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post #1113 of (permalink) Old 21st May 2013
lancs dave
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Re: Renault Clio 2 - Bonnet Catch Failures

Originally Posted by nizmo View Post
Thanks all,

I'm perfectly capable, I have thought I should just do that. I take its the catch itself that gets stuck and doesn't hook onto the bonnet properly once it seizes up ? or what about the secondary catch ? I'm guessing the little hook can snap when corroded ? that's if the main catch has failed or one has forgotten to close the bonnet completely ?
Sorry about the essay but it's not just aimed at you.
It's probably all been said in previous posts but worth repeating.

Not sure if the Clio2 phase1 is the same but the following pictures are of a phase2 style catch.

First thing to do is check your catches as they are now.
Go straight to the front of the car and try to lift the bonnet. If it stays firm- good but it still needs lubricating.
If it lifts then stops on the safety catch- not so good.
If it lifts and fully opens- it's your lucky day so read on.

Presuming it stayed firm, go and pull the release handle in the car. The bonnet might pop up a little.
Try and lift the bonnet and it should stop on the safety catch.
Pull the safety catch handle and the bonnet should open.

Picture 1 shows the slam panel with a round hole for the bonnet striker pin and a square hole for the safety catch.
Look closely at the round hole. If the main catch is working properly, the hole should be partly blocked by a sliding plate.
Picture 2 shows the sliding plate which is arrowed.
Yours might not be clean and bright but it should be there.
There doesn't seem to be much of the plate visible in picture 1. A candidate for some work then.
When you shut the bonnet, the head of the striker pin goes into the hole and pushes the plate to one side. The plate should then slide back across ( because of a spring) and lock behind the head of the striker pin.
If the plate is sticking due to rust or being jammed with dry grease and grit, it won't lock behind the head of the pin or it might just jam against the head enough to make the bonnet appear closed.
Give it a tug and the bonnet may pop back up.

That's a poor do, but luckily you have a safety catch as a last defence. Or do you??

Picture 3 shows the safety catch on the bonnet with a safety catch that does work.

If the moving parts of this are sticking or the plastic pull handle is fouling movement, the safety catch might not work properly.
Pull the handle and the metal part with the hook should pull at the same time. Now let go and the whole thing should flick back. (again due to a spring)

If your catches don't work as they should, you need to work out why.
If they are sticking, lubricate right into the catch with WD40 then wipe off any loose crud.
Work the interior bonnet handle a few times and spray again. Once the plate slides and returns under it's own spring pressure, wipe clean and liberally lubricate with an aerosol spray grease.
Do the same with the safety catch on all pivot points and around sliding handle. Some grease points are ringed in picture 3.
Grease behind the sliding handle while you're at it.
Spray grease come out of the can as a thin liquid but after a few moments it sets firmer like proper grease.

Use the spray grease around the bonnet striker pin after a good wipe. Shown in picture 4

A sticking bonnet release cable or the interior handle binding on the carpet could also stop the sliding catch from moving properly so just be aware of those.
Previously damaged bodywork could mean something is bent or moved out of alignment so be aware again.
If the plastic safety catch handle is damaged in a way that restricts movement, get a new one. Any doubts about any part of the locking systems, get it replaced.
Light corrosion of the parts isn't unusual and doesn't mean instant replacement. A good clean up and lube should keep them in decent working order.
Severe corrosion of a part means replacements are needed.

Something I always do when opening a bonnet is to lift it until the safety catch engages, then lower slightly and pull the safety catch handle. That's a good test to see if it works every time you open the bonnet.
Another is, after closing the bonnet, give it a sharp tug to make sure the main catch has locked. I've had a few pop back up that looked closed.

You can lubricate the catches as often as you want, so no excuses for it sticking again.

As for the 'who to blame' stuff, I don't know, I just fix stuff when it doesn't work properly.
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Currently in lancs dave's garage:
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