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cleverusername
 Post subject: Downpipe bolt Sprint
PostPosted: Mon Apr 09, 2018 5:18 pm 
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Has anyone got any hints about how to get in the bolt nearest the block on the downpipe? I can't see or reach the damn thing to get a bolt on it.
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Mad Mart
 Post subject: Re: Downpipe bolt Sprint
PostPosted: Mon Apr 09, 2018 5:21 pm 
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I usually remove the heater then use the ring end of a 9/16" combination spanner. You have to do it by feel and only a flat at a time iirc.

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xvivalve
 Post subject: Re: Downpipe bolt Sprint
PostPosted: Mon Apr 09, 2018 7:05 pm 
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Yep, as above, though I have an offset head ring spanner that allows two flats at a time.

If you want new bolts, I bought a small quantity a while ago so I could send three to a member in Australia; I have 17 left!
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cleverusername
 Post subject: Re: Downpipe bolt Sprint
PostPosted: Mon Apr 09, 2018 7:59 pm 
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I am guessing you used a stud? I am trying to put it on with just a nut and bolt combination.
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xvivalve
 Post subject: Re: Downpipe bolt Sprint
PostPosted: Mon Apr 09, 2018 9:48 pm 
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Do not use a nut and bolt combination; the action of the heat means you'll have to cut it off next time!

Use a stud and brass nut if you must, but if assembling with the engine in the car you'll likely have clearance issues trying to get the downpipe squarely aligned with the manifold flange over the protruding studs.

The best solution is the original design of bolts into the helicoiled manifold flange; it may not seem so, but trust me, it is.
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Mad Mart
 Post subject: Re: Downpipe bolt Sprint
PostPosted: Mon Apr 09, 2018 10:07 pm 
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The best solution is the original design of bolts into the helicoiled manifold flange; it may not seem so, but trust me, it is.
:thumbsup:

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cleverusername
 Post subject: Re: Downpipe bolt Sprint
PostPosted: Tue Apr 10, 2018 8:56 am 
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Quote:
Do not use a nut and bolt combination; the action of the heat means you'll have to cut it off next time!

Use a stud and brass nut if you must, but if assembling with the engine in the car you'll likely have clearance issues trying to get the downpipe squarely aligned with the manifold flange over the protruding studs.

The best solution is the original design of bolts into the helicoiled manifold flange; it may not seem so, but trust me, it is.
That never occurred to me. Which size helicoil would I need?
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xvivalve
 Post subject: Re: Downpipe bolt Sprint
PostPosted: Tue Apr 10, 2018 9:51 am 
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3/8" UNF

I acquired a car that had nut and bolt adaptation at this join and had to remove the manifold and downpipe together in order to cut the bolts out!
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