1995 Chevrolet Blazer Loud knock

1995 CHEVROLET BLAZER
4.3L • V6 • 4WD • AUTOMATIC
Avatar
STEFANLOBNITZ
  • MEMBER
  • 3 POSTS
I have a jeep wrangle that I put a 4.3 vortec v6 from Chevy and it has a painless wiring harness the problem is a loud knock that seems to come from bottom of engine near transmission an the knock goes away a lot when I increase Rpm's. I wanted to know if it could be a sensor or worse? Please help
Mar 1, 2014 at 8:47 AM
Avatar
TY ANDERSON
  • ✓Experienced Mechanic
  • 719 POSTS
Knocking in any engine is really bad. Check the engine oil level. Isolating these noise are difficult. If you can start the engine if you disconnect the torque converter or clutch you can rule out the trans from the engine. If the noise is still there then your knockin is with your engine. If you don't hear the noise check the flexplate for cracking & then transmission. Start hear and get back to me.
Mar 1, 2014 at 9:17 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle