PROBLEM, no problem? whats up...

[lonniejr]

hey guys i live in montana, lately it's been getting descently cold. in the morning i'll go outside and start my truck, when i do it knocks fairly bad, but only first start on a cold morning. don't know if rod or what, but goes away within seconds, or if i touch gas. also regardless of temperature of engine or outside or anything if i rev the engine to 3 grand or UP in gear or nuetral or anything i here a knock, can't tell where it's from but it is not even slightly there at any lower rpms then 2800 EVER. so whats the deal suggestions? could it be a lifter knock? how do i fix? could it be a rock knock? doesn't seem like it? i know it's not just a leak. what ever you think it is what should i do to diagnose without tearing whole engine apart, oh and my engine has seemed louder for couple months now? whats that about? maybe it's just my imagination though. oh forgot to mention few more things, 1. it's an 84 s10 2.8L v6 carbureted. 2. my engine sounds rapped the gauge says 3000 rpms but... at 2800 it seems not even close? anywho thanks for help guys. oh also i havn't noticed a slip or lack in power or torque at all thanks.

[Tink]

Could be a lifter tick... you can narrow down where the noise is coming from by using a long screw driver and placing it on the engine while running with your ear to the end - like on the valve cover for a lifter tick.

BTW, I've found on our 83 that the factory tach is way off...

[neo71665]

IT only does it when its cold, like what degrees?

What weight oil you have in it?

[Junksterr]

.... Motor Mount?

[lonniejr]

i use 10w-30 Pennzoil, and i does it warm and cold doesn't make a difference? what do you mean with the screw driver thing? or was that sarcastic?

[lonniejr]

oh and it's not factory tach, i have an aftermarket one, can't recall what it is at the moment, nothing fancy or expensive though.

[csl2006]

have you checked the exhaust components? none loose or anything? Just a wild thought from vibrations if a hanger is loose or something.

[neo71665]

no, you take the tip of a screwdriver and put it on various parts of the engine, put the handle up to your ear and listen. It might sound like BS but its an old mechanics trick. Acts like a stethoscope (sp) like nurses and doctors use.

Tink doesn't joke around very much like the rest of us and if she offers a suggestion its pretty much true.

[dave1182]

no, you take the tip of a screwdriver and put it on various parts of the engine, put the handle up to your ear and listen. It might sound like BS but its an old mechanics trick. Acts like a stethoscope (sp) like nurses and doctors use.

Tink doesn't joke around very much like the rest of us and if she offers a suggestion its pretty much true.
You can use a Long screwdriver, wooden broom handle cut down, its a Poor man stesthscope. and yes it does work. You put the tip of the driver or wooden handle, on the object and put your ear or that little patch of skin just infront of your hear and you will hear everything. trust us, Neo is a professional..

[Big Mack Daddy]

Also works with a piece of hose.

[lonniejr]

oh ok sweet thanks guys. ya theres nothing loose, exhaust is tight and everything else i already checked everything to make sure it's not a rattle. oh my tach is a super pro

[neo71665]

Neo is a professional screwup.


Fixed it for ya

[lonniejr]

hey guys someone lent me a stethoscope, and i couldn't find a source, all i found was a VERY slight knock in from valve cover and you can't hear it without the scope. also whatever knock i heard before is gone. so i'm assuming it was a lifter and it went away.

[neo71665]

or a loose rocker arm

[Junksterr]

pull the valve covers and check everything for tightness... Just a suggestion

[Jay-Sliver]

If you have a lifter that collapsed, or is going bad...it may sound like a Knock. Best thing I think you can do is get a good quality Video, or sound clip of the noise. Go out, turn the camera on, sit it about 3 feet from the front bumper on the ground...fire the truck up, let us hear the noise. If its a main, it will KNOCK for a few seconds till it receives oil pressure. If its a Rod, it will be a rapid tick to knock sound..if its a lifter.... I could go on...

Jay

[lonniejr]

ok i'll try that, oh new update, the knock is now back again but not it knocks at like 2k rpms.. instead of 3k and it's even louder. if it was a collapsed lifter wouldn't i lose some power? or atleast here it at idle?

[Junksterr]

Now Im going rod or main, it just hasnt completely lost it yet. Just by what you are saying.

Maybe you cant hear it over the sound of the engine running but when you rev it, it becomes more noticable A) because the motor is turning more rpms and B) because the bearing is not completely worn to where it slaps the piss out of the crank yet.

I have had a motor do this.

Just my 2 c3nts

[Jay-Sliver]

Now Im going rod or main, it just hasnt completely lost it yet. Just by what you are saying.



X2.

Do you have an oil pressure gauge in your truck? What is your pressure?
Pull your dipstick out, and whipe it on a clean White piece of paper..hold it in the sun, and see if you can see any shiny's in it. If so, your main or rod bearing speculation is becoming more of a reality.

Jay

[lonniejr]

tomorrow i'm going to pull the valve covers off, to try adjusting the rockers. anything i should look for? check ect. while there off to see if it's from up there? or anyways i can tell which cyl it's coming from before adjusting?

[offroadfirstgen]

i have a similar problem not right now but when it gets a little cooler i will

(had the problem then put normal weight oil in and it disapeared for now)

had it last winter too still going though

my knock lastd 5 seconds or so at idle or aprox 1 min at 2k (probably jjust couldnt here it over the fan at idle) (guage in the dash shows normal pressure)

so many leaks (oil pan antifreze disapears only when i top it up to the full line) and rattles (part exhaust leak part gear rattle) vibrations (unknown cant seem to figure it out but i figure its out of balence driveshaft) whining sounds (1st and 2nd gear whine) spedometer not working after 10min of highway drive fasten seatbelt light flashing ocasionaly wile driving (even though im wearing it) springs worn out (T bars adjusted up as high as it will go and it looks lower than stock) body ready to fall apart. if i leave the radio on for 5 mins it barly starts


but just keeps going and offroading pretty good too tried to go through a puddle with ruts in reverce and didnt work but clicked in 4/4 and did the old side to side turns wile spinnin the tires and pulled myself out ill have to grab a camera next time i go out offroadin with bald tires is fun


and it parks everyday b side a brand new lifted ranger
sorry kinda got off topic

[lonniejr]

awesome note, i fixed the problem it was a loose rocker, well 5 actually :eek: the nuts on them went bad so i replaced them today and the knock is COMPLTELY gone. so thank you all for your help i really appreciated it guys. now then what do you guy's think the best timing for my rig is? the plug gap is .045 and the timing is 0 or whatever. are those really the best? or is something else? thank you:D

[neo71665]

10+ is whats suggested

[lonniejr]

10+ is suggested for what? if timing do i need to change ploug gap?

[BigTruckDrivah]

10+ degrees on your timing. I dont know what the total degrees that would be but set your light to 10 or above. I think stock is 8, but a little more wont hurt.



Im surprised John didnt come in here and say "throw some 20 50w in that bish", lol

[neo71665]

10 degrees advanced or 10+ is what the factory setting on a 2.8 is. I can't recall exactly but thats on either 40 or 45 gap.