jibjob
Member
Registered: 6th Apr 08
Location: Elworth, Cheshire
User status: Offline
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Can someone please explain to me what they are for on the exhaust! I know that they are there to hold the 2 pieces together but i dont get why there isnt just two normal bolts as they wont flex anyway. The threads are naffed on my down pipe where it joins the CAT so the original bolts wont stay in anymore and cant be tightened up enough to create a good seal. Can i just put normal bolts with no springs through the holes and tighten them up? Any help would be great! 
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johnhara1
Member
Registered: 19th Oct 06
Location: Newcastle upon Tyne
User status: Offline
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On mine, i removed the old bolts on springs, drilled bigger holes and put normal bolts in.
I didn't have any problems, i assumed the springs were there to help the bolts come out considering they will be baked on.
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jibjob
Member
Registered: 6th Apr 08
Location: Elworth, Cheshire
User status: Offline
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Spot on cheers mate. I had normal bolts but they were slightly too short so i had to cut a coil or two off the springs but if i dont need them they can be binned!
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alan-g-w
Member
Registered: 9th Nov 07
Location: Glasgow
User status: Offline
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The spring bolts are there because the exhaust needs to move freely from the engine and car. The reason why exhausts are done with rubber hangers is because of this as well. If you replace the sprung bolts with normal bolts you're eleiminating the flex needed (think of it like suspension for the exhaust) and risk breaking the manifold flange off.
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davieslim
Member
Registered: 15th Sep 08
Location: Glasgow City
User status: Offline
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its basically what alan said, as the exhaust has no real flexi the joint between the down pipe and cat acts as a flexi so the springs give the pressure but not enough to stop the exhaust having some play to stop it being damaged
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daine
Premium Member
Registered: 28th Feb 07
Location: rossington
User status: Offline
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Well said alan-g-w, it`s called a `freedom-of-movement-joint`and is fittered to all transverse engined cars
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jibjob
Member
Registered: 6th Apr 08
Location: Elworth, Cheshire
User status: Offline
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The only problem is the threads appear to be nackered in the downpipe flange as the original bolts could be moved up and down by hand even though they were tight. Best thing to do now then? Get some longer bolts and put a nut on the other side but keep the springs?
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alan-g-w
Member
Registered: 9th Nov 07
Location: Glasgow
User status: Offline
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New nuts and bolts should be fine mate, just replace the fucked ones.
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