|
|
Post by the94z on Oct 10, 2005 21:19:06 GMT -5
Well I have posted a million times about my car puffing a small cloud of smoke( bluish white) at a WARM startup. And the same kind of smoke coming out after WARM at IDLE. Took it to a performance shop twice, and they found nothing, just a valve cover leak, which really doesnt solve my problem. They checked the oil pressure, and it read 10psi for every 1000 rpms...is that fine? Well...everyone tells me vavle seals..or tune. I really dont have money to do both. Which should i do. Or is it even valve seals you think? And how much to do valve seals on my car? THANKS.   Mods: 95 Lt1 355 A4.Bored.030overFlatTopPRWPistons,ForgedRods,10 2 1 compresion,GMLt4Hotcam,CompCam:1.6rr's,Lifters, Pushrods,Springs,Retainers,Guide Plates,Stg.1 P&P,Gasket Match Port,HookerMidlengthHeaders,CustomYPipe,OpenPipesW /Cutout( 3inch- 2.5inch DualOutlets StraightPipe NoMuffler NoCat)MSDIgnition6al,MSDBlaster2Coil,MSD Superconducter8.5mmWires,NGKTR6Plugs,K&NCAI,150WetShot NX,Lt4TimingChain,StockComp.,StockTrans,StockRear, 1.5inchdrop,VentedOptiTTOPS.MellinHiVol.OilPumpLT4 KM,160,Freemods |
|
|
|
Post by fast93z on Oct 10, 2005 22:01:27 GMT -5
How many miles on the engine? It does sound like bad valve seals to me.
|
|
|
|
Post by the94z on Oct 10, 2005 22:33:38 GMT -5
12k on rebuild. and on setup as well. EDIT: it smokes when reving.
|
|
|
|
Post by 1bad2k2ta on Oct 10, 2005 22:38:39 GMT -5
12k on rebuild. and on setup as well. EDIT: it smokes when reving. There are only a few ways oil can get in the cylinders. Since the leak-down test showed the chambers are sealing, that pretty much means it is coming in the intake valve when it is open, therefore guides/seals are probably worn. Do you know if the heads were rebuilt when the rest of the motor was rebuilt? |
|
|
|
Post by the94z on Oct 10, 2005 23:10:45 GMT -5
Everything was machined at a machine shop and as posted heads have Port and polish stage 1.
|
|
|
|
Post by 1bad2k2ta on Oct 10, 2005 23:23:28 GMT -5
Everything was machined at a machine shop and as posted heads have Port and polish stage 1. One other thing you can try is the PCV valve. Pull it off and see if it has any significant amount of oil in it. I really can't see it passing enough oil to smoke consistently, but it is easy to check. If it does have some oil in it, pull it off and plug up, or cap off, where it connects to the intake and engine, then see if it still smokes when you get on it. My money is on the valve guides/seals, though. |
|
|
|
Post by the94z on Oct 10, 2005 23:30:25 GMT -5
if it doesnt smoke when i cap it off..what does that mean? And if it doesnt have oil on the pcv valve( which is new) dont try the capping thing right? What would that mean? And lets say I want to the valve seals myself...any guides out there with pics? Or instructions that are detailed yall could give me? And why would the guides be bad? They are comp cam guides....
|
|
|
|
Post by 1bad2k2ta on Oct 10, 2005 23:47:04 GMT -5
if it doesnt smoke when i cap it off..what does that mean? And if it doesnt have oil on the pcv valve( which is new) dont try the capping thing right? What would that mean? And lets say I want to the valve seals myself...any guides out there with pics? Or instructions that are detailed yall could give me? And why would the guides be bad? They are comp cam guides.... Yeah, if there is no oil in the PCV, it probably isn't the problem. I am talking about the valve guides, not the pushrod guides. They are the tube the valves slide up and down in. They can wear out, too. |
|
|
|
Post by the94z on Oct 10, 2005 23:56:51 GMT -5
I have comp cam guide plates...u think they are bad? If so how can i tell or should i replace with seals? How much are they? THANKS MAN!
|
|
|
|
Post by 94m6hardtopz on Oct 11, 2005 2:55:15 GMT -5
it could be something as simple as a leaking intake gasket. id look at that, as well as the valve stem seals and valve guides.
|
|
|
|
Post by 1bad2k2ta on Oct 11, 2005 6:15:22 GMT -5
I have comp cam guide plates...u think they are bad? If so how can i tell or should i replace with seals? How much are they? THANKS MAN! Your Comp guide plates are fine, they are for the pushrods. The valve guides are the tubes that run through the head that the valves slide up and down in. |
|
|
|
Post by Fire67 on Oct 11, 2005 8:49:34 GMT -5
it could be something as simple as a leaking intake gasket. id look at that, as well as the valve stem seals and valve guides. My thoughts exactly! If the heads were rebuilt, I'd lean more toward the intake gaskets... The heads were probably machined, which can make the intake manifold not fit correctly anymore.... Its actually a common thing for the LT1-LT4 intake gaskets to leak on the oil side. If you have an LS1, dont worry about the gaskets, check the valve seals. |
|
|
|
Post by the94z on Oct 11, 2005 11:39:05 GMT -5
crap! Where should i put my hand to find if i have an intake oil leak? And btw....shop found valve cover wasnt leaking just a small grommet...but now they did find A BIG EXHAUST LEAK! Could this cause anything? Its right where my ypipe meets my collector....and they are changing my oil...they say 0w20 is what i should run under 20k miles...so they putting some of that( valvoline..is it good enough for my car?)...what do yall think? P.s they tried to tell me my bearings are bad...but i dont hear anything and the mech gauge on oil pressure showed 10psi for every 1k rpms.
