greg1990964

I started the car after a week of sitting, Its mid 20's outside. It sounded fine at startup and immediately went inside for 5 min. This is the racket I came back to. Running on like 5 cyl. Any ideas? I will put it up on my lift and drop a valve cover and look. Just curious if it sounds familiar. Side note, started it a week ago after a month of sitting and had some valve tick from that pass side that went away as it heated up, and drove fine and quiet for 2 hours.

Video

JohnK964

I had 4 broken head bolts on my car 2 on the same cylinder and it didn't sound any thing like that

FeralComprehension

Oof, sorry.. Don't stress too much if you can avoid it; just get in there and see what there is to see. Check the oil for metal, take off the VC, etc...

JohnK964

I agree maybe a valve adj screw worked loose

bpu699

I wouldn't be running that motor any more until you look at the valves...

Good luck!

txhokie4life

I had something similar happen on my race car. The valve adjust screw nut backed off and that valve was very loose.

found the nut stuck to my magnetic drain plug and opened up VC, put it back on, adjusted valve, checked others and she was fine after that.

mike

greg1990964

Thanks boys boys, made my night even though it would be a miracle if that was the case.
I will get filthy this weekend and have a gander.

hockenheimr

That doesn't sound like a broken stud.

dhc905

Yikes. Hope it's something easy, but sure does sound awful...

J richard

Look for a blown out spark plug

greg1990964

Keep the opinions coming...

prschmn

Owww. Shouldn't be hard to find once you look. Curious what weight oil you're running.
If say 20/50 it really isn't wise to even start the car at such low temps-best leave it till spring.
Though that advice comes a bit late-sorry.

Gus

Had something similar - think "txhokie4life" is on right track. I had the tip of the valve adjustment screw break off. This left a large gap between rocker arm and valve head make a strange sound like this. Found broken tip resting in channel in cam carrier. I just replaced rocker arm in car. Was easy fix - hope yours is the same or easier.

dlpalumbo

i once chased what i was sure was a ticking valve. Turned out to be loose plug. this was on a different car, but same ticking noise. plug was in PITA location and I just hadn't torqued it down properly.

porsche mania

I had a rocker shafts work it's way partially out and it sounded very much like that!