question about smog pump bypass

cb18201 · Jun 25, 2004

i am replacing my belt soon and i want to bypass the smog pump but im not taking it off until i do heads sometime in the near future, will it hurt anything to just bypass the pump without taking it off or unhooking any of it orwill it set off and check engine lights or anything like that? also does anyone have a part number of the belt that is used when bypassing it. any part number off any belt you have used for this is fine. thanks

RedHot91GT · Jun 25, 2004

Thats how my car is right now. All I did was plug the vacum hoses that go to the smog tubing. I dont know about setting off a check engine light, because I think mines broke anyway. But if its not broke then it didnt set it off.

oh nm I was talkin about the fox.

cb18201 · Jun 25, 2004

yea i still have a/c, i dont wanna take it off until i do heads, it will just make it easier for me when everything is apart so for now i just wanna bypass it but leave it on there. so it wont mess anything up to leave all the lines and hoses intact and just bypass that one pulley? im not gonna touch any of the hoses or vacume lines yet.

RedHot91GT · Jun 25, 2004

Not that I know of. But Im not positive on that. My car seems fine...

Mrgreen94gt · Jun 25, 2004

It'll do fine. Bypassing it and leaving it there is the same difference as removing it all in terms of the car running.

mo_dingo · Jun 25, 2004

So you can just disconnect the vacuum line going to the smog pump, and that will stop it working?

Scott

Mrgreen94gt · Jun 25, 2004

mo_dingo said:
So you can just disconnect the vacuum line going to the smog pump, and that will stop it working?

Scott

Without bypassing it with a short belt, it will still spin the pump. Doing that may be damaging to the pump which could run the risk of it seizing up.

RedHot91GT · Jun 25, 2004

Mrgreen94gt said:
Without bypassing it with a short belt, it will still spin the pump. Doing that may be damaging to the pump which could run the risk of it seizing up.

Mine seized while driving... Man did that suck. Thats why I bypassed it..

Mrgreen94gt · Jun 25, 2004

RedHot91GT said:
Mine seized while driving... Man did that suck. Thats why I bypassed it..

That would suck! I got lucky, mine started clattering and rattling but the pulley never stopped spinning.

95GTeee · Jun 26, 2004

I just gutted mine! Now I have the stock air pump there with no internals. Basically, a free spinning pulley! I still have all the smog lines hooked up and it looks like an unaltered emission system, but I opened the smog pump and pulled the carbon/fiberglass vanes outta it, lubed up the bearings and the shaft, and closed it back up. It's easy to do from underneath the car.

cb18201 · Jun 28, 2004

for this, people told me i had to use an 89.5 belt. i got one and it was too short, so im guessing i need a 90 belt. idk

gcomfx.com · Jun 28, 2004

I had to use one that was too tight as well. The one that was just tight, stretched over a couple days and started clanking the tensioner pulley.

I'll find the part number I used. It was a gates belt from O'Reilly's and was metric.

What I had to do was stretch the damn thing with my foot and heat it up some, then with two different grabs on the tenstioner pulley, I finally got it "half" on.... a few cranks and it slid on.... stretched out while on the car and seems to be fine. Driven a month on it with no problems.

question about smog pump bypass

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