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#1 |
Beer Drink'n Knuckle Dragger
Join Date: Mar 2010
Location: Eatonville, WA
Posts: 493
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White Smoke coming out Right Bank...Need some help Please!
Ok...so I knew I had a problem with smoke before, but now that I got the truck lifted, I wanna drive it, but don't wanna hurt it, so I'm trying to diagnose what's going on.
Specs...350 sbc (long water pump), hypertech dizzy, new plugs and wires, new valve cover gaskets, sm420, weiand intake, Holley 4barrel, hooker headers with true duals. I start the truck and within a minute or two, the right header is noticeably hotter than the left, and the right muffler is smoking, but the left one isn't. I sprayed around the intake manifold with carb and seafoam, no spike in rpm. fuel pressure is reading steady at 3psi at idle. I'm kind of stuck. I don't know if it's a head gasket or not. Haven't noticed any leak in the coolant, resevoir still at the fill line, and the thermostat reads around 190 warmed up. But smokes like a pig out the right exhaust pipe. not using oil, and i freshly changed the oil 2 weeks ago. Pulled the dipstick and it's still super clean. Haven't used any additives other than a seafoam treatment a couple of months ago. Since then i've drained the fuel tank flushed the lines and am using new gas. I adjusted the float bowl fuel level on my holley today cause it was flooding out the carb, but i don't know why just one bank is smoking and the other is fine. or why the right side gets hotter than the left. I started pulling plug wires and cranking over the motor to see if i could isolate a cylinder but smokes with each one of the plugs off. (i pulled starting with #2 cylinder plug cranked, plugged it back in and then did the rest on the right bank the same way) Can anyone guide me in the right direction. thanks, Jack
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#2 |
Registered User
Join Date: Oct 2010
Location: mt vernon, oh
Posts: 867
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Re: White Smoke coming out Right Bank...Need some help Please!
sounds like it may be actually running lean on the smoke side, check how the carb feeds the intakes, maybe one side stopped up?
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#3 |
Beer Drink'n Knuckle Dragger
Join Date: Mar 2010
Location: Eatonville, WA
Posts: 493
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Re: White Smoke coming out Right Bank...Need some help Please!
Haven't done a whole lot of carb work...so what's the best way to check for this...just pull the air cleaner and look down its throat?
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#4 |
*** That's interesting ***
Join Date: Oct 2008
Location: Pittsburgh, PA
Posts: 2,772
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Re: White Smoke coming out Right Bank...Need some help Please!
3psi fuel pressure at idle sounds low for a Holley 4bbl carb. I agree with the lean condition. Keep searching in that direction.......... I suggest you get the fuel pressure up to 5psi. Mine sits solid at 6.5 psi at idle.
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Tom ![]() Chevy by day... 1969 Chevy C30 Rollback Tow Truck -- 383 stroker, 4L80E 2011 Chevy Caprice PPV 9C3 6.0L 1995 Chevy Caprice 9C1 1994 Chevy Caprice 9C1 #3 1995 Chevy Caprice Wagon #2 1995 Chevy Impala SS Mopar by night... 1969 Dodge Charger 1972 Chrysler Newport 2dr Hardtop (27K miles) Plus others... |
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#5 |
Active Member
![]() Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: White Smoke coming out Right Bank...Need some help Please!
More than likely if it's whitish smoke it's coolant. It may be a small head gasket leak, intake gasket leak or worse a cracked head. The antifreeze in the coolant makes a lot of smoke so keep monitoring the fluid level.
I have also seen whitish smoke from additives and when a buddy poured transmission fluid into his carb it was sort of grayish, so keep that in mind also. |
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#6 | |
~Rest In Peace~
Join Date: May 2005
Location: CALIFORNIA NOR CAL
Posts: 9,707
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Re: White Smoke coming out Right Bank...Need some help Please!
Quote:
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is it fast ? it has a lighting bolt donut? B___H please, I can remove 90% of your so called "beauty" with a kleenex |
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#7 |
Registered User
![]() Join Date: Oct 2011
Location: jackson michigan
Posts: 755
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Re: White Smoke coming out Right Bank...Need some help Please!
Pull all the spark plug's. Lay them out in order. You can tell alot from how they look. If it's lean on that bank are all the plug's gray/white? Or only one or too. If you are burning antifreeze in that bank the plug's wii look clean like new. It will most likely only be one or two plug's. You can not tell by looking thru the carb if that side is plugged on the primary .All you will see is the shot from the pump.
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#8 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,939
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Re: White Smoke coming out Right Bank...Need some help Please!
A Holley 4bbl carb needs at least 6psi of pressure to run properly. You're way lean. For my street rigs with Holley 4bbl carbs I use a Carter "street" fule pump. It pumps a constant 6psi with no regulator.
Gary
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#9 |
Beer Drink'n Knuckle Dragger
Join Date: Mar 2010
Location: Eatonville, WA
Posts: 493
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Re: White Smoke coming out Right Bank...Need some help Please!
I'm working about 15 hour days for the next few days, then i'll have a few days off to take a look at it. But I always thought my carb wasn't getting enough from what my friends have said. I actually even cleaned the pump a while back, but made no differance in pressure. And i'm just reading that off the pressure gauge on the fuel rail before the split.
