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exhaust leak on smog junk

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Old 09-29-2005, 08:41 PM
  #1  
lilnor5.0
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Default exhaust leak on smog junk

i have a 1990 mustang gt it had stock headers on it i put a set of mac shortys on it and i can still hear the exhaust leak a budy said my smog pipe is loose i tightend it up i can still hear it but not as bad. Can any body tell me what size belt i need to eliminate the smog pump
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Old 09-29-2005, 08:45 PM
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NegadivOne
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Default RE: exhaust leak on smog junk

It took an 84.5" belt to bypass my smogpump.
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Old 09-29-2005, 08:45 PM
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83beast
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Default RE: exhaust leak on smog junk

either a shorter belt, or a smog eliminator. theyre about 50 bucks. might be the headers. when you put on new headers, or even take off the old ones, you have to tighten up the header bolts three or four times after running it to really snug everything up. the heat loosens the stuff up, so you have to keep crankin them down.
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Old 09-29-2005, 08:52 PM
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Black Snake
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Default RE: exhaust leak on smog junk

I just did mine this weekend, It took a 77inch belt to do mine. I roughted it the old way.

Plus Mac Headers are ****! I have to reshaped them with a torch to get them to fit right and keep it from leaking.
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Old 09-29-2005, 09:48 PM
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NegadivOne
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Default RE: exhaust leak on smog junk

Blacksnake do you still have your ac and powersteering too? Ive never heard of anyone using that short of a belt just to bypass smog.
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Old 09-30-2005, 03:18 AM
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black89gt
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Default RE: exhaust leak on smog junk

hey Black Snake.. you will have trouble iwth taht 77 inch belt man.. i tried it for 1 day and it stretched out and the part where it comes reallly close started to rub.. so i recommened you to get the 84.5 and route it backwards.. as this i am meaning do the opposite way of the crank and fan...
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Old 09-30-2005, 10:24 AM
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86HOGT
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Default RE: exhaust leak on smog junk

Here's how I routed mine with an 84.25" belt. Nice tight fit.

[IMG]local://upfiles/1992/15C022296CB94AC4A888B100C040923F.jpg[/IMG]
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Old 09-30-2005, 02:20 PM
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Black Snake
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Default RE: exhaust leak on smog junk

Yeah I still have my A/c And P/S, I did Buy the 84" belt and tried it the new way but it was still hitting on the smog pump.

Then I tried routing it like 86HO with same belt and still didnt work, was too long, So I just did Trial and error to find the right belt and 77" worked I still Keep my old belt in my trunk with some tools just in case it rips.
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Old 09-30-2005, 02:24 PM
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Black Snake
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Default RE: exhaust leak on smog junk

The top one is the way I routed it.


[IMG]local://upfiles/15818/90CE2DAA50B940CC8A9FE61128DF5716.gif[/IMG]
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Old 09-30-2005, 04:30 PM
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NegadivOne
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Default RE: exhaust leak on smog junk

Oh i gotcha. I didnt do it that way because I heard of people complaining about the tensioner pushing down on the top one and causing the belt to rub against itself right there. I routed mine the bottom way.
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