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#1 |
Registered User
Join Date: Feb 2005
Location: Texas
Posts: 581
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truck smokes Help!!!
My truck smokes when it's running, I thought it was just maybe a carb issue (I am running a 750 AFB) or it just neens to be ran. I'm not sure, I donot have it taged right now and just drive it around my nieghborhod and land any Ideas?
I am in the process of rebuilding it and gathering parts right now.
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1972 Cheyenne 402 LWB 2005 Silverado X-Cab 5.3L 2004 John Deere L120 20HP B&S |
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#2 |
Registered User
Join Date: Jan 2007
Location: Denton, Texas
Posts: 356
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Re: truck smokes Help!!!
Putting in new valve seals may stop it.
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Andrew '69 C-20(292, 4-speed) Retired Daily Driver '64 C-10(250, 3-speed) Fixerupper '97 F*rd Mustang GT(4.6L, 5-speed) Daily Driver If I only wanted two pedals I'd have bought a bicycle.
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#4 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: truck smokes Help!!!
How old is the gas?
How old is the oil? How does it run? What color smoke is it, and how much? |
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#5 |
Registered User
Join Date: Feb 2005
Location: Texas
Posts: 581
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Re: truck smokes Help!!!
It runs really good, oil is two months old mobil 10w30, White and a little of it while at ittle and more when you hit the gas.
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1972 Cheyenne 402 LWB 2005 Silverado X-Cab 5.3L 2004 John Deere L120 20HP B&S |
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#6 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: truck smokes Help!!!
if you're only running it for a short time its probablly a combination of additives in the gas and moisture in the engine and exhaust system
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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#7 |
Registered User
Join Date: Feb 2005
Location: Texas
Posts: 581
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Re: truck smokes Help!!!
I run it for a short amount of time and park it. If I was going to start driving it on a regular basis would this stop or is there something I need to do?
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1972 Cheyenne 402 LWB 2005 Silverado X-Cab 5.3L 2004 John Deere L120 20HP B&S |
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#8 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: truck smokes Help!!!
Check the oil for coolant, it'd look like chocolate milk on the dip stick... also check the coolant for oil in it.
Although, I agree it may just need run a bit, get it up to op temp. |
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#9 |
Registered User
Join Date: Feb 2005
Location: Texas
Posts: 581
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Re: truck smokes Help!!!
no oil in the coolant and the dipstick is kinf of clear tented oil looking
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1972 Cheyenne 402 LWB 2005 Silverado X-Cab 5.3L 2004 John Deere L120 20HP B&S |
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#10 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: truck smokes Help!!!
I'd say drive it 10 miles, easy in town driving, get it up to temp, see if it goes away.
Idling in the yard probably won't do enough. |
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#11 |
Junior Member
Join Date: Dec 2001
Location: Bethel Park, PA USA
Posts: 127
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Re: truck smokes Help!!!
tell it to try the patch, or nicotine gum
![]() Sorry, I just had to!
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67 C-20 LWB 56 Nomad--- nope, sold it ![]() 75 Stingray 13 Silverado crew cab 08 Trailblazer (wife's) ![]() Pittsburgh, PA |
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#12 |
Registered User
Join Date: Aug 2006
Location: Bakersfield,CA
Posts: 7,893
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Re: truck smokes Help!!!
if its the original engine you should be running 20-50w oil and if its whiteish smoke it probly is the vavle stem seals, i had the same problem it would smoke a bit on start up and if i reved it so drive it around a bit get it up to temp maybe get on it a few times and clean/run it out then when you get back shut it down and let it sit a for a while then restart it and see what happens and for what its worth the valve stem seals arent hard to replace its just time consuming and you should take your time and do it right
goodluck
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-steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME |
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#13 |
Registered User
Join Date: Aug 2006
Location: Bakersfield,CA
Posts: 7,893
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Re: truck smokes Help!!!
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-steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME |
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#14 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: truck smokes Help!!!
low life, everything you just said goes against everything I have ever learned about oils in the whole time I have been turning wrenches. (my whole life)
Original engine should use 5/20 or 5/30 if under 20 degrees10W or 5/30 for 0 to 60 degrees, or 20w ,10/30, 10/40 or 20/40 from 20 degrees up to 100 degrees. In modern talk, 10/30 with it's new additives and the like, is more than fine. if it is real cold, like canadian cold, then a 5/30 is a good idea. Propoer additives are not only a good idea, but is the basis of a good oil. I'm not talkin adding lucas or some other crap on top of the oil, (unless we are talking about adding zink... which is almost manditory with new oils) I'm talkin the oil makers when blending the oils adding additives. I would NEVER recomend 7000 to 9000 on any mineral based oils without a lab test... only synthetics can do that. If conventional oils could do that, then synthetics would ge out of buisness. All this is a moot point anyways.... I've never seen OIL burn WHITE in an engine. I've seen fuel burn white, but it's normally diesel. |
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#15 |
Steel Horse Cowboy
Join Date: Oct 2006
Location: Tacoma, WA
Posts: 89
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Re: truck smokes Help!!!
