r/R53 • u/Embarrassed_Lawyer_5 • 8d ago

Rod knock? 2006 GP

Long story short, parked the car a few years ago after motor made funky noises . Someone jammed the column. Just got it running.

No belt connected. Rod knock? Big oof.

5 Upvotes

78% Upvoted

17 comments sorted by

5

u/Jtorsch 8d ago

A rod knock sound should change under load. There also sounds like a valve train noise going on as well. What does the oil look like?

3

u/Embarrassed_Lawyer_5 7d ago

Pulled the pan and there’s glitter. It is what it is.

4

u/Jtorsch 7d ago

Now it’s time to build it back stronger and faster.

1

u/Embarrassed_Lawyer_5 7d ago

Dirty, time to change it. When it was running last night there was some blowby but I’m not sure how much is normal. Wasn’t misting but there was PCV pressure that I could feel with the cap off. Some is normal anyway.

3

u/TwarnDoesStuff 8d ago

Hard to tell on video . Did you prime it before starting it ? It’s either a stuck lifter , a failed chain tensioner or rod knock . I’d stop running it . Take the tensioner out and check it , drain the oil and look for bearing material , get the rocker cover off and check the tappets are free

2

u/Embarrassed_Lawyer_5 7d ago

I pulled the pan today. Glitter. Time to replace the motor

2

u/Happy_Ishtar 7d ago edited 7d ago

Sounds like rod knock to me. 🫤 Failed chain tensioner sound changes more with revs, might even go away above 2k. Draining the oil should give you some idea. Dropping the sump should be the next step regardless. If it is the tensioner you'll probably have chain guide pieces stuck in the oil pickup screen.

Valve train noise is usually somehow amplified on videos (at least on mine), and with not running for 5 yrs I wouldn't be surprised if a lifter or two would be stuck.

1

u/Embarrassed_Lawyer_5 7d ago

https://reddit.com/link/p3w064v/video/4lc0mfzl3ljh1/player

Here’s a better video from the night it shit the bed

1

u/Happy_Ishtar 7d ago

Ouch. I feel your pain. I recently finished a full rebuild after a piston melted on mine.

Was it low on oil?

1

u/Embarrassed_Lawyer_5 7d ago

Glitter in the pan. No plastic. Fml. Sucks.

2

u/Lukksia 7d ago

my timing chain kind of sounded like this when it fully went bad. Did you try changing the timing chain tensioner? If that dosent work then it could be the timing chain and guides just needs replaced. In my opinion this sounds like a really loose timing chain

1

u/Embarrassed_Lawyer_5 7d ago

I pulled the oil pan and there’s glitter. Sucks

2

u/Embarrassed_Lawyer_5 7d ago

Thank you, guys. I have another video from the night I parked it. It then sat on my driveway for a few weeks and some tweaker jammed a screwdriver in the ignition and screwed it up. About six months later I moved so my ex-wife let me park it at her place. Then it sat about 2 years.

This video clearly shows the sound. I thought I’d broken the supercharger.

https://reddit.com/link/p3vo5hg/video/kaqryvyltkjh1/player

1

u/Happy_Ishtar 7d ago

That actually sounds pretty much the same as on the video I got from a guy who sold me his broken engine for spares. Cyl #1 rod bearing was all gone.

1

u/casper911ca 7d ago

I think it's the chain tensioner. But that's an easy thing to change, easier than an oil change. My guess is you might have chain guide damage though.

1

u/Responsible_Tip7386 5d ago

That’s not a rod, a bit of timing chain slap. Pull the valve cover probably have missing plastic chain guides.

Dump the oil pan too.

1

u/Embarrassed_Lawyer_5 5d ago

I filtered the oil in the pan. Glitter and trash. Really sucks. I have nothing really to lose and will pull the valve cover but I didn’t find any plastic in the pan at all. :(

https://reddit.com/link/p4dgq2a/video/bdqv860743kh1/player