to be able to line then up later? |
The hub is keyed to the crank, it only goes on one way, you'd have to be a particularly talented idiot to screw it up |
Lol! I've been called a talented idiot once or twice so...:p _________________ 77 westy 2.0 FI
69 ghia coup 1600dp
70 single cab |
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Target Samba Member
Joined: August 09, 2017 Posts: 60 Location: Los Angeles
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Posted: Mon May 14, 2018 7:41 pm Post subject: Re: Type IV Fans |
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raygreenwood wrote: |
Well ok! .....just seeing things!
Ok....back to your second set of pictures where you noted that you found three marks on the pulley (really the fan ring....and not the pulley.....but who cares!).....that small kind of half mark.....is not a factory mark.
The other two marks.....the one on the right which is showing a little red paint under the grime.....is in the rigjt position to be 27° BTDC.
The other mark to the left of that....right on the 4th fin over......is in the right position to be either 7.5° depending on what text you read.
While it may have been used on several vehicles....those two marks and the absence of a stamped factory "0" mark are what the fan on late 412 and middle years 914 used with L-jet injection.
Later still they dumped one of the two marks when they started using the flywheel with the two timing sensor pegs in it.
Several texts list European 914 1.7L and L-jet 1.8L as having only the 1 black mark at 7.5°
But.....the other fan in your picture with a single mark on the fan ring at the 3.5 fin mark ...which is around 15°-ish BTDC....damn. just not sure what thats from. Ray |
No worries. I appreciate the help. This would be a lot easier if I just missed it!
I'm trying to keep up with the vernacular. I know the differences, I swear.
What do you think the solution is? Guesstimate where a mark is supposed to be and notch it by hand? Or am I destined to find another fan? |
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Tcash Samba Member
Joined: July 20, 2011 Posts: 12844 Location: San Jose, California, USA
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Posted: Mon May 14, 2018 8:14 pm Post subject: Re: Type IV Fans |
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Measure over 42mm and with a dull chisel make a mark.
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raygreenwood Samba Member
Joined: November 24, 2008 Posts: 21474 Location: Oklahoma City
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Posted: Mon May 14, 2018 8:38 pm Post subject: Re: Type IV Fans |
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Target wrote: |
raygreenwood wrote: |
Well ok! .....just seeing things!
Ok....back to your second set of pictures where you noted that you found three marks on the pulley (really the fan ring....and not the pulley.....but who cares!).....that small kind of half mark.....is not a factory mark.
The other two marks.....the one on the right which is showing a little red paint under the grime.....is in the rigjt position to be 27° BTDC.
The other mark to the left of that....right on the 4th fin over......is in the right position to be either 7.5° depending on what text you read.
While it may have been used on several vehicles....those two marks and the absence of a stamped factory "0" mark are what the fan on late 412 and middle years 914 used with L-jet injection.
Later still they dumped one of the two marks when they started using the flywheel with the two timing sensor pegs in it.
Several texts list European 914 1.7L and L-jet 1.8L as having only the 1 black mark at 7.5°
But.....the other fan in your picture with a single mark on the fan ring at the 3.5 fin mark ...which is around 15°-ish BTDC....damn. just not sure what thats from. Ray |
No worries. I appreciate the help. This would be a lot easier if I just missed it!
I'm trying to keep up with the vernacular. I know the differences, I swear.
What do you think the solution is? Guesstimate where a mark is supposed to be and notch it by hand? Or am I destined to find another fan? |
Partly,what Tcash said....but understand this.....on ALL type 4 engines.....when viewed from the top at 12:00 oclock....and yes I realize that most late buses do not have the 12:00 timing hole in their fan shroud....but just bear with me.
When the fan is installed correctly and the #1 piston is EXACTLY at TDC....."0" is exactly aligned with the case parting line at 12:00......and is exactly 4.5 fins to the left..... of the right hand fan support pillar when looking at the fan from the pulley side from the rear of the vehicle.
That also means that the dowel pin locator lug will be at 10:00 oclock on the backside.....and....if you take a sharpy marker and transfer that "0"/TDC mark to the outer pulley ring.....the bus "0" mark on the pulley will be exactly 4.5 fins further to your left than the "0" mark. I will post a picture in the am. Ray |
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Clatter Samba Member
Joined: September 24, 2003 Posts: 7527 Location: Santa Cruz
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Posted: Mon May 14, 2018 10:14 pm Post subject: Re: Type IV Fans |
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busdaddy wrote: |
Clatter wrote: |
The early fans with the cone-shaped center and little rubber nose-cone are technically 'wrong' for your late bus.
I have a correct one I'll trade you straight across.. |
How magnanimous of you |
Hey.. I'm just here.. To help..
Seriously, though, unless our OP has his heads off,
How is he going to accurately set his timing?
Plus,
I'm sure that he is 100% confused by reading all of these posts... _________________ Bus Motor Build
What’s That Noise?!? |
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Clatter Samba Member
Joined: September 24, 2003 Posts: 7527 Location: Santa Cruz
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Posted: Mon May 14, 2018 10:34 pm Post subject: Re: Type IV Fans |
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busdaddy wrote: |
Clatter wrote: |
The early fans with the cone-shaped center and little rubber nose-cone are technically 'wrong' for your late bus.
I have a correct one I'll trade you straight across.. |
How magnanimous of you |
Is this how you treat someone who's trying to help you?
Sometimes, when your ship doesn't come in, you gotta swim out to it!
See how you are?
I recognize your style.
I've seen your kind before!
_________________ Bus Motor Build
What’s That Noise?!? |
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Clatter Samba Member
Joined: September 24, 2003 Posts: 7527 Location: Santa Cruz
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Posted: Mon May 14, 2018 10:38 pm Post subject: Re: Type IV Fans |
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See, Ray and I work as a team...
He gets you completely beguiled, to make your head swim with confusion,
Then I swoop down out of my tree and fly away with the goods! _________________ Bus Motor Build
What’s That Noise?!? |
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Wildthings Samba Member
Joined: March 13, 2005 Posts: 50261
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Posted: Tue May 15, 2018 4:35 am Post subject: Re: Type IV Fans |
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Break out two additional fins from the correct locations so that your original fan is balanced and run with it. The output at higher speeds will hardly be effected and the fan may actually run a bit quieter since the harmonic noises will have been diminished a bit.
Filing a deeper cut into your pulley and then marking it will paint will make timing your engine easier and making a second mark 180° opposite the first will make setting the valves easier. Just a paint mark on the outer rim works well for this. |
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