Help with MKIV Hood Hinges - FFCars.com : Factory Five Racing Discussion Forum
 
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post #1 of 6 (permalink) Old 10-10-2019, 12:10 AM Thread Starter
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Help with MKIV Hood Hinges

I have seen lots of posts with people trying to solve problems with their hood hinge installation but I haven't found a solution to the current problem I am having (which is driving me nuts and keeping me from getting out on the road to enjoy the car a bit while still in gel coat and before the weather turns here in NC).

My basic problem is the hood hinges, when closed, interfere with or "hit" the 3/4" frame to which the upper radiator is attached. This interference prevents the front of the hood from closing (see pics attached).

I have checked the instruction manual pictures and schematics as well as compared my set up to other build pictures but I am stumped.

Can you tell from my pictures if I am missing something obvious that is causing this or if I put the hinge components together incorrectly?

I have read that others have removed some of the hinge material to get clearance but I don't think that is an option for me given the amount of interference with the frame.

Thanks in advance.
Glenn

Attached Images
File Type: jpg Hood.jpg (208.3 KB, 24 views)
File Type: jpg Radiator View.jpg (270.2 KB, 21 views)
File Type: jpg Hinges.jpg (225.2 KB, 23 views)
File Type: jpg Driver Side.jpg (234.0 KB, 19 views)
File Type: jpg Pass Side.jpg (238.3 KB, 21 views)
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post #2 of 6 (permalink) Old 10-10-2019, 02:02 AM
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Best I can tell the pieces are assembled correctly. Two things that I can suggest. Positive the body is in the correct location? Front to back and the hood outline should be 1/2 inch or so above the 3/4 inch chassis tube around the opening. If either is way off could be a problem. The other thing is it appears maybe your hinges are pulled down too low on the chassis mount. This might seem counter-intuitive. But the geometry on those hinges can be a little deceiving. If you loosen the bolts holding the hinges to the chassis mount just enough so that the whole assembly can move up and down, can you close the hood? Same with the front to back adjustment. Loosen and see if you can close the hood. In both cases, seeing if the hinge will find a position where it will close and not hit the radiator cross tube. That BTW is the best way to set those hinges. With the hood closed in the opening and then reach up from underneath and tighten the bolts. Easy to do with no engine. A little harder with an engine installed but still possible. I too have heard of people having to trim the hinge arms. But three Roadster builds I haven't had to.

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post #3 of 6 (permalink) Old 10-10-2019, 04:17 AM
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Can you raise up the front Quick jack mounts on the outrigger arms?
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post #4 of 6 (permalink) Old 10-10-2019, 04:18 AM
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The point being to raise the body up.
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post #5 of 6 (permalink) Old 10-10-2019, 11:03 AM
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As has been said you have to raise the nose. You want to have about 1/2" or more between the underside of the body and the top surface of the frame tubes at the point where they angle down to the bumper mounting plates.

Jeff

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post #6 of 6 (permalink) Old 10-11-2019, 09:22 PM Thread Starter
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Many thanks for the replies. I was confident that the body was well positioned front to back but I definitely don’t have a 1/2 inch clearance from the top of the frame tubes to the underside of the body.

I proved that this is the cause of my hinge interference problem by loosening the front QJs, lifting the front body and inserting a nut that was about 1/2 inch high between the frame and body. After that, the hood hardware to work fine.

Now the hard part, any idea what I did wrong? Was there some kind of bumper or other material besides the foam and other insulation that I needed to use to set this gap? Or more importantly any suggestions how to set a gap as Jeff suggested that will be more sturdy and suffice while I am driving in gel coat?

Thanks
Glenn
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