I'm interested in this carter pump...is that something i'll have to order, or will a local part store carry that? And Looking around the net, do you have a specific part number for a small block 350? Thanks for all the help guys...Kinda new to carb tuning, so all this information is helpful and appreciated. Jack
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#10 |
Account Suspended
Join Date: Dec 2008
Location: indisclosed
Posts: 1,515
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Re: White Smoke coming out Right Bank...Need some help Please!
Is sm 420 manual transmission?
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#11 | |||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,939
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Re: White Smoke coming out Right Bank...Need some help Please!
Quote:
Just checked Jegs, and they offer it in a polished version for the SBC for $152 bucks! Yikes! ![]() The "strip" super pump os $85 bucks, but runs at 7 - 8.5 psi. So you'd have to run a regulator. Gary
__________________
'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
Quote:
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#12 |
Beer Drink'n Knuckle Dragger
Join Date: Mar 2010
Location: Eatonville, WA
Posts: 493
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Re: White Smoke coming out Right Bank...Need some help Please!
Yes its manual...so no Tranny fluid in the motor
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#13 |
*** That's interesting ***
Join Date: Oct 2008
Location: Pittsburgh, PA
Posts: 2,772
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Re: White Smoke coming out Right Bank...Need some help Please!
I've had a hard time finding the older Carter stuff these days. Seems like stores like Advance and Autozone sell Airtex/Master pumps now when they used to sell lots of Carters. Though I agree if you can find a Carter, use it. When I put the Street Avenger on my truck, I used a 80GPH Holley pump (PN 12-834) from Advance. Around $75.
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Tom ![]() Chevy by day... 1969 Chevy C30 Rollback Tow Truck -- 383 stroker, 4L80E 2011 Chevy Caprice PPV 9C3 6.0L 1995 Chevy Caprice 9C1 1994 Chevy Caprice 9C1 #3 1995 Chevy Caprice Wagon #2 1995 Chevy Impala SS Mopar by night... 1969 Dodge Charger 1972 Chrysler Newport 2dr Hardtop (27K miles) Plus others... |
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#14 |
Beer Drink'n Knuckle Dragger
Join Date: Mar 2010
Location: Eatonville, WA
Posts: 493
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Re: White Smoke coming out Right Bank...Need some help Please!
Edlebrock sells a performance pump around 120.00 that pumps a constant 6psi w/o a regulator...any of yall use this pump before? I'd rather spend the 120 on a regulated pump than buy an 80 dollar pump have to buy a decent regulator for about the same price or greater than the pump...plus adding a regulator just adds one more part that can go bad that I'll have to troubleshoot later.
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#15 | |
*** That's interesting ***
Join Date: Oct 2008
Location: Pittsburgh, PA
Posts: 2,772
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Re: White Smoke coming out Right Bank...Need some help Please!
Quote:
But with a Holley carb, the 80 GPH pump I mentioned above is a Holley part and should not need a regulator. It's designed to hook straight up to a Holley carb. I also agree that you can probably get away with a stock 40 GPH pump, so one of the Airtex/Master pumps from Advance/Autozone might also work. Problem is their specs for a '69 350 say they put out 7.5 - 9psi. I'd be worried about that. You might have to search for different years 350 and see if one puts out the range you need. 7.5 psi is max for a Holley. Mine hangs around 7psi.
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Tom ![]() Chevy by day... 1969 Chevy C30 Rollback Tow Truck -- 383 stroker, 4L80E 2011 Chevy Caprice PPV 9C3 6.0L 1995 Chevy Caprice 9C1 1994 Chevy Caprice 9C1 #3 1995 Chevy Caprice Wagon #2 1995 Chevy Impala SS Mopar by night... 1969 Dodge Charger 1972 Chrysler Newport 2dr Hardtop (27K miles) Plus others... |
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#16 | |
Beer Drink'n Knuckle Dragger
Join Date: Mar 2010
Location: Eatonville, WA
Posts: 493
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Re: White Smoke coming out Right Bank...Need some help Please!
Quote:
I'm an aircraft mechanic, so I would think this would be easier, but I learn new things every day, and makes me feel good!
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#17 |
Registered User
Join Date: Dec 2008
Location: NW-Ohio
Posts: 2,525
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Re: White Smoke coming out Right Bank...Need some help Please!
your fuel demands aren't outside the range of a stock GM pump as is.
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#18 |
Beer Drink'n Knuckle Dragger
Join Date: Mar 2010
Location: Eatonville, WA
Posts: 493
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Re: White Smoke coming out Right Bank...Need some help Please!
So I went to the parts store yesterday on my way home from work...bought the holley p/n 12-834 w/o regulator...i'm gonna see how this goes. gonna install it either after work today, or tomorrow. found out my lower radiator hose has a huge leak coming off the water pump...(one of the universal hoses not a stock replacement hose.) looks like that's gonna have to be replaced) would you guys recommend adding a gasket sealer to the paper gasket that comes with the fuel pump, or just proper torque specs and the paper gasket? I'll inspect the pushrod as well when i change the pump.
