First start up, aweful noise

[strangebhavior]

Really hoped when seen this on boards was gonna have an answer with it. Mine is doing same thing. Sound doesnt have a rythm that follows the rpms. With mine started with low noise but was getting worse, but not bad. In fact i just put dynomat all over in car. Made my muffler growl quieter and thought what i was hearing was small exhaust leak. Couple days later my oil light blipped and the real noise started. Oil light just came on for like a second or 2 and went off, hasnt came back on either. Sound seems to be coming from under intake maybe. Not 1 side more than the other. Had car on jacks and been all over engine with a stethoscope. Cant tell at all where coming from. Same thing i did too. Removed all turbo where was just running open headers to eliminate all that. Removed valve covers also and didnt notice anything standing out. I put like 70000 miles right on the edge and already had 60000 on stock engine. Figured was sign time for an upgrade. Been picking up parts but hadnt tore it apart yet. Still fool with it every few days trying to figure it out though. Now about a year ago i had 1 side of timing chain arm broke to pieces and replaced complete timing set. Thing is car starts right up sounds good except for the loud noise like yours. Doesnt have miss at all. Might try to see if can upload a video also. Had couple car guy friends check out too and cant fig what sound it. Thought might have been lil butterfly valves on intake plate too. But removed all flappers butstill there. Need to hurry and order my shortblock though, just in case i find the problem. Easier to justify to wife a new engine the way it is now lol. Been like this a couple months. Thinking might be something internal. Lost a bearing or maybe a valve dropped or something. Working my way to front cover and valve cover removal i guess.

 

[strangebhavior]

Not trying to hijack post. Hoping you get answer or find problem. Cause think im in same boat. And post might trigger an idea.

 

[strangebhavior]

One other thing too. I read yours was sitting up a bit. But couple weeks before this happened gas mileage went to crap. Lost like 4 or 5 mpg.

 

[Totheboards]

@totheboards, i downloaded that app, then another to convert the video to mp3 to use on the previous one.

counted spikes at roughly 15 a second, seems to fast for a cam related issue

If the spikes are equal amplitudes, and assuming your idle is around 900 rpm, I would lean towards crank/rod/piston related issues. This is because 15 "clacks" per second works out to 900 per minute.

 

[Gabe]

well i finally got around to uploading the vid of the noise. god it sounds aweful...lol

https://www.youtube.com/watch?v=Dmb1MRcWi7I

Had one of the techs I used to work with listen to this, his response:

"It sounds almost like lifters that's a 4.6 right?
Change the oil and go for a long ride maybe the lifters start pumping.
After that if not, is better to change all lifters."

 

[Wes06]

Ugh so many possibilities. Annoying as hell

 

[eighty6gt]

Check the actual oil pressure, probably just above what would set the oil light or the gauge plummeting. The gauge is just an on/off.

Usually when this sort of noise is present it's a symptom of the cascading failure of the 3V oiling/vct system. The thing that took out autoxracer's engine the first time. Killed tons of 3V F150's. People put $1000's into the phasers, solenoids, etc... and then find out the bearings are toast, everything opened up, cam bearings are toast by then.

It's a bitch.

 

[sportinawoody]

it got my f150.

 

[Wes06]

I think at this point its time to just build my spare motor. Pull the stock one. And then when its running again, I can figure out exactly what went wrong

 

[skwerl]

Damn. I'm sorry, Wes. That sucks.

 

[Wes06]

yea i know, it could be something stupid simple, or could be on the verge of catastrophic meltdown, just to many things to guess at. Id rather say fuck it, buy rods/pistons and forge my spare block, get all the gaskets, seals, bolts, etc I need to assemble it, throw it in and THEN come back to WHATS making the noise

 

[Hotrodtinker]

That doesn't sound like a bad idea Wes. Can't wait to see your forged engine built up! Good luck!

 

[Wes06]

yea, someones trying to convince me to get a stroker crank, but hell they are $$.

Was always planning on just keeping the stock crank, especially nice since its cheaper, lol

 

[Hotrodtinker]

I like the idea of strokers but I've never had/driven one so can't give any advice either way. I know you've prob covered this somewhere else already but what are your plans for this bad boy?

 

[Wes06]

short term, safely run current setup at 450-500 without worrying about rods.

Longer term, up the boost, swap to a TVS and push 600 on gas, + more on race fuel since closest e-85 around is like 25 miles away, and dont like the feeling of driving that far for fuel, or having to get a 300gallon tank to fuel out of.

Basically keep the power under what is known the stock crank can handle, have a car I can still drive on the street, which 600 seems to be the limit of what can usually handle well, and pulley down and let it have at it on the track

 

[Hotrodtinker]

Excellent! Sounds like a great plan! I need to hurry up and get my butt to Oregon! I need to start modifying my girl!

 

[sportinawoody]

stock motor ? I thought you were built. well hell you know the rods are bad about micro stress cracks right under the pins. ive also seen a bent stock rod. get that shit outta there

 

[Wes06]

Hah nop, stock block ATM

That's why I didn't run the ported blower I got from Shep and traded it out. Didn't wanna chance it running TO well and causing....well this. Lol

Looking at eagle rods, diamond pistons, bunch of seals, gaskets and bolts, new timing guides/chains, billet oil pump in a '13 gt500 housing, and bearings. Think that's it

 

[Kylar]

Damn that sucks man, sad to hear. I would check the oil pressure with a real gauge from the engine block. It does sound like lifters(yes i know), doesnt sound like rod knock to me.

 

[Wes06]

So friend is convincing me towards stroker.

Scat forged crank, JE -14.3CC pistons, and manley rods

Should give mid 9's compression

And like i said at this point im losing desire to re-assemble it just to check this or that and at the point I'd rather pull it and find whats doing it later, lol