Smoke coming from both valve cover breathers

[77bronco77]

So i just rebuilt my old tire 302 and i put some cobra valve covers on it, from front of motor the left side has a filter breather on it and the right side has a stick in breather (not sure exact term here) but when i start it and run it theres been smoke coming from both of them. i know there the crank case ventilation but could it be just burning off all the assembly **** and such? ive prolly only ran it 5 hours total on the new build...and it stops sometimes but will come back everynow and then...just curious. it doesnt really concern me but since the fenders and grill arnt on my rig at the monment i feel like an a$$ when i roll up to a stop light and the whole motor bay is smokin...doesnt really bother me but im very curious. i wanna make sure nothing vital is very wrong....

Thanks

77B

 

[Mike G]

Sounds like your PVC valve might not be working or missing from your description of the things mounted to both valve covers.

Sure a new motor will burn some oil until everything finds its new home. But the PVC valve uses vacuum off of the intake manifold or air cleaner to keep a negative pressure (or a way to vent the positive pressure from the crack case) on the crack case and to **** the blow by (thats what you are seeing causing the smoke) into the intake manifold to re burn it. Never did figure out why they call it a positive crack case ventilation. Maybe because it makes the outside atmosphere positive.

Like I said before once the rings get seated properly after the break in period the blow by should all but stop. But check your connection to your PVC valve to your vacuum port on the intake manifold.

 

[77bronco77]

ya the pvc valve got eliminated....i didnt really think it wasa huge nesessity when i put the vavle covers on. ive been thinking about running them both to my air cleaner so it can re burn everything. would i notice a difference or do you think i should re routa a pvc valve? thansk

 

[Bully Bob]

" ....but since the fenders and grill arnt on my rig at the monment i feel like an a$$ when i roll up to a stop light and the whole motor bay is smokin."

How do you get away with this...? :lol:

"..do you think i should re routa a pvc valve?"

YES...!

Did you do the break-in proceedure to set the rings.., & break-in the cam...??

i.e. run the eng. @ (X)RPM for (X) min. ..?? /emoticons/[email protected] 2x" width="20" height="20" />

 

[77bronco77]

" ....but since the fenders and grill arnt on my rig at the monment i feel like an a$$ when i roll up to a stop light and the whole motor bay is smokin."How do you get away with this...? :lol:

"..do you think i should re routa a pvc valve?"

YES...!

Did you do the break-in proceedure to set the rings.., & break-in the cam...??

i.e. run the eng. @ (X)RPM for (X) min. ..?? /emoticons/[email protected] 2x" width="20" height="20" />

i am not sure on how im gettin away with out fenders or a grill. cops look at it but then just look away. :lol: i did mount some offroad lights onthe bumper so it has lights. kinda. there not hooked up but they are there!

will it by chance run any better with the pvc valve? i heard it was a completion of a vacumn system..not sure if its true or not...

and yes i did break the motor in before i even moved it outta the garage. i used rotella T oil like the comp cams break in guide says to B)

 

[Bully Bob]

"....will it by chance run any better with the pvc valve?..."

More likely than not.... question would be ..., is it NOT runn'n good now..?

PCV valve, proper timing for your area, & carb. settings should make a smooth runn'n eng..!!

Depending on fuel qual..., I sometimes block off the vac advance & get smoother operation.. /emoticons/[email protected] 2x" width="20" height="20" /> B)

"..and yes i did break the motor in before i even moved it outta the garage. i used rotella T oil like the comp cams break in guide says to.."

Good job..! >

 

[77bronco77]

"....will it by chance run any better with the pvc valve?..."More likely than not.... question would be ..., is it NOT runn'n good now..?

PCV valve, proper timing for your area, & carb. settings should make a smooth runn'n eng..!!

Depending on fuel qual..., I sometimes block off the vac advance & get smoother operation.. /emoticons/[email protected] 2x" width="20" height="20" /> B)

"..and yes i did break the motor in before i even moved it outta the garage. i used rotella T oil like the comp cams break in guide says to.."

Good job..! >

hmmm i think its runnin a bit rich actually. when i go to take off sometimes i gota let off the gas, apply a litle gas then work it up some more. most the time i give it to much gas i guess, prolly bout a quarter petal and it tries to die almost, bogs a lil, then slowly come back and gets up to speed. not sure if im right or not but wouldnt this mean its runnin a tad rich? kinda floodin it out when i give it gas?

thanks

 

[Bully Bob]

".....but wouldnt this mean its runnin a tad rich? kinda floodin it out when i give it gas?.."

