SMOG PUMP
Posting Guru
Joined: Jun 2003
Posts: 2,314
Likes: 0
From: southwest michigan
Thread Starter
|
New User
Joined: Feb 2010
Posts: 6
Likes: 0
I recently removed my "soon to lock up" air pump on my 5.8. While shopping for the plastic idlers (which had developed flat spots) I found that there were 2 different types available for the tensioner. 150s got plastic, 250s got metal which is what I bought.
Initially, I tested alternate routing the original belt. By going "over" the fixed idler, under the tensioner, then around the Alt, then back to the crank. This actually worked. However, the Alt would squeal for few seconds when first cranked and when put under heavy electrical load.
Since I didn't care for that, I took a length of 3/8ths-7/16ths heavy nylon rope, routing the rope under the tensioner first (after it comes off the AC compressor) completely by-passing the upper idler, then looping the Alt before returning to the crank.
I took the rope, hung it on a nail & stretched it out tight, then tacked another nail at the bottom of the loop. This gave me a length of 47-1/2 inside the loop which I doubled to give me a 95 inch starting point.
I used my locally owned parts house to source the belt. Took 3 trips, but finally wound up with a 96.08 inch belt that gave the best tension & no noise. After a couple hundred miles, I've had no problems.
This past weekend I did some work on a friends 93 Taurus. I found that the tensioner's idler has the same bearing diameter & depth and is ribbed & shouldered like the Alt pully. I plan on using this if I develop belt throwing issues.
Hope this helps someone.
Initially, I tested alternate routing the original belt. By going "over" the fixed idler, under the tensioner, then around the Alt, then back to the crank. This actually worked. However, the Alt would squeal for few seconds when first cranked and when put under heavy electrical load.
Since I didn't care for that, I took a length of 3/8ths-7/16ths heavy nylon rope, routing the rope under the tensioner first (after it comes off the AC compressor) completely by-passing the upper idler, then looping the Alt before returning to the crank.
I took the rope, hung it on a nail & stretched it out tight, then tacked another nail at the bottom of the loop. This gave me a length of 47-1/2 inside the loop which I doubled to give me a 95 inch starting point.
I used my locally owned parts house to source the belt. Took 3 trips, but finally wound up with a 96.08 inch belt that gave the best tension & no noise. After a couple hundred miles, I've had no problems.
This past weekend I did some work on a friends 93 Taurus. I found that the tensioner's idler has the same bearing diameter & depth and is ribbed & shouldered like the Alt pully. I plan on using this if I develop belt throwing issues.
Hope this helps someone.
FTE Chapter Leader
Joined: May 2006
Posts: 12,317
Likes: 1,298
From: Central Mississippi
Notice how the top idler is completly by-passed. You can see metal idler on the tensioner.
I doubt it, but don't know. Does your 93 use a 3-bolt side mount Alt? Or does it have conventional through-the-ear face bolts?
I doubt it, but don't know. Does your 93 use a 3-bolt side mount Alt? Or does it have conventional through-the-ear face bolts?
New User
Joined: Feb 2011
Posts: 19
Likes: 1
can u send me the link of the pully ay Dsillyboxer@aol.com i gotta have a pully for where my smog pump was its a 95 f250 351w
Laughing Gas
Joined: Dec 2007
Posts: 959
Likes: 8
From: Imperial, MO
For anyone using the search function in the future:
Using the routing described by Scndsin above on a 5.0L, you will need a 94" belt (940K6). Hope that helps.
-Rod
Using the routing described by Scndsin above on a 5.0L, you will need a 94" belt (940K6). Hope that helps.
-Rod
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Senior User
Joined: Feb 2011
Posts: 137
Likes: 0
Scndsin says a 96.08" belt?, whitemax says 94"...
what manufacture did you go with? the goodyear gator back? nobody carries goodyear anymore everyone switched to Gates, supposed to be better i guess?
no problems with belt jumping?
what manufacture did you go with? the goodyear gator back? nobody carries goodyear anymore everyone switched to Gates, supposed to be better i guess?
no problems with belt jumping?
Laughing Gas
Joined: Dec 2007
Posts: 959
Likes: 8
From: Imperial, MO
Scndsin has a 5.8L, I have a 5.0L. Hence the difference in belt length. The routing you posted in red is correct. I'm running a cheap Autozone belt, with no belt jumping issues.
-Rod
Senior User
Joined: Feb 2011
Posts: 137
Likes: 0
got it! thank the both of you! i've a 5.8 so ill go with the 96"ish belt
Im gonna make a new thread with JUST that info and the pics, since i kinda thread jacked this one. JUST TO BE CLEAR the routing is the same both 5.0 and 5.8?
Im gonna make a new thread with JUST that info and the pics, since i kinda thread jacked this one. JUST TO BE CLEAR the routing is the same both 5.0 and 5.8?