Name this 3800 tune.

[Larz01]

Well folks its been an on going battle; after the intial build I noticed there is a noise coming from the front of my engine, its like an overly loud injector. I recently resealed my headstuds because a few were seeping and checked the torque on the rocker bolts. The car is parked until the noise is resolved...havent driven it in a year, but want opinions on what it could be.

http://static.photobucket.com/playe...z01/video-2013-07-03-05-39-33_zps1a8fb533.mp4

Click to read more...

 

[boostedguy05]

just sounds like normal injectors.

 

[Turbocharged400sbc]

gah i think i hear what your talking about but talk about shitty sound

get a 4ft rubber hose and stethoscope that shit, check at the bellhousing inspection hole below the ECT sensor, if its in there its very likely a flexplate

listen with the valve cover cap removed, if you put two fronts on this makes shit easy

get a timing light and see if the noise syncs with valvetrain/ign rpm or at double that at crank rpm

 

[Turbocharged400sbc]

with a two channel lab scope, mic and iductive pickup you could figure it out quickly...my route is sorta a hillbilly workaround to narrow down noisy components


ps pull the belts next time, makes it quieter/safer to listen around

 

[Larz01]

My injectors are quieter than this ticking/tapping, so its not them. A good friend stopped by that deals with alot of 3800 parts, said it didnt hear like a bearing from the engines he had heard that were bad. I hope not! I plan on tearing the front valve cover off this weekend and resetting the torque on the rockers. I was told to go to 30 ft/lbs, zzp recommends 23 & intense 25. Possible this has something to do with it. The little time I drove it there wasn't any electronic knock present and pulls very hard, when i was dialing in the afr last year; I will pull the belts and probe around. I hope its an easy fix. I did replace the trans and put new tty flexplate bolts on with loctite, so I'd like to rule that out. Sounds like its motor related.

 

[Turbocharged400sbc]

for the 5/16 thread rocker bolts I go to 28 to 29 foot pounds and have never had a problem never using Loctite are you referring to Loctite on the crank to flex plate bolts or flex plate to converter bolts?

use the rubber vacuum line trick on the coil terminals to to figure out which cylinder might be contributing if it is a firing related noise

 

[Larz01]

New tty bolts on flexplate to crank with loctite, flexplate to converter reused old bolts with loctite.

 

[slowchevy]

what's the tube going into the oil cap?

 

[1quick]

i cant see his video at work but tube coming off the oil cap is normally a catch can

 

[Turbocharged400sbc]

this 3800 tune sounds sorta like the death march with a bit of a banjo twang



did i get it right?

 

[Larz01]

@^ yes, it doesnt sound good. Its pretty audible on cold start up like in the video, but will queit down some once operating temperature is reached. Line to the front is my fresh air side of the pcv, since mine is blocked, running a catch can setup on the rear.

 

[Turbocharged400sbc]

and you've confirmed its not bearing wear by pulling the filter and dumping it into a clean pan and look at it in the Sun for shimmering of metal particles?
go ahead and use a timing light to see if the noise is at spark/crank rpm or half that or less frequency would be valvetrain related

I just want to make sure that your oil doesn't have clitter glitter

 

[Larz01]

No glitter in the oil, looks like new. Had a second opinion. Started it up and no noise really. We took the front valve cover off pulled the rockers and inspected pushrods, and put a little cleaner down to the lifters. He said its more than likely a sticky lifter, and I should drive. Shouldnt have any worries. about it. Insurance will go on Monday. If something does granade, higher compression will be in my sights.

 

[Turbocharged400sbc]

the TR clatters like a 900,000 mile detroit diesel

your fine

 

[1quick]

So does my turd, 3800's love them some 150lb valve springs I just made the exhaust loud enough to drown out the clatter

 

[Larz01]

Haha. I must be paranoid! Well its my first "build" ever that I have done myself. And after learning a great deal I must say it has been a fun learning experience. My 3800 will probably chatter as well since all the valvetrain is upgraded for a sissy little 1.9 rockered car.