Not necessarily....timing and/or a bad accel. pump would be more likely...i.e. starving for fuel... /emoticons/[email protected] 2x" width="20" height="20" />

 

[77bronco77]

".....but wouldnt this mean its runnin a tad rich? kinda floodin it out when i give it gas?.."
Not necessarily....timing and/or a bad accel. pump would be more likely...i.e. starving for fuel... /emoticons/[email protected] 2x" width="20" height="20" />

im almost sure its the timing....man im sorry about all the questions but i heard that white "steam" or smoke from the exhaust could be bad head gaskets but i cheaked the head gaskets (running truck for 1 min then cheaking colling system for pressure) but white smoke could also mean its running lean right? i only notice it after i **** it then start it again soon after when its already hot i suppose...thanks for youjr help

 

[Mike G]

Do you have any white slug looking stuff on the dip stick. If the head gasket is bad and water is getting into the crack case it will make that white slug. Also did you get the PVC valve fixed?

And was it white smoke or steam coming from the valve cover breathers?

 

[Bully Bob]

im almost sure its the timing....man im sorry about all the questions but i heard that white "steam" or smoke from the exhaust could be bad head gaskets but i cheaked the head gaskets (running truck for 1 min then cheaking colling system for pressure) but white smoke could also mean its running lean right? i only notice it after i **** it then start it again soon after when its already hot i suppose...thanks for youjr help

White smoke is moisture (steam)..not lean. Lean doesn't give telltail signs at the exh. pipe.

(Shouldn't be any smoke.)

Dark smoke is rich.

 

[77bronco77]

Do you have any white slug looking stuff on the dip stick. If the head gasket is bad and water is getting into the crack case it will make that white slug. Also did you get the PVC valve fixed?
And was it white smoke or steam coming from the valve cover breathers?

havent fixed that pvc valve yet. but the white smoke is only coming from (if you were standing in front of the truck) the right side...standing from back of the truck its coming out of the left pipe only...i dont see any white sludgey stuff on the dip stick. and its white smoke coming from the breathers. it hasnt been doing it lately though, maybe its finally broken in? in most cases for me when something fixs itself something else goes wrong way worse...

 

[Bully Bob]

Where the heck are you...?

If you were close by..., I'd come fix this rig for ya...!!

Fill in your info. page..., "signature"..., etc.

Maybe there's someone close by that can help.........? B)

 

[77bronco77]

Where the heck are you...?If you were close by..., I'd come fix this rig for ya...!!

Fill in your info. page..., "signature"..., etc.

Maybe there's someone close by that can help.........? B)

im in fort collins, colorado zip code 80525. that would be great but i dont think anyone is out this way. i still havent figured out the problem as to why it almost dies every time you get on the gas a lil bit from the stop light. its got less power than a geo metro takin off from a stop light because it almost always tries to die. and i know this things got more balls than its showin me. any help or anything would be great! just to throw out there. the timings on the spot and the carbs decently tuned in. could use a lil more messin with. its a holley truck avenger 650cfm. with the eddie performer intake. i need to re gear it. 33" tires (very cheap **** cepek mud country 2s that i got from someone for $40 a tire/wheel with good tread.) and its got the stock gears in it. its a 77. not sure what else you guys would wanna know. ask questions though please. i need to figure this out. oh ya. and it doesnt do anybetter when its warmed up or anytihng...im just stumped

 

[Bully Bob]

"..the timings on the spot"

what spot is that....?

Launch problems; As I said earlier;

bad accel. pump would be more likely...i.e. starving for fuel...

 

[BroncoJoe19]

Hi guys,

Just pokin my nose in here...

Bully Bob is right, the delay in accelleration is most likely due to a bad accellerator pump inside the carburetor. Turn the engine off, pull off the carb cover, and look down the carb throat. Depress the accellerator. One should see a nice little stream of fuel get pumped into the carb, if not the pump is bad.

Another thing to check is that the vacuum advance is working for your ignition timing.

Hey Bully, I'm in NJ... Is that close enough for you to come work on my truck?

 

[Bully Bob]

"Hey Bully, I'm in NJ... Is that close enough for you to come work on my truck?"

You bett'cha ...be right there.....!

 

[77bronco77]

"Hey Bully, I'm in NJ... Is that close enough for you to come work on my truck?"
You bett'cha ...be right there.....!

alright ill take a look at the accel pump. the timing is just at 0 no ****** no advance. the vaccum advance last time i cheaked was working properly. it runs like crap without it on so i go figure that its doing what it needs to be doin.

 

[Bully Bob]

"... I'll take a look at the accel pump"

Accel pump would be my 1st. guess...should be fuel squirt'n fr. nozzle(s) with eng. off (look down the airhorn to see this) (move throttle by hand)

2nd. --There was a sticker, under the hood, with the correct advance/timing deg. (not sure if it's "0") (my old book says 4deg., 6deg., & 12 deg. BTDC for a '77 302..?)

Someone with a '75-'77 EB (Ford electronic ignition) can tell you.

.044 gap on plugs.