Tensioner pulley knocking - Engine and Car Noises


	Auto Repair Home	SEARCH POSTS	WHO'S ONLINE	LOG IN

Automotive Repair

Car Troubleshooting Topics
  Car Troubleshooting
  Engine Troubleshooting
  Engine Fault Codes
  Electrical and Wiring
  Transmission Problems

Car Repair Topics
  Car Making Noises
  Car Stereo Repair
  Heating or AC Issues
  Motorcycles and ATVs
  Tricks of the Trade
  Truck Repair Advice

Site Options:
  Login
  Sign up here!

Latest Forum Post

Lukewarm Heat............

New antifreeze reverse flush heater core...

multiple warning lights

2013 GMC Terrain 130,000 miles 4 cylinde...

2014 Nissan Sentra Shaking

Car recently started shaking when accele...

Buy Flualprazolam Powder Online Whatsapp: +1(424) 328-1086

N/A

1989 toyota pickup 3.0 crank no start

I have a 1989 toyota pickup 3.0 crank no...

Strut spring orientation and strut mount tension nut

2017 Nissan rogue awd 2.5 L Put in Monro...

Transmission stuck in part, I have tried everything

So I'm working on my elderly fathers 201...

2017 dodge journey LED headlights on/off randomly

Year of vehicle 2017 Make of vehicle dod...

Kia Soul starter replacement issues!

Okay so my car is a 2010 Kia soul 2.0 en...

Please Help - Knock sound & engine fail

Hi all, Hoping to get some insight and ...

Tensioner pulley knocking

Sign up here!

Search for (search options)

Auto Repair Home>> Automotive Repair>> Engine and Car Noises

Harqwyn
New User

Jun 25, 2015, 4:44 PM

Post #1 of 3 (1830 views)

Tensioner pulley knocking	Sign In

Hi,

1998 Forrd Explorer Sport
2wd, 4.0L SOHC (vin E)
182,000 miles

Had to replace alternated two days ago. I went ahead and replaced the serpintine belt while i was at it and tried to charge the AC.

Everything worked fine until after I charged AC. Once the AC cycled on the tensioner pulley started knocking. Ended up replacing the tensioner and pulley.

Everything great for a day -took on freeway no problem. Today knocking sound is back though not as loud as before.

Noticed the gap on the top of the tensioner is reduced from what it had been after initial installation...

Oh and it only makes noise in drive or revers. Quiet in neutral and park.

Any idea what's up?

PS- I have not turned on AC since the initial test after charging it (still blew warm).

(This post was edited by Harqwyn on Jun 25, 2015, 4:48 PM)

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jun 25, 2015, 7:05 PM

Post #2 of 3 (1819 views)

Re: Tensioner pulley knocking	Sign In

Hard to say if this is the tensioner itself yet or from messing with A/C probably choking on too much refrigerant hydro locking or stressing out the compressor. Don't mess with A/C charge unless you know both pressures and all temps while systems are operating or send it out. Wild problems are common from DIYers messing with A/C charge.
Tensioner may be bad or belt could be bad even new? Does range of tensioner at least show it has room to adjust or maxed at one extreme or the other?

Try taking belt off and spin new tensioner if needed and test it's range with belt off and always make sure belt(s) are on exactly as intended,

T

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 26, 2015, 2:09 AM

Post #3 of 3 (1809 views)

Re: Tensioner pulley knocking	Sign In

I suspect your new belt is just a shade too long and now the tensioner is bouncing against it's stop.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

Search for (options) Privacy Sitemap