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#19 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,939
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Re: White Smoke coming out Right Bank...Need some help Please!
All I've ever used on a fuel pump gasket is Gasgacinch.
It's all I use on any gaskets to be honest. ![]() Gary
__________________
'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
Quote:
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#20 |
Beer Drink'n Knuckle Dragger
Join Date: Mar 2010
Location: Eatonville, WA
Posts: 493
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Re: White Smoke coming out Right Bank...Need some help Please!
ok...so now i've got about 5.5-6psi fuel pressure...threw in a new Holley 12-834 fuel Pump...still smoking. I adjusted the misture screws and it idles nicely now, but still smoking out the right bank heavy.
i looked at the headers and there is some liquid around the number 8 exhaust port coming off the block. Not sure what this is yet cause it's too hot to get a finger in there, but it's not dripping to the ground, so i hadn't seen this before. I don't know if this is a carb issue, or that it isn't...smoke still doesn't smell sweet. But it's bellowing out pretty good. What would cause liquid to come out of the exhaust port? I mean could a leaky exhaust manifold gasket cause this. They are hooker headers Also...when looking at the carb, what should i be looking for to see if it's too lean? Just doesn't make sense that the carb could be feeding one side differantly into the intake (just thinking of the physical aspects of the carb and the intake openings to the block. Jack
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![]() ![]() - 67 GMC Long-Wide 350/SM420 My BACON Wrapped Meatloaf Recipe Last edited by Mr-Jack; 05-22-2012 at 01:42 PM. Reason: more info |
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#21 |
Beer Drink'n Knuckle Dragger
Join Date: Mar 2010
Location: Eatonville, WA
Posts: 493
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Re: White Smoke coming out Right Bank...Need some help Please!
pulled the number 8 plug...can't tell what the liquid was, but it's smokey inside the cylinder...I manually cranked motor to see if any liquid would come out, but it didn't...is it safe to turn the truck over with the plug out of the block? just wanna see if something comes out when i crank...i either want the bad news or the reallly bad news now. anybody smell the problem yet?
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#22 |
*** That's interesting ***
Join Date: Oct 2008
Location: Pittsburgh, PA
Posts: 2,772
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Re: White Smoke coming out Right Bank...Need some help Please!
OK, now I'm worried that your problem might be more severe. Fixing the fuel problem was a certainty, 3psi was no good. But now we have to dig deeper. I'm a little stumped too since your original post mentioned that one header and muffler was much hotter than the other and that indicates lean. But now I question that.
Does the smoke go away when the truck warms up or does it continue? On a cool morning, just about any engine will produce reasonable amounts of water vapor until it warms up. It's especially pronounced on vehicles without cats. And can occasionally be uneven per side. Once the truck warms up, hold a piece of cardboard about 2 inches from your exhaust pipe exit. Does this white smoke quickly condense into liquid on the cardboard? If so, this is probably coolant. And that's bad. Pull all of the spark plugs on that side. Tell us what they look like. While you are at it pulling plugs, verify your firing order. And wire routing. Double check and triple check. Lots of other ideas come to mind such as your intake, etc. We need to tackle these one by one.
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Tom ![]() Chevy by day... 1969 Chevy C30 Rollback Tow Truck -- 383 stroker, 4L80E 2011 Chevy Caprice PPV 9C3 6.0L 1995 Chevy Caprice 9C1 1994 Chevy Caprice 9C1 #3 1995 Chevy Caprice Wagon #2 1995 Chevy Impala SS Mopar by night... 1969 Dodge Charger 1972 Chrysler Newport 2dr Hardtop (27K miles) Plus others... Last edited by storm9c1; 05-22-2012 at 02:12 PM. |
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#23 |
Beer Drink'n Knuckle Dragger
Join Date: Mar 2010
Location: Eatonville, WA
Posts: 493
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Re: White Smoke coming out Right Bank...Need some help Please!
I'll do the cardboard thing now...and once the truck is warm, it gets worse...both banks did it at first only sputtering...then when the truck got warmed up, the left bank was clean and the right bank started smoking like a white bonfire.
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#24 |
Beer Drink'n Knuckle Dragger
Join Date: Mar 2010
Location: Eatonville, WA
Posts: 493
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Re: White Smoke coming out Right Bank...Need some help Please!
ok...smoke condensed to water and got the cardboard wet...pulled the plugs and they look clean. Now...i haven't had these plugs installed long...cause i just installed them about a couple of weeks ago or so before i started diagnosing the motor. I didn't keep the old plugs, but they didn't look clean like these. Firing order is correct as well (Plug wires are super long)
The PO did have water in the radiator...I didn't think anything of it. but I do know that people trying to sell a vehicle with a motor problem can somewhat mask a problem like this to the seller. I got a screamin deal on the truck tho, so i was expecting a little bit of work. just trying to figure out what that work is at this point.
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#25 |
Beer Drink'n Knuckle Dragger
Join Date: Mar 2010
Location: Eatonville, WA
Posts: 493
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Re: White Smoke coming out Right Bank...Need some help Please!
This is a shot of the wet spot on the header and block around the #8 plug
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350 chevy small block, header, white smoke |
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