Rubbers holders for the exhaust

[Alex Roux]

Hi

I have three rubber holders that keeps my exhaust pipe in position.
Whenever I rough it a little on sand or rocks, these seem to eventually break.
Since I got the new exhaust on in October 2011, I have replaced all three rubber holders in December, and need to do so again now.
I do not think it is due to heat as I have checked them after some driving whether they get hot. The brackets on the exhasut pipe don't transfer that much heat from the pipe.
I suspect that the work my car is doing is such that the normal rubber holders simply dont cope.

So on my way back from Wtisand all three were gone and I used some blou draad on one of the brackets to prevent the whole pipe from breaking off.

Is there any advice in this regard? Stronger non-standard rubber clips? , or something one can do in addition to the rubber holders to make the holding together of the pipe a more robust set-up?

Thanks

[Grootseun]

Alex personally it sounds like a qaulity of the mounts issue to me but i may be wrong - ive seen many rubber mounts last for years on the most 4x4s , unless your system putts excessive strain on the rubber or vibration , maybe somene can comment on that

I do however recomend that you get a flexible coupling or knuckle installed right behind your manifolds so that the exhaust can move more freely from your engine if you havent done so yet , that might help

[Peter Connan]

Alex, are the mountings the standard Nissan ones, or some aftermarket/different ones?

The standard rubbers on the Y60's are great, I don't know about the Y61 though.

I have a similar problem ever since I had a free-flow fitted, because the shop that fitted it was too lazy to use the originals, and used a generic rubber instead, which is not up to the job.

[Grant]

Alex,


Agree with Peter and Driko. Problem could be the setup of the system. Is it correctly aligned to the hangers and are the rubbers in a relaxed state or streached to almost max. My Troll has the standrd nissan units on and have never been changed.


Flex down pipe would alss be an option. Your right foot really gets that V8 going, and with that the engine does twist on its moutings.

[AndriesS]

I would also suggest a flexible coupling on the exhaust, could also be that the engine is moving a lot under power and it might be worthwhile to check the stiffness of the engine mountings. the exhaust might be your indicator that other components are taking strain such as the radiator as well.

[Alex Roux]

All, thanks for the advice.

Currently I have generic rubbers fitted for the after market free flow exhaust.

Take home thoughts:
1) Are the hangers correctly alligned and the rubbers in a relaxed state when stationary?
2) Check the stiffness of the engine mountings, and are these taking strain when I "put foot"?
3) If 1 and 2 above are ok, consider flexible coupling or knuckle

Thanks