Smog pump seized,can a guy run a shorter belt to run accessories?

09-06-2002, 07:48 PM

This is in a supercharged application

smog pump froze causing the belt to break,so what I was wonderin is,if a guy could just run a shorter belt for the accesssories or am I lookin at buyin another smog pump?

Maroon 5.0 LX · 09-06-2002, 07:53 PM

I put a rebuilt one on my older van a couple of years back from Auto Zone, and it only cost about $20.

If you have emission testing, better just put one on.
It's a fairly easy job.

jimberg · 09-06-2002, 09:14 PM

If you have no cats then, yes, you can just run a short belt. If you have cats, you should replace it so that sufficient air is pumped to the cats so that they work. If you don't , they will eventually get clogged.

09-07-2002, 02:43 PM

Gonna see if I can find some string or a tape measure and get a measurement for a shorter belt.

bigblockcoupe · 09-07-2002, 02:49 PM

thats the best way to measure for a shorter belt i usually use a string then subtract about a 1/4 inch and find the closest belt size if they don't have an exact fit (they never have the exact size you need) i have had to be pretty creative at times trying to fit a belt on that was just a little too small but a little too small is better than a little too big

jimberg · 09-07-2002, 04:14 PM

Remember to reverse the S that goes around the crankshaft and water pump when going with a shorter belt. This will keep the belt from hitting itself up by the tensioner.

fiveohpatrol · 09-07-2002, 09:12 PM

Quote:

Remember to reverse the S that goes around the crankshaft and water pump when going with a shorter belt. This will keep the belt from hitting itself up by the tensioner.

yah i had a problem with that when i bypassed mine, it was fine at first but when it stretched a little it rubbed and broke the belt.
All i did to fix it was to remove the tensioner, and drill a new pilot hole in the mounting bracket for the little nub on the back of the tensioner so I could rotate it counterclockwise about 45degrees

jimberg · 09-08-2002, 12:16 AM

That's way more than you needed to do. You just needed to change the routing so that the belt goes around the alternator from the bottom of the crankshaft pulley instead of the top of the water pump pulley. Attached is a diagram. Make sure that when you measure for a new belt that you measure the same belt routing that is in red.

fiveohpatrol · 09-08-2002, 02:56 AM

Hmm, that IS way more than I needed to do

bigblockcoupe · 09-08-2002, 07:29 AM

the only thing about routing the belt that way is you will be spinning the water pump backwards while most of the time it doesn't matter (I have run my cobra like this for years) I have had a couple of cars that would heat up with the pump spinning in reverse(my coupe got over 220 degrees so i rerouted the belt to spin the other direction and the temp went back down.

jimberg · 09-08-2002, 09:46 AM

Quote:

the only thing about routing the belt that way is you will be spinning the water pump backwards while most of the time it doesn't matter (I have run my cobra like this for years)

Nope, look again. As long as you route it so that the back side of the belt is on the water pump pulley, it is rotating the correct way. Draw the arrows and you will see what I mean.

bigblockcoupe · 09-08-2002, 11:17 AM

yeah your right that does spin it the wrong way i didn't really look at it good before thanks.

09-08-2002, 02:17 PM

Went out and measured for the belt length that I need,the closest belt so far that might work is 65 inches.

09-06-2002, 07:48 PM	#1
Mustanguy Guest Posts: n/a	Smog pump seized,can a guy run a shorter belt to run accessories? This is in a supercharged application smog pump froze causing the belt to break,so what I was wonderin is,if a guy could just run a shorter belt for the accesssories or am I lookin at buyin another smog pump?

09-06-2002, 07:53 PM	#2
Maroon 5.0 LX Registered Member Join Date: Mar 2001 Location: Southern Maryland Posts: 471	I put a rebuilt one on my older van a couple of years back from Auto Zone, and it only cost about $20. If you have emission testing, better just put one on. It's a fairly easy job. __________________ '89 LX 5.0 - 5 speed. Original Owner '94 E-150 4.9 Hi-Top Conversion Van '06 Mustang V-6, 5 speed

09-06-2002, 09:14 PM	#3
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	If you have no cats then, yes, you can just run a short belt. If you have cats, you should replace it so that sufficient air is pumped to the cats so that they work. If you don't , they will eventually get clogged. __________________ 351W 89 Mustang GT Convertible

09-07-2002, 02:49 PM	#5
bigblockcoupe Registered Member Join Date: Aug 2002 Location: broken arrow Posts: 212	thats the best way to measure for a shorter belt i usually use a string then subtract about a 1/4 inch and find the closest belt size if they don't have an exact fit (they never have the exact size you need) i have had to be pretty creative at times trying to fit a belt on that was just a little too small but a little too small is better than a little too big __________________ Rice Haters Club member #68 '93 Cobra 10.20@135 '89 Gt Coupe 12.20@115

09-07-2002, 04:14 PM	#6
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	Remember to reverse the S that goes around the crankshaft and water pump when going with a shorter belt. This will keep the belt from hitting itself up by the tensioner. __________________ 351W 89 Mustang GT Convertible

09-07-2002, 02:43 PM	#4
Mustanguy Guest Posts: n/a	Gonna see if I can find some string or a tape measure and get a measurement for a shorter belt.

09-08-2002, 02:56 AM	#9
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	Hmm, that IS way more than I needed to do __________________ NMRA O/C 9516 NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft

09-08-2002, 07:29 AM	#10
bigblockcoupe Registered Member Join Date: Aug 2002 Location: broken arrow Posts: 212	the only thing about routing the belt that way is you will be spinning the water pump backwards while most of the time it doesn't matter (I have run my cobra like this for years) I have had a couple of cars that would heat up with the pump spinning in reverse(my coupe got over 220 degrees so i rerouted the belt to spin the other direction and the temp went back down. __________________ Rice Haters Club member #68 '93 Cobra 10.20@135 '89 Gt Coupe 12.20@115

09-08-2002, 11:17 AM	#12
bigblockcoupe Registered Member Join Date: Aug 2002 Location: broken arrow Posts: 212	yeah your right that does spin it the wrong way i didn't really look at it good before thanks. __________________ Rice Haters Club member #68 '93 Cobra 10.20@135 '89 Gt Coupe 12.20@115

09-08-2002, 02:17 PM	#13
Mustanguy Guest Posts: n/a	Got a measurement Went out and measured for the belt length that I need,the closest belt so far that might work is 65 inches.

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