Please help me diagnose this noise
Thread Starter
Launching!
Joined: Dec 2014
Posts: 235
Likes: 0
From: Leesburg, Virginia
Please help me diagnose this noise Guys,
I need some help here. I've done everything short of pulling the heads here and I cannot for the life of me find where this noise is coming from.
I'm thinking a lifter, but again I can pinpoint it with my stethoscope. I can pick up a hint of it through the header, but again, I can't pinpoint it. Since I can hear it out the exhaust, I thought for sure it was an exhaust leak, but I've pulled apart the whole exhaust, lubed hangers, replaced header gaskets, and even added arp studs. I pulled the whole exhaust system and you can even hear it open header. I'm at a loss here. It would be easier if I still had access to a lift, but where I live now I don't even have a garage.
Here are three videos, on the third you can clearly hear it when spark/fuel is killed.
I need some help here. I've done everything short of pulling the heads here and I cannot for the life of me find where this noise is coming from.
I'm thinking a lifter, but again I can pinpoint it with my stethoscope. I can pick up a hint of it through the header, but again, I can't pinpoint it. Since I can hear it out the exhaust, I thought for sure it was an exhaust leak, but I've pulled apart the whole exhaust, lubed hangers, replaced header gaskets, and even added arp studs. I pulled the whole exhaust system and you can even hear it open header. I'm at a loss here. It would be easier if I still had access to a lift, but where I live now I don't even have a garage.Here are three videos, on the third you can clearly hear it when spark/fuel is killed.
Thread Starter
Launching!
Joined: Dec 2014
Posts: 235
Likes: 0
From: Leesburg, Virginia
I have a feeling I'm just going to end up pulling the heads to be sure. I'd rather not considering the car is only 7 months old with 5000 miles. I guess it gives me an excuse to do more work while I'm in there.
Honestly, it just sounds like resonance from the valvetrain. What length pushrods are you running? maybe going just slightly longer would help cut it down some since you have an aftermarket cam. hard to really tell in videos.
Thread Starter
Launching!
Joined: Dec 2014
Posts: 235
Likes: 0
From: Leesburg, Virginia
7.4 IIRC. It made this noise after header install though. Cam install was later. Sound didn't change. It's more annoying than anything. All I hear is lope lope squeak squeak.
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Launching!
Joined: Dec 2014
Posts: 235
Likes: 0
From: Leesburg, Virginia
Well the heads are being sent off. I don't think it's the pushrod though because it was making the same noise when stock. I'm just confused as to what it could be rubbing on. No real wear on it other than the light markings. That's the only pushrod like it though. I'm going to check the stock ones when I get home.
Thread Starter
Launching!
Joined: Dec 2014
Posts: 235
Likes: 0
From: Leesburg, Virginia
They were completely black when new. I agree it is a weird spot. If the lifter was failing I would expect it to be higher than that on the pushrod. I honestly don't have a clue. I'm getting new pushrods, jesel sportsmans, and a solid roller from kip this week. Hopefully all quiet after that. All quiet other than a nasty lope that is...