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[Dany]

I have some problems with my park pilot system, it's not working anymore! So I want to replace it... Bosch proposes to me the newer model, the URF-7, but the sensors are smaller so I have a problem with the holes drilled on the bumper... No way to find another bumper without holes, it's an Irmscher one!! 

But if I find a way to "re-make" the holes properly, I will buy the Meta-system sensors. They looks very nice, with "an internal fitting", like the new BMW's parkpilot. 

Any helps to re-make these holes in the same place? A way to do so that the futur paint will not crack due to driving vibrations and little collisions 
Does anyone here has done this job already?

[Dany]

Up...

[bigegg]

rubber grommets to reduce the hole size?
or, my personal favourite bodge: epoxy putty

[Gaffers]

epoxy fibreglass the back and putty the front in the hole.  Fair it all once cured and redril to the correct size 

[Dany]

epoxy fibreglass the back and putty the front in the hole.  Fair it all once cured and redril to the correct size 

And the new paint will not move/crack?

[Broomies Mate]

Whatever you fill the holes with, any slight bump will crack the paint and probably dislodge the in-fill.

You could use a down-sizing gromet, but it wont look pretty.

If it were me, I'd remove the bumper, use PLENTY of fiberglass matting to coat the inside, fill the holes with fibreglass and use a couple of sheets on the exterior, sand progressively until the determined finish is required.  Then paint.

Unless you have a good knowledge of the products and an experiencedd hand with a spray gun, I'd pay to have the job done and done properly. 

[Gaffers]

If you are talking poly resin then forget it.  It won't key properly to the plastic/fibreglass.  With a good key epoxy will and as long as it is done correctly it won't crack or budge.  I use a similar technique when fixing boats and they don't just get bumped but have to flex and deal with being watertight.  No probs so far.....

[twiglet]

Or you could just buy a working park pilot setup with the correct sized sensors for your bumper, and then sell your system on to recoup your money... 

[Andy B]

surely the best solution to fitting smaller reverse sensors is to fill the larger holes in with a plastic welder and start again?  :-/ :-/ :-/

[albitz]

Or you could just buy a working park pilot setup with the correct sized sensors for your bumper, and then sell your system on to recoup your money... 

That sounds to me like the most sensible option by far. They dont come up for sale that often though, and tend to command pretty strong prices when they do. What price to stop a nice irmscher bumper from acquiring a bodged look though ? 

[Dany]

surely the best solution to fitting smaller reverse sensors is to fill the larger holes in with a plastic welder and start again?  :-/ :-/ :-/

I like your solution Andy, does it really works? It won't be fragile? I always prefered welds instead chemicals... Never tested on plastic bumper and don't know anyone that has done this...

To Twiglet: If I have to replace the parkpilot set, I would prefer to buy the new model, much prettier and cheaper than these ones! I have found the new Bosch URF7 for 130 Euros!

[Andy B]

surely the best solution to fitting smaller reverse sensors is to fill the larger holes in with a plastic welder and start again?  :-/ :-/ :-/

I like your solution Andy, does it really works? It won't be fragile? I always prefered welds instead chemicals... Never tested on plastic bumper and don't know anyone that has done this...

To Twiglet: If I have to replace the parkpilot set, I would prefer to buy the new model, much prettier and cheaper than these ones! I have found the new Bosch URF7 for 130 Euros!

I had a motor bike side panel plastic welded OK. If you use the same kind of plastic to fill the hole then being fagile shouldn't be a problem, depends how good the body shop is  If you're doing it yourself you could practice on A N Other bumper before you commit to your Irmscher bumper.