What you have circled is not a tensioner. It is an idler pulley.
Thanks for such a fast and detailed replyWhat you have circled is not a tensioner. It is an idler pulley.
Yes, these can run without it. I drove mine for 25K miles before I realized it was missing from the PO.
You have cogged belts on there and that idler will make them howl. OEM belts are NOT cogged and do not howl due to that idler.
The adjuster is entirely in front of the alternator.
Tools you need:
3/8" Dr. Breaker bar
3/8" Dr. Ratchet
3/8" x 3" extension
14mm socket, 3/8" Dr, 6 point, standard or deep well.
12mm combination wrench
12mm combination ratchet wrench with standard 15° on box end (not straight-flat)
With that set of tools, the most important one is the last one. I set mine "backwards" and use it from in front of the radiator with my right hand down by the PS pump and hook the ratchet on the adjuster bolt. I must do it completely by feel, and you must drive the tensioner bolt almost the entire length of it's throw from fully tensioned to loose enough to pull the belts.
When these are properly tensioned, they are VERY tight.
OEM belts are cheap!As a mechanic of 20 years Im embarassed to say that you just pointed something out to me that answers a riddle ive been having lately. After completely baselining my frontal area of truck ive had an annoying hum. Sure enough I replaced my belts with cogged and it never occurred to me till your post. That is 100% the noise Im hearing.
Ive been wondering if it was my power steering pump gear from when I rebuilt the pump.
I bought a tensioner and installed it because I figured Mr. T engineers did it for a reason that is beyond my comprehension. I think it also reduces belt slap under deceleration.Have a partsouq order half way here now, should have put them in the order
Perhaps ill go with the new plan and lighten my rig by removing idler.
I bought a tensioner and installed it because I figured Mr. T engineers did it for a reason that is beyond my comprehension. I think it also reduces belt slap under deceleration.
My PO left off a lot of stuff under the hood.
Alternator belt adjuster bracket
Spark Plug loom cover (referred to as head cover one and two I believe)