Weird quick sound at startup.
Thread Starter
Junior Member
Joined: Aug 2025
Posts: 2
Likes: 2
Weird quick sound at startup.
Howdy All!
I just replaced the cats as of last week. Bought cut&weld Magnaflow OEM replacements - brought the whole cat assembly and new cats to a reputable muffler shop - reinstalled myself.
a weird sound has started to occur since the replacement on startup.
I’ll attach a video as opposed to trying to explain.
timing chains and phasers replaced 15k miles ago at 135,000. Timely oil changes, MC filters, etc.
thoughts?
I just replaced the cats as of last week. Bought cut&weld Magnaflow OEM replacements - brought the whole cat assembly and new cats to a reputable muffler shop - reinstalled myself.
a weird sound has started to occur since the replacement on startup.
I’ll attach a video as opposed to trying to explain.
timing chains and phasers replaced 15k miles ago at 135,000. Timely oil changes, MC filters, etc.
thoughts?
Junior Member
Joined: Aug 2018
Posts: 6
Likes: 1
From: Alabama
Sounds like the starter isn't disengaging from the ring gear properly on start up.
May just be just a coincidence and is unrelated ro the latest work efforts.
Suggest check If the starter is securely installed...listen down at the starter while someone starts it....remove starter & have your favorite shop evaluate it.
Compared to the $ of the cat's it should be an easy one.
May just be just a coincidence and is unrelated ro the latest work efforts.
Suggest check If the starter is securely installed...listen down at the starter while someone starts it....remove starter & have your favorite shop evaluate it.
Compared to the $ of the cat's it should be an easy one.
5 Year Member
Joined: Feb 2020
Posts: 7,714
Likes: 2,196
Howdy All!
I just replaced the cats as of last week. Bought cut&weld Magnaflow OEM replacements - brought the whole cat assembly and new cats to a reputable muffler shop - reinstalled myself.
a weird sound has started to occur since the replacement on startup.
I’ll attach a video as opposed to trying to explain.
timing chains and phasers replaced 15k miles ago at 135,000. Timely oil changes, MC filters, etc.
thoughts?
I just replaced the cats as of last week. Bought cut&weld Magnaflow OEM replacements - brought the whole cat assembly and new cats to a reputable muffler shop - reinstalled myself.
a weird sound has started to occur since the replacement on startup.
I’ll attach a video as opposed to trying to explain.
timing chains and phasers replaced 15k miles ago at 135,000. Timely oil changes, MC filters, etc.
thoughts?
Thread Starter
Junior Member
Joined: Aug 2025
Posts: 2
Likes: 2
just came back here to close the thread and saw your response. you were right on, but I was able to diagnose and resolve prior to your message.
Crawled under the truck and had someone start - sounded like starter wasn’t disengaging from ring gear. Went to pull starter and found the top mounting bolt was missing causing the starter to misalign. Threw a new starter in for good measure. Problem solved, ring gear teeth in good shape.
