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Exhaust help



 
 
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  #1  
Old July 13th 05, 04:45 AM
Alex Rodriguez
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Default Exhaust help

I decided to do a good deed and change the rusted center pipe on my inlaws 88
Accord. Of course this is turning into a bigger job than expexted. I finally
got pipe out but cutting and grinding the bolts that held the pipe to the cat
convertor. I thought I could just push the bolts out, but apparently not. Any
tips on getting these bolts out?
----------------
Alex

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  #2  
Old July 13th 05, 05:16 AM
jim beam
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Alex Rodriguez wrote:
> I decided to do a good deed and change the rusted center pipe on my inlaws 88
> Accord. Of course this is turning into a bigger job than expexted. I finally
> got pipe out but cutting and grinding the bolts that held the pipe to the cat
> convertor. I thought I could just push the bolts out, but apparently not. Any
> tips on getting these bolts out?
> ----------------
> Alex
>

the bolts are captive & come with the pipe. oem pipe anyway. if you
can seperate the pipe from the converter, you should be in business for
replacement.

  #3  
Old July 13th 05, 01:28 PM
Abeness
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jim beam wrote:
> Alex Rodriguez wrote:
>
>> I decided to do a good deed and change the rusted center pipe on my
>> inlaws 88 Accord. Of course this is turning into a bigger job than
>> expexted. I finally got pipe out but cutting and grinding the bolts
>> that held the pipe to the cat convertor. I thought I could just push
>> the bolts out, but apparently not. Any tips on getting these bolts out?
>> ----------------
>> Alex
>>

> the bolts are captive & come with the pipe. oem pipe anyway. if you
> can seperate the pipe from the converter, you should be in business for
> replacement.
>


The bolts between converter and center pipe (Pipe B) are actually
separate, and are called "converter bolts". On my 94 Civic these are
specialty bolts (not cheap, same for the 88 Accord) that have a thin,
flat head and "ridged" spine designed to grip in the holes in the
converter and help prevent the bolt from turning as you apply the nut.

I tried to get mine out but found that the rust was more than I could
handle with my equipment. Mechanic charged me $75 to do it. Maybe try
heat and hammering them out with a punch from the Pipe B side? Just be
careful not to pound so hard that you damage either the cat or Pipe A,
both of which cost a lot. Might be better to drill them out.
  #4  
Old July 13th 05, 01:34 PM
butch burton
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I used a 5" angle grinder (wear a full cover face mask when doing this)
and cut them off both ends of the cat - both nut end and bolt end.
Removed the pipes and cat and drilled out the bolts in the cat and
replaced them with new bolts. Be careful with the cat sensor - it will
disconnect.

  #6  
Old July 14th 05, 03:26 AM
Alex Rodriguez
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Default

In article >, says...

>The bolts between converter and center pipe (Pipe B) are actually
>separate, and are called "converter bolts". On my 94 Civic these are
>specialty bolts (not cheap, same for the 88 Accord) that have a thin,
>flat head and "ridged" spine designed to grip in the holes in the
>converter and help prevent the bolt from turning as you apply the nut.
>
>I tried to get mine out but found that the rust was more than I could
>handle with my equipment. Mechanic charged me $75 to do it. Maybe try
>heat and hammering them out with a punch from the Pipe B side? Just be
>careful not to pound so hard that you damage either the cat or Pipe A,
>both of which cost a lot. Might be better to drill them out.


Thanks for the tip. I tried pounding on the bolts with a hammer, not a big
one, and they bolts would not budge. I tried drilling them out, but my drill
bits were not up to the task. I'm going to buy a couple of decent bits before
I try again this weekend. Since I am going to drill them out, I'm not going to
bother with the special bolts.
----------------
Alex


  #7  
Old July 14th 05, 03:49 AM
jim beam
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Alex Rodriguez wrote:
> In article >, says...
>
>
>>The bolts between converter and center pipe (Pipe B) are actually
>>separate, and are called "converter bolts". On my 94 Civic these are
>>specialty bolts (not cheap, same for the 88 Accord) that have a thin,
>>flat head and "ridged" spine designed to grip in the holes in the
>>converter and help prevent the bolt from turning as you apply the nut.
>>
>>I tried to get mine out but found that the rust was more than I could
>>handle with my equipment. Mechanic charged me $75 to do it. Maybe try
>>heat and hammering them out with a punch from the Pipe B side? Just be
>>careful not to pound so hard that you damage either the cat or Pipe A,
>>both of which cost a lot. Might be better to drill them out.

>
>
> Thanks for the tip. I tried pounding on the bolts with a hammer, not a big
> one, and they bolts would not budge. I tried drilling them out, but my drill
> bits were not up to the task. I'm going to buy a couple of decent bits before
> I try again this weekend. Since I am going to drill them out, I'm not going to
> bother with the special bolts.
> ----------------
> Alex
>
>

ordinary bolts will soften & creep at high temperature. and the exit of
the cat is /very/ high temperature!

  #8  
Old July 14th 05, 08:01 PM
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"jim beam" > wrote in message
...
> Alex Rodriguez wrote:


> ordinary bolts will soften & creep at high temperature. and the exit of
> the cat is /very/ high temperature!


What is the difference between ordinary bolts and the ones you refer to,
Jim?


 




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