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Hood Flaping Cure

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40K views 46 replies 27 participants last post by  Earthworm51  
#1 ·
I was waxing the hood the other day and I noticed something really interesting.
I popped the hood to wax the top edges of the fenders and while I was doing it I couldn't believe how much the hood wiggles when released to the safety catch. So I got to pressing and wiggling and thinking, noticing how pressing on one front edge of the hood would make the opposite corner "flap" around. It seems the hood relies on 2 hinges, 2 hood stops, 2 bumpers, and the center catch to keep the hood still. A loose front corner can actually make the opposite rear corner move! The hinges and the center catch are not enough to keep the hood still. Adjustment of the hood stops is strangely critical. Too high and the rubber bumpers on the front edge corner of the hood do not contact. Too low and the hood has a loose fit and the rubber bumpers on the front edge corner of the hood allow the hood to rub on the fender. This photo shows the point to check for rubbing caused by low hood stops.


This is a hood stop. A simple large plastic bolt.




Checking the fit is easy. I took a 4 gobs of car wax (since I had it right there) and put them on the 2 stops and the 2 rubber bumpers. Then I carefully pressed on the center of the hood until it locked into the closed position. Do not slam! You will get hood flex resulting in inaccurate wax transfer. At first, only one stop and one bumper were in contact on opposite sides. Evidenced by wax transfer. So I lowered the higher stop and raised the lower stop. After doing this several times, wiping off the wax, reapplying and closing the hood. I came to a point where all 4 contact points had equal amounts of wax transfer. Now the hood seems tight and well positioned.

Give it a try. It can't hurt.
 
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#3 ·
I noticed they were too low on my Patriot. I found they turned/lowered by themselves (likely due to vibration). I have since taped them around the threads to keep them from lowering.

I am going to try the 'wax' tip, great idea.
 
#4 ·
great info thanks man I was wondering bc it looked like I had movement from the hood at speeds of 70-85mph
 
#6 ·
Thanks for that very useful bit of info,yesterday due to my heart stopping incident the other day with my bonnet I decided to adjust a few things as spoken about on a previous thread.

My system was slightly different,I adjusted the rear hinge stops first taking out the lift then wound down the front stops totally turning each one up in equal amounts and slowly rocking the front of the bonnet until this was taken out.I confirmed the height adjustment using a tape measure taking a reading from the base of the stop frame to one of the under side nut flats on the stop on either side of the bonnet,mine was 3/4" but this will obviously differ on vehicles.:doh:

I have not tried high speed driving yet but the bonnet looks solid enough hopefully it will do the trick.:)
 
#7 ·
Thanks for the advice, Jeepster67 and Greenman. I'm going to try it later today. Then, have you checked that your hood doesn't flap any more now? Yesterday again I had to drive fast and in windy conditions and the flapping hood scared my girlfriend who was at the wheel.
 
#9 ·
It might be useful to know that the Body Repair Manual (page 363 found at Nearly Normal Jimmy's site) states that the gap between the hood and front fascia should be of 9.3 +/- 1.5 milimeters. And between hood and side fender 6.5 +/-1.5 mm
 
#10 ·
I'm not near my car right now, but I'd say I have much closer gaps hood to fender in the front. More like 3mm. But it is almost 10 near the hinge. If I'm thinking in metric correctly ;)
 
#11 ·
Flapping Hood.....please help!!!

I finally met my flapping hood today at speeds between 65-75 mph. :wow: It was scary! I remembered instantly of reading about the flapping hood on here sadly to say. Nevertheless is this the fix??? Please let me know, so I can tell my hubby to fix it before I travel the interstate for 5 hrs oneway next month for a vacation.
 
#13 ·
I finally met my flapping hood today at speeds between 65-75 mph. :wow: It was scary! I remembered instantly of reading about the flapping hood on here sadly to say. Nevertheless is this the fix??? Please let me know, so I can tell my hubby to fix it before I travel the interstate for 5 hrs oneway next month for a vacation.
Yes it will cure it. Also look for a thread by Greenman concerning adjustment of the center catch. These two adjustments will cure the movement in the hood.
 
#14 ·
Oh, I don't know....If I were a mechanic I might just replace parts to get a customer to quit breathing down my neck.

And if they did not adjust the stops and the catch, you bet, the flapping will come back.
 
#15 · (Edited)
Oh dear, what are we going to do?? I gather Jeep will not fix it?? If they even can, that is. I'll be callling my dealer tomorrow to see what they say...brush off I suspect? Any great fix advice will be greatly appreciated!!


__________________________________________

Okay, I will check into that Jepstr67. Thanks so much!!!
 
#21 ·
If you still have trouble, check out a thread by Greenman, where he shows how to adjust the center catch.
 
#31 ·
Back on topic please!

:hijacked::wrongforum:

How Did this get so far off of the examination process and repair of hoods that don't fit quite right?:mad:
 
#32 ·
I was waxing the hood the other day and I noticed something really interesting.
I popped the hood to wax the top edges of the fenders and while I was doing it I couldn't believe how much the hood wiggles when released to the safety catch. So I got to pressing and wiggling and thinking, noticing how pressing on one front edge of the hood would make the opposite corner "flap" around. It seems the hood relies on 2 hinges, 2 hood stops, 2 bumpers, and the center catch to keep the hood still. A loose front corner can actually make the opposite rear corner move! The hinges and the center catch are not enough to keep the hood still. Adjustment of the hood stops is strangely critical. Too high and the rubber bumpers on the front edge corner of the hood do not contact. Too low and the hood has a loose fit and the rubber bumpers on the front edge corner of the hood allow the hood to rub on the fender. This photo shows the point to check for rubbing caused by low hood stops.
View attachment 2176

This is a hood stop. A simple large plastic bolt.


View attachment 2177

Checking the fit is easy. I took a 4 gobs of car wax (since I had it right there) and put them on the 2 stops and the 2 rubber bumpers. Then I carefully pressed on the center of the hood until it locked into the closed position. Do not slam! You will get hood flex resulting in inaccurate wax transfer. At first, only one stop and one bumper were in contact on opposite sides. Evidenced by wax transfer. So I lowered the higher stop and raised the lower stop. After doing this several times, wiping off the wax, reapplying and closing the hood. I came to a point where all 4 contact points had equal amounts of wax transfer. Now the hood seems tight and well positioned.

Give it a try. It can't hurt.

Son of a! Just looked at my hood there and I have some freaking paint chips from the hood bouncing around! Adjusted the 2 stops so hopefully that will take care of any further damage.
 
#33 ·
Damn!!! Mine's got a big scratch where it meets because of this!!
Taking it back to the dealer this afternoon (the Riot has 1000 km and 1 month). I'll let you know what happens (should be covered right????)

Still....this should have been checked at the factory!!
 
#34 ·
They go out of adjustment rather easily, from my experience. I've adjusted mine several times.

I think someone should combine all the posts on the hood adjustments, hinges, stop pillars, latch, and make one good DIY post for the Knowledge Base.