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Pretzel
Hockenheim


Joined: 20 Apr 2014
Posts: 699
Location: Bedfordshire


PostPosted: Tue Feb 19, 2019 7:30 pm    Post subject: Exhaust tips - how close to rear PU bumper Reply with quote

After replacing the engine mountings (narrow body C2) exhaust tips are now touching the rear PU bumper valence.

So, how much of a gap do I need to leave to avoid heat damage to the PU?

There seems to be a fine balance between providing adequate clearance and the exhaust tip appearing to point down which doesn't look right.
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Alex
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 16672
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Tue Feb 19, 2019 7:32 pm    Post subject: Reply with quote

Won't do any damage apart from maybe wear the paint off as they don't get hot enough (not on a 996 anyway). Rule of thumb, I always say enough to get your little pinky inbetween.
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Endoman
Barcelona


Joined: 11 Apr 2011
Posts: 1395
Location: Bolton U.K.


PostPosted: Tue Feb 19, 2019 8:34 pm    Post subject: Reply with quote

I reckon 5mm, you could modify the w/b shield or fabricate something. They will melt the pu if they touch. I put a 5mm spacer on the engine mounts to drop the engine a bit. RS mounts with extra RS spacer. I spent ages getting the wide oval tips just where I wanted them even to the extent of trimmimg a bit off the silencer hanger hook.
A tail pipe fell off mine and the exhaust gases melted the pu so badly I had to replace it.
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Allan E
Silverstone


Joined: 17 Jun 2017
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PostPosted: Tue Feb 19, 2019 9:38 pm    Post subject: Reply with quote

The gap on my car is approx 20mm, the exhausts are the originals as are the tips so I am assuming the gap is as standard.
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decgraham
Barcelona


Joined: 17 Sep 2008
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PostPosted: Wed Feb 20, 2019 7:28 am    Post subject: Reply with quote

Hi,

Here's a pic of how mine sit. Thumb

ATB Smile
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Alex
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 16672
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Wed Feb 20, 2019 7:54 am    Post subject: Reply with quote

Allan E wrote:
The gap on my car is approx 20mm, the exhausts are the originals as are the tips so I am assuming the gap is as standard.


It's all dependant on how much your engine mounts have sagged. Are they new?
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NIBrown
Nürburgring


Joined: 10 Oct 2010
Posts: 420
Location: South Wales


PostPosted: Wed Feb 20, 2019 7:58 am    Post subject: Reply with quote

alex yates wrote:
Allan E wrote:
The gap on my car is approx 20mm, the exhausts are the originals as are the tips so I am assuming the gap is as standard.


It's all dependant on how much your engine mounts have sagged. Are they new?


Agreed that engine mounts will play a large part on how the tips sit.
I changed my mounts for C4 as the old oil-filled ones weren't at their best, had to make quite large adjustments to the tips as they were touching.
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Cameltoe & Heel
Barcelona


Joined: 26 Jan 2009
Posts: 1335
Location: Preston - Lancs


PostPosted: Wed Feb 20, 2019 8:31 am    Post subject: Reply with quote

I've pretty much replaced everything, inc C4 mounts, mufflers and hangers, and still able to centralise, you should too. It would do my noggin in if I couldn't get a decent gap.

What engine mounts did you use and what tips you got?, big ovals are obviously bigger and therefore not as much gap.



Trev

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Tobesetc
Albert Park


Joined: 02 Jun 2014
Posts: 1570
Location: West London, UK


PostPosted: Wed Feb 20, 2019 9:46 am    Post subject: Reply with quote

Pic from slightly lower angle than would be perfect...
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Pretzel
Hockenheim


Joined: 20 Apr 2014
Posts: 699
Location: Bedfordshire


PostPosted: Wed Feb 20, 2019 7:44 pm    Post subject: Reply with quote

Thanks everyone for your replies, very useful especially the photos.

Exhaust tips were on the car when I purchased it, they look like big ovals or similar and were a nice fit before fitting the new engine mounts (genuine OPC C4 mounts)

Current gap is even all round about 20mm but doesn't look quite right so I will try adjusting them again, reducing the gap taking into account your comments.

I would be interested in seeing a side shot taken low down if anyone has one available.
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decgraham
Barcelona


Joined: 17 Sep 2008
Posts: 1359
Location: Spain


PostPosted: Thu Feb 21, 2019 10:04 am    Post subject: Reply with quote

Here you go, hope this is what you are looking for Thumb

Oh my engine sits on C4 mounts.

ATB Smile
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Endoman
Barcelona


Joined: 11 Apr 2011
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Location: Bolton U.K.


PostPosted: Thu Feb 21, 2019 11:50 am    Post subject: Reply with quote

Porsche wide ovals, circumferencial clearance 15mm . On full Fabspeed system. Please excuse finger prints. No oil drips Very Happy
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jonttt
Long Beach


Joined: 20 Aug 2012
Posts: 6114
Location: Liverpool


PostPosted: Thu Feb 21, 2019 12:15 pm    Post subject: Reply with quote

alex yates wrote:
Won't do any damage apart from maybe wear the paint off as they don't get hot enough (not on a 996 anyway). ...........


Hand what a perfect opportunity for a kettle comment Wink
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