How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask OnlineHelp Your Own Question
OnlineHelp
OnlineHelp, Mechanic
Category: Car
Satisfied Customers: 3423
Experience:  Mechanic
9051600
Type Your Car Question Here...
OnlineHelp is online now
A new question is answered every 9 seconds

2007 DODGE NITRO 4.0 V-6 ENGINE KNOCKING NOISE

Customer Question

No Comment Added
Submitted: 8 years ago.
Category: Car
Expert:  OnlineHelp replied 8 years ago.

If it's a knocking noise it could be due to two different things. Low grade/bad fuel, if you run fuel that has not sufficent ocatne the engine will start knocking. You shoud try adding a octane booster. The other things is the lifter has gotten clogged, or the oil used is wrong density. You should run a motor flush and add proper oil, a good idea is lucas oil stabilzer. Lucas will retain much more of the oil helping the eninge run smoothly and without noise.

Customer: replied 8 years ago.
THE KNOCKING NOISE IS A NOISE THAT SOME R/T 4.0 V-6 DODGE NITRO'S HAVE,I'M NOT ALONE BUT THE FACTORY HAS NOT TOLD THE SERVICE DEPARTMENTS WHAT IT IS SO IT CAN BE REPAIRED. I BOUGHT THIS NEW AND HAVE BEEN TO TWO SERVICE DEPARTMENTS AND THEY LISTEN TO IT AND SCRATCH THERE HEADS. I HAVE BEEN A MECHANIC AND SERVICE MANAGER FOR OVER 30 YEARS,THEY THINK IF THEY TEAR INTO IT THEY WON'T FIND IT??

PAT
Expert:  OnlineHelp replied 8 years ago.

They will find it. This car is under warranty and this is not acceptable. Have them solve the problem. Let me check the lifter, i have a feeling the lifter that the car came with may have too small opening. Have them resolve the issue as i am sure you have pay big money for it.

Customer: replied 8 years ago.
NOBODY HAS GIVEN ME ANY INFORMATION I CAN USE YET.......THANKS ,PAT