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smog pump

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Old Dec 31, 2014 | 12:07 AM
  #1  
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Default smog pump

replaced the smog pump on my 85 with another, and runs fine question is the alternator bracket doesnt fit it is about a 1/2 inch off, will it be okay to run with out the bracket, or should i modify a bracket, i checked everything and it seems ok
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Old Dec 31, 2014 | 01:46 AM
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Unsure which bracket you mean. The aft one reduces vibration and all that goes along with it. Frankly, it may be okay w/o, but I figure the GM bean counters wouldn't allow ANY parts that weren't necessary, according to engineering.

Ensure you're putting it back on the right way, too.
1/2" is a lot on that short sucker!
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Old Dec 31, 2014 | 02:10 AM
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The engine vibration will cause the bracket to crack. That's why there are so many braces on the accessories.
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Old Dec 31, 2014 | 12:21 PM
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yeah its the top wishbonebracket connceting the alternator and the pump, i took everything apart even down to the support bracket and re-traced my steps maybe got back alittle room but not much, i am gonna try and improvise something, does anybody know if the have the support bracket that goes from the intake to the pump?
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Old Dec 31, 2014 | 12:38 PM
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Did you compare the old and replacement pumps? That would include the pulley diameter.

I wonder if you got the wrong new part.
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Old Dec 31, 2014 | 01:32 PM
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yeah got one from pat, it was to wide and snapped the mounting bracket, pat ( who has a heart of gold, sent me another pump with the mouting bracket off and 85 went right in, im gonna play around again and retrace my senior moments to triple check i did it right, if not ill just got to lowes or home depot get some actual metal and form a bracket...
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Old Dec 31, 2014 | 03:12 PM
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Maybe you got an 86-91 bracket? I believe your 85 is different.
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Old Dec 31, 2014 | 03:25 PM
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Originally Posted by Dt86
Maybe you got an 86-91 bracket? I believe your 85 is different.
That is correct..'85 was a one year only piece
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Old Dec 31, 2014 | 03:52 PM
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Thanks guys gonna loosen the the belt take the smog pulley off then put the brace on see if it works
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Old Dec 31, 2014 | 03:56 PM
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You're welcome. It always amazes me how many differences there are in the early C4's!
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Old Dec 31, 2014 | 06:07 PM
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Well loosened the belt ,pulled the pulley off the pump , attached the alternator brace to te pump, a little pull with a screw driver down on the alternator ...and presto the aarp member is back I business , man it's a bitch getting old...thanks again rverybody
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