The Central Hub for DSM Community and Information

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. This is where the DSM platform history is documented and archived. Log in to help us in our mission, and to remove most ads from the browsing experience.

Very Loud chatter from the Head, not lifter tick

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

JOLTY TacoMan

10+ Year Contributor
89
0
Jun 29, 2010
Floyds Knobs, Indiana
Last night I was driving and my head started making this awful noise that sounded like it would after bleeding all the lifters, it drove fine but I immediately pulled over and had it towed home. Just took the valve cover off and everything looks fine. Any clue what it could be?
 
I frequently forget to tighten my cam gears to spec and they raise hell and remind me. I know, potentially disastrous...
 
Oops, didn't notice the 2.4. You could still check and make sure everything is tight. Single cams have a cam gear too.
 
Belt stretch ...

So much slack in the belt that is causing free play between crank sprocket and cam sprocket ,esp on the free (left) side of the belt, making the two sprockets not run in absolute time.

Bet, if you threw a timing light on the crank pulley, the timing mark on the pulley is dancing around all over the place.

Bet if you replace the belt, that clatter goes away.

Good luck - DSM
 
Update.
Thought one of my lifters could have collapsed so I replaced all my lifters with 3g's, started the car and got the usual chatter. After the lifters filled everything sounded super smooth. Drove it around a full night and put maybe 25 miles on it. Then next morning I went to leave for work and would hear an intermittent chatter or scrape type noise. Then the frequency increased. Then suddenly it was back to non-stop loud chatter. Now the cars back at the house and I'm dumbfounded. I can make a video of the noise and post it up later.
 
Stock oil pressure gauge was reading fine, but that's not saying anything LOL. How would I go about testing this? I don't understand why it would run fine for a night, then gradually come back.

Also timing belt, timing belt tensioner, idler pulley, and balance shaft belt were all replaced around 10k ago.
 
Add Value - Be Respectful - No Trolling - No Misinformation - Participate Often!
Support Vendors who Support the DSM Community

Build Thread Updates

Latest Classifieds

Back
Top