Longhorn man has got it, I've worked on a lot of cars and I'll always tell ya, white smoke is coolant. Sometimes depending on the top cylinder lube I use it may burn white on initial start up, but I would guess that's not what your problem is.
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#16 | |
Registered User
Join Date: Dec 2006
Location: Rhode Island
Posts: 602
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Re: truck smokes Help!!!
Quote:
However if it smokes more when running than at idle or when decellerating, I'll bet it's a leaky head gasket. A compression test will generally confirm this or rule it out. If it were blue smoke though, I'd say the rings or the valve guides and/or seals are going or are gone.
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69 C-10 SWB Fleetside 454/TH400 (For Sale) http://67-72chevytrucks.com/vboard/c...ct=1299&cat=12 70 El Camino 454 TH700 29 Model A 4-DR Sedan Deluxe |
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#17 |
Senior Member
Join Date: Nov 2005
Location: northwestern wi
Posts: 2,111
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Re: truck smokes Help!!!
i would just run it and see if it clears up. i'd almost bet it's just condensation from ideling and short trips
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common sense isn't so common anymore |
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#18 | |
tiggerstoy
Join Date: Mar 2007
Location: camrose Alberta Canada
Posts: 416
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#19 |
Registered User
Join Date: Feb 2005
Location: Texas
Posts: 581
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Re: truck smokes Help!!!
Thank you guys for helping me out. I and a certified mechanic (friend of my Uncle's) rebuilt this engine in 99. It was really hard to find a set of closed chamber heads for a 396 at the time. I thought about going aluminum at the time but I didn't have the extra $$. The were som hair line cracks in the heads and I decided to keep the OEM heads and repair them. They went through a new valve job, Valve seats to accomidate the unleaded fuel, New everything, springs, rockers all Crane stuff I bought the best I could get at the time Steal stamped rocker. I invested $1200 just in the heads. But ate the time thats what it was and I wanted it done right.
THe block is 40 over and High dome pistons, chromoly rods and rings. THe crank was trashed so we had to find another crank, Fast bleed lifters and low end cam. I love this Truck Its true american hourse power monster. It may have 25,000 on the rebuild. I used to smoke 5.o mustangs in Huston all day and night. I just want to get it back and better than it ever was Thanks everybody on the board for all of your help
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1972 Cheyenne 402 LWB 2005 Silverado X-Cab 5.3L 2004 John Deere L120 20HP B&S |
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#20 | |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
|
Re: truck smokes Help!!!
it was not a direct atack, and you didn't say synthetic in there untill you midified it tonight at 7:58, it said something else.
My opinions are not based on ingnorence, but based on facts from oil labs... both federal oil labs, and the independant ones we use at work, and also the ones that 3 of our guys use on there race teams. (to include Danica Patric's team, my boss was in her pit crew last year, and on Sarah Fisher's this year) I didn't seperate my reply properly, the oil weight coment was actually refering to GREASEMONKEY72's post. While you never said the words, white smoke is oil, the question at hand is about white smoke, which, generally, has nothing to do with oil, so your thick oils, and burn proof oils, have othing to do with it. yes, in the 60's, they used single weight oils... that's becouse multi weight oils were new, and just starting to be realized. They also used external regulated charging systems, points, and biased ply tires. Not becouse they worked better back in the day, but becouse that was what we had, or the new stuff was untruseted by the general public. There was no personal attack, I don't do that. If there was a personal attack, i would have called you, and/or your statements, stupid or something. My opening statement was a simple, fact, that everything you just said goes against everything I have ever learned about oils in the whole time I have been turning wrenches. (my whole life) Of course, this was before you corrected your post and called this oil synthetic. Had it said synthetic, i would have only mentioned that oil of that thicknes was way too thick, and that i have seen lab tests show that oil this thick has shown upper valve train wear, and camshaft wear. (again, this is not just a guess) My professional opinion, is that you should NEVER dump in an oil of that thickness... synthetic or otherwise, unless you are limping your motor along instead of fixing/replacing it. Once you get to this point, you are on borrowed time. Sure, you can limp it with gear oil in the crank case, but that doesn't mean it's fixed. Quote:
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#21 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
|
Re: truck smokes Help!!!
silicone ... I was trying to remember ewhat it was you had called it.
Part of the problem was, I had never even heard of silicone oil. |
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