3.7 engine knock?
Thread Starter
Senior Member
Joined: Nov 2011
Posts: 207
Likes: 10
From: Los Angeles, CA
3.7 engine knock?
Hey guys asking for help with a knock-like noise the truck started developing recently. 3.7l 4x2 screw 140k. Noise started about 10k ago but has been getting more noticeable recently. Only occurs when in gear and at a full stop. Sounds like a knocking sound coming from behind the right side dashboard. If I let up of the brake, no gass, sounds dissipates away. Put the truck in park/neutral/reverse noise goes away. The only thing I noticed is that in drive it will idle at about 500rpm, but in park it sits at 6-700 rpm. Im a diy kind of guy but am completely stumped as to where to even start here.
Thanks
Thanks
Junior Member
Joined: Apr 2021
Posts: 6
Likes: 0
Did you find out what’s causing it
Hey guys asking for help with a knock-like noise the truck started developing recently. 3.7l 4x2 screw 140k. Noise started about 10k ago but has been getting more noticeable recently. Only occurs when in gear and at a full stop. Sounds like a knocking sound coming from behind the right side dashboard. If I let up of the brake, no gass, sounds dissipates away. Put the truck in park/neutral/reverse noise goes away. The only thing I noticed is that in drive it will idle at about 500rpm, but in park it sits at 6-700 rpm. Im a diy kind of guy but am completely stumped as to where to even start here.
Thanks
Thanks
Junior Member
Joined: Dec 2025
Posts: 1
Likes: 0
From: Dewitt Iowa
Curious if you ever were able to determine what was going on here. I have one doing the exact same thing. Slight tap when warm but seems to go away when I remove the serpentine belt. I replaced the water pump and idler and tap still exsist. Looking for any ideas