|
|
|
|
Post by fast93z on Oct 11, 2005 11:44:03 GMT -5
crap! Where should i put my hand to find if i have an intake oil leak? And btw....shop found valve cover wasnt leaking just a small grommet...but now they did find A BIG EXHAUST LEAK! Could this cause anything? Its right where my ypipe meets my collector....and they are changing my oil...they say 0w20 is what i should run under 20k miles...so they putting some of that( valvoline..is it good enough for my car?)...what do yall think? P.s they tried to tell me my bearings are bad...but i dont hear anything and the mech gauge on oil pressure showed 10psi for every 1k rpms. 0w20?  I think that is to thin of oil. 5w30 should be sufficient. You can spray brake clean along the edge of the intake (at the gskts) while it is running to see if you have a leak. It the car tries to die while doing this...you have a leak. |
|
|
|
Post by the94z on Oct 11, 2005 11:54:35 GMT -5
man its gonna be hard trying to spray back there...huh....and the motor is gonna be hot!!! so the exhaust leak has nothing to do with this? And if i dont have an intake leak...its my valves/guides then huh?
|
|
|
|
Post by the94z on Oct 11, 2005 11:58:19 GMT -5
they are going with standard weight... and a couple days ago they checked the oil pressure and it was like i said..they checked it today and its 0psi...whats going on..
|
|
|
|
Post by 1bad2k2ta on Oct 11, 2005 12:41:04 GMT -5
they are going with standard weight... and a couple days ago they checked the oil pressure and it was like i said..they checked it today and its 0psi...whats going on.. If they have put 0w20 oil in it, it will show lower oil pressure. I agree with fast93z, that oil is too thin. I have never used anything less than 10w30 in any of my vehicles, even when breaking them in. This is South Texas, you just don't need anything thinner than that. Even 5w30 is more for temps that get down to 0 or less. Not only that, but oil that thin could be contributing to the smoking problem because it will blow by easier. |
|
|
|
Post by the94z on Oct 11, 2005 13:13:41 GMT -5
well like i said they went with standard weight anyways..and now that they changed it oil pressure is supposedly back up to 21ps1 YAAAY, but i dont know if smoking has stopped...
|
|
|
|
Post by the94z on Oct 11, 2005 14:58:27 GMT -5
Well I got my car back and when fully warm oil pressure is at 8psi at idle in drive and 10psi at idle in park....they told me its fine...it doesnt smoke at an idle from what ive seen yet...i will drive it some more to find out though. They also told me that when i rev it smokes because im running rich!
|
|
|
|
Post by 94m6hardtopz on Oct 11, 2005 15:21:15 GMT -5
you need to find someone who knows what they are doing. where do you live?
|
|
|
|
Post by the94z on Oct 11, 2005 15:23:45 GMT -5
In Sa, Tx like 1/2 a mile from north star mall.
Also why do u say i need to find someone that knows what they are doing whats wrong?
|
|
|
|
Post by 1bad2k2ta on Oct 11, 2005 15:25:34 GMT -5
Well I got my car back and when fully warm oil pressure is at 8psi at idle in drive and 10psi at idle in park....they told me its fine...it doesnt smoke at an idle from what ive seen yet...i will drive it some more to find out though. They also told me that when i rev it smokes because im running rich! When the car is rich, the smoke will be black, for the most part, not blue or white. At this point, before you spend any more money on it, check the oil when it is cold, before you start it, pay close attention to where it is on the dipstick, maybe even mark it with a sharpie, drive it for a few days or a week, park it back in the same place, then check it again when it is cold and see if it is actually consuming any oil. If it is not consuming any oil, it may be smoking due to a rich condition, in which case, you may have bad O2 sensors. |
|
|
|
Post by 94m6hardtopz on Oct 11, 2005 15:43:39 GMT -5
In Sa, Tx like 1/2 a mile from north star mall. Also why do u say i need to find someone that knows what they are doing whats wrong? because of this.... "Took it to a performance shop twice, and they found nothing, just a valve cover leak, which really doesnt solve my problem. " this kind of stuff is exactly why i only let certain people work on my car if i dont do it myself. |
|
|
|
Post by the94z on Oct 11, 2005 23:11:09 GMT -5
I have no ses light....and i will check if oil is burning....let yall know, but it still smokes at idle and at startup( only when warm!) and the oil pressure seems good now though. What could the smoke be!! GAHHHH!!
|
|
|
|
Post by '68SuperchargedLT1Camaro on Oct 12, 2005 0:40:16 GMT -5
You need to do an oil consumption test like Tom (1bad2k2ta) recommended. Watch your oil level for a while and get back with us.
|
|
I think that is to thin of oil. 5w30 should be sufficient. You can spray brake clean along the edge of the intake (at the gskts) while it is running to see if you have a leak. It the car tries to die while doing this...you have a leak.
