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Mark VIII Fan Installation

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Old Aug 6, 2007 | 05:54 PM
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Default Mark VIII Fan Installation

I'm in the process of installing a Mark VIII fan in my '77. I know that others have installed this fan but the one I have is too thick. It sits on top of my sway bar. Is it possible to trim the shroud on these so that it will sit down between the radiator and the sway bar? Did anyone else have this problem with their fan?

Thanks,
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Old Aug 6, 2007 | 07:15 PM
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You can use some washers or spacers to move the sway bar down a 1/4" or so. That should give you a little more room to work with.
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Old Aug 6, 2007 | 08:49 PM
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I would recommend using a plate the length of the sway bar bracket vs. washers so as to support in between the frame the rubber grommet that the sway bar sits in.
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Old Aug 6, 2007 | 08:51 PM
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Originally Posted by b71vette
I would recommend using a plate the length of the sway bar bracket vs. washers so as to support in between the frame the rubber grommet that the sway bar sits in.

Yeah that would fall under spacer. Either way would work...one just a little better than the other.
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Old Aug 6, 2007 | 09:11 PM
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Yea, ya wanna do that with a spacer plate, putting washers under the ends would have the same effect as loosening the bolts.
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Old Aug 7, 2007 | 04:01 AM
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Could you post pics please as you go? Ive got a Mark VIII fan also that I would like to install soon. Which controller are you going to use?
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Old Aug 7, 2007 | 07:24 AM
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Originally Posted by 78anniversary
Could you post pics please as you go? Ive got a Mark VIII fan also that I would like to install soon. Which controller are you going to use?
I'm using the FK35 Kit from http://www.dccontrol.com/
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Old Aug 7, 2007 | 11:26 AM
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Default My Mark VIII fits snugly forward of the sway bar...

I have it attached to a Summit radiator....but it fits forward of the sway bar. I was going to grind off some of the fan plastic, but it fits so closely that I'm just going to let "wear" take care of interference...which is very minimal.

the link below has some pics where you can see the sway bar vs. fan location:

http://forums.corvetteforum.com/show....php?t=1747579
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Old Aug 7, 2007 | 09:38 PM
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I got the fan mounted to the radiator today. I ended up cutting the shroud down a 1/4" all the way around, although I might not have had to. Seems that I have plenty of room between the shroud and the sway bar now (about a 1/2"). I pop riveted a piece of 1/2"x3/4" aluminum angle to the bottom of the fan. This fit into the stock shroud channel at the bottom of the radiator tray. I pop riveted a piece of 1"x1" aluminum angle to the top. This fit over the top rail of the radiator very nicely. I also cut 2 pieces of 1"x1" angle and pop riveted it to the end of the top piece. These were used as added mounting, which used the stock upper shroud mounts.

Here are some pictures of the fan mounted.









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Old Aug 7, 2007 | 10:00 PM
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That looks fantastic. GOOD job.
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Old Aug 7, 2007 | 10:16 PM
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Originally Posted by Durango_boy
Yeah that would fall under spacer. Either way would work...one just a little better than the other.
Wrong. It works by pulling tight to the frame. Washers would be catastrophic.
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Old Aug 7, 2007 | 10:21 PM
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Originally Posted by BillPk
Wrong. It works by pulling tight to the frame. Washers would be catastrophic.

Explain that one to my neighbor. He has a '75 with a sway bar lowered with a total of four washers. He's had it installed like that for the better part of a decade.

Does catastrophic mean it might case problems in ten years or so?

I'm not saying it's the best way but the whole point of the statement was that the sway bar can be lowered by spacing it away from the frame and most people that have done so that I know of have used washers.

If I were going to do it I would make plates to space it. You probably would too. But how do you tell people that have had no problems with washers that it's catastrophic when nothing bad has happened?

I don't recall hearing of anyone's sway bar breaking away and causing a horrible catastrophe.
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Old Aug 7, 2007 | 10:37 PM
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Originally Posted by Durango_boy
Explain that one to my neighbor. He has a '75 with a sway bar lowered with a total of four washers. He's had it installed like that for the better part of a decade.

Does catastrophic mean it might case problems in ten years or so?

I'm not saying it's the best way but the whole point of the statement was that the sway bar can be lowered by spacing it away from the frame and most people that have done so that I know of have used washers.

If I were going to do it I would make plates to space it. You probably would too. But how do you tell people that have had no problems with washers that it's catastrophic when nothing bad has happened?

I don't recall hearing of anyone's sway bar breaking away and causing a horrible catastrophe.
Washers would work fine if you want to make your sway bar ineffective.

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Old Aug 7, 2007 | 10:42 PM
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Originally Posted by Durango_boy
Explain that one to my neighbor. He has a '75 with a sway bar lowered with a total of four washers. He's had it installed like that for the better part of a decade.

Does catastrophic mean it might case problems in ten years or so?

I'm not saying it's the best way but the whole point of the statement was that the sway bar can be lowered by spacing it away from the frame and most people that have done so that I know of have used washers.

If I were going to do it I would make plates to space it. You probably would too. But how do you tell people that have had no problems with washers that it's catastrophic when nothing bad has happened?

I don't recall hearing of anyone's sway bar breaking away and causing a horrible catastrophe.
Perhaps catastrophic is a poor choice of words. It's plan old incorrect. The frame is used as a componet of the whole. Kid Vette is more correct. It renders it useless.
Using washers is still wrong/incorrect/bad advice.
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Old Aug 7, 2007 | 11:29 PM
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Default You gotta now supply the juice!

Getting back to your fan install, did you consider upgrading the alternator to ensure that big fan doesn't kill your battery?
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Old Aug 8, 2007 | 06:48 AM
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Originally Posted by ThunderMaker
Getting back to your fan install, did you consider upgrading the alternator to ensure that big fan doesn't kill your battery?
I upgraded the alternator to a CS144. That is the CS144 in the pictures.
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Old Aug 8, 2007 | 09:41 PM
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Thaks for posting the pics.
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To Mark VIII Fan Installation

Old Aug 9, 2007 | 10:50 PM
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Originally Posted by captainmorgan
I upgraded the alternator to a CS144. That is the CS144 in the pictures.
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Old Aug 9, 2007 | 10:53 PM
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Originally Posted by BillPk
Perhaps catastrophic is a poor choice of words. It's plan old incorrect. The frame is used as a componet of the whole. Kid Vette is more correct. It renders it useless.
Using washers is still wrong/incorrect/bad advice.

I won't argue, in fact you're very correct. That still doesn't change the fact that people have been lowing their sway bars with washers for decades. Too many people to start pointing fingers.
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Old Aug 10, 2007 | 12:22 PM
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Originally Posted by Durango_boy
I won't argue, in fact you're very correct. That still doesn't change the fact that people have been lowing their sway bars with washers for decades. Too many people to start pointing fingers.
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