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post #6 of 33 (permalink) Old 18th June 2014
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Re: How necessary is a Bumper undertray?

You could invest a bit of time and effort and get it to work very well.

Cut a section where the sump plug would be located and use a couple of cable ties to hold it in place, plus using a few cable ties to augment the fixings that DO line up will be time well spent as it will reduce noise and stress placed on the undertray - you don't want it getting ripped off at speed, causing damage to your car, and a hazard to others.

30 mins is really how long it should take you to having a job you can be rightly proud of.



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post #7 of 33 (permalink) Old 18th June 2014
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Re: How necessary is a Bumper undertray?

Undertrays reduce the risk of debris being thrown up into the engine bay. If small stones or such get caught in the auxilairy belt area it can ultimately lead to timing belt failure resulting in serious engine damage. They also help reduce water ingress and with so many electriocs on modern engines they need all the protection they can get.

Such trays can also help reduce engine noise. Noise from the engine is absorbed by the plastic where as if the tray is not present the sound is relected back up from the hard road surface.

A neighbour of mine removed the undertray from his small Puegot van when changing the oil and never bothered replacing it. A few weeks later the timing belt failed - small sticky tarry stones had become lodged on the auxiliary belt resulting in timing belt failure.

You may get away with running without one but why take the risk
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post #8 of 33 (permalink) Old 18th June 2014
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Re: How necessary is a Bumper undertray?

I've been given to understand that it's primary role is the keep road water spray out of the engine bay because of all the electronics and sensors etc. in there, which will not enjoy being sprayed energetically with dirty water at all. Speshly going through puddles / surface water.

So I think it's essential, proof of pudding, next time you're caught out on the motorway in a torrential downpour of the type where it's like god has just emptied his bath


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post #9 of 33 (permalink) Old 18th June 2014 Thread Starter
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Re: How necessary is a Bumper undertray?

Thank you guys I think I'll keep it. It's temporarily removed for now though as I don't want it coming off at speed and causing dangerous flying objects on the motorway, especially since I'm back and forth to London every day at the moment.

So I'll spend some time at the weekend & see if I can do anything with it. Alternatively, I might try and locate a genuine renault one I'll keep an eye on the local scrappy

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post #10 of 33 (permalink) Old 18th June 2014
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Re: How necessary is a Bumper undertray?

You might even be able to obtain one from the comfort of your home.

BTW For what it's worth IMO if it wasn't required Renault wouldn't fit it.

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