I have an 04 C5 Convertible and the trunk lid pop up spring will not push the trunk open far enough to open.

I had it adjusted once by a mechanic but it is not working again.

Please tell me how to adjust the pop up spring.

I do not have a service manual.

Thanks,

 

they sell these little spring mechanisms for our cars that help pop the latch for like $15, i'm sure if youre somewhat mechanically inclined you can fabricate one yourself

 

You can lubricate and adjust the latch. the rubber stoppers on the trunk lid also adjust to increase the pressure. After about 5 attempts I gave in and made this:

Trunk Popper for a Vert or Z06

This is an easy mod but for those of you who prefer to buy the ready made item it sells for a very reasonable price of $15.95 from one of the Forum vendors. Unfortunately the vendor doesn’t ship overseas so I needed a DIY version:

http://www.c5trunkpopper.com/

If you want to try yourself, pick up a 7/8” compression spring from Home Depot. They retail at $3.98 for a pack of 4 springs, 2 large and 2 small. You’ll also need an end cap of the same diameter. I used a 7/8” rubber stopper ($1.76). The advantage is that it acts as a soft buffer and can be trimmed to fit.




Cut the large spring to a length of 2”. The springs are quite strong so it takes a bit of elbow grease to cut it. Tighten the radius at the cut end of the spring to give a hole to fasten the screw through.

Undo the T30 torx screw on the right hand side of the closure plate. Insert the torx screw down the barrel of the spring and retighten it in place.

Slot the bung in place. You can trim the bung to get whatever fit you prefer. With it as shown it takes a good push to close the trunk. Trimming the bung will make it easier to close..




It took 10 minutes and all the lubrication and fiddling with the lock are a thing of the past.

 

Thanks very much for the info. I'm headed to the hardware store to pick up a spring. This is the best idea I've seen for this problem.

 

I posted this thread over 3 years ago. "TRUNK-FIX". Since then this $2 fix has been marketed upwards of 20 bucks.

 

This was posted some time ago but I have not tried it yet:

Simple fix without attaching the large spring: Take off the rear center carpeted section that covers the lock mechanism. Next to and slightly in front of the latch there will be a spring with about 1 1/2" extended out with a slight bend. This is the piece that pushes the lid up. With closing and age that piece of spring that sticks out begins to bend downward.

Put pliers to it and bend it back up so it extends above the latch mouth.
The amount you bend it is the amount the trunk lid will raise. When you bend the spring up remember to keep it centered or bent towards the latch mouth or it will miss the lid lock. I held mine with a pair of needle nose next to the top retention plate so I wouldn't put pressure on it along with a pair of channel locks to bend it with. I just tried it on mine with needle nose pliers. Couldn't really get a good twist on it so I got a small end wrench and slipped it over the spring and it pulled up on the spring while holding downward pressure on the little plate.

 

Good Afternoon,

I just came from out local hardware store and DeeGee is correct, it took about 10 minutes and my trunk pops open just like it was designed to do.

Thanks to all

 

I all so did this and it works fine.

 

wish i'd've found this thread last week...