98 GT smoking bad......blue smoke!

98blackstallion · Aug 2, 2005

ok guys here is the deal. My 98 Gt just recently started to smoke badly. Heres what it does. I will let it idle for just a small 1 minute idle and then I will take off normally from that idle and it will blow blue smoke which is OIL! It doesnt smoke on decel or high revs just on the first second of a starting take off after it sets at a light or just at idle. what can be causing this to do this. I did a compression check a month ago and it came out a damn perfect 160 on every cylinder. Also i did an oil change a week and a half ago and yesterday I check my oil only to find a dry dipstick i used 5w-30 when I did my oil change. Could that be the problem?. I am really worried about this and I need some help.

prsrizdgt · Aug 2, 2005

98blackstallion said:
ok guys here is the deal. My 98 Gt just recently started to smoke badly. Heres what it does. I will let it idle for just a small 1 minute idle and then I will take off normally from that idle and it will blow blue smoke which is OIL! It doesnt smoke on decel or high revs just on the first second of a starting take off after it sets at a light or just at idle. what can be causing this to do this. I did a compression check a month ago and it came out a damn perfect 160 on every cylinder. Also i did an oil change a week and a half ago and yesterday I check my oil only to find a dry dipstick i used 5w-30 when I did my oil change. Could that be the problem?. I am really worried about this and I need some help.

My guess is either valve seals or valve guides. I can't remember which is responsible, but the blue smoke after idling for a minute or so is indicative of wear in this area. Chevy's were notorious for this years ago.

98blackstallion · Aug 2, 2005

well i guess this would be a good time to go ahead and get some PI heads to match my PI intake.

98blackstallion · Aug 2, 2005

oh yeah and since i noticed the car blowing smoke its been running really sluggish. Could the extra oil in the cylinders be doing this?

prsrizdgt · Aug 2, 2005

98blackstallion said:
oh yeah and since i noticed the car blowing smoke its been running really sluggish. Could the extra oil in the cylinders be doing this?

It would definately effect power if it was bad enough. I couldn't say how much it would take before you would notice it though.

Did this come on all of a sudden, like within a day, or was it something you saw get worse and worse over a few weeks?

98blackstallion · Aug 2, 2005

I just started noticing it saturday night and i have gone threw 5 quarts of oil in less than 2 weeks. I noticed that the longer it sits at idle the more smoke it will blow out when i start going but stops quickly. It doesnt smoke at startup tho. I think its fouling my plugs which is causing it to run sluggish.

mrvax · Aug 2, 2005

98blackstallion said:
oh yeah and since i noticed the car blowing smoke its been running really sluggish. Could the extra oil in the cylinders be doing this?

The oil could be fouling the spark plugs.

jlfrd96 · Aug 2, 2005

hey black stallion mine is a 96 and it has been doing it for years...exact same symptoms to the t. I believe also its valve seals from what i could dig up...if you ever find out for sure please let me know...i will do the same...i am still deciding what to do.

MyEarsHurt · Aug 2, 2005

God is telling you to finish the PI swap, heads and all...

90RanGer · Aug 2, 2005

If you end up buying used PI heads take them to a machine shop before you put them on. I bought 2000 used PI heads with "20k miles" and I dropped them off at the machine shop for valve job and half the exhaust valve guides were toast, even though the heads were super clean and nice looking, so just a warning so you dont end up with the the same smoking even after pi swap heh.

98blackstallion · Aug 2, 2005

yeah god is punishing me for not finishing the swap lol. I plan on getting brand new PI heads for it. I noticed that today it did alot worse then normal. So I need to get these heads off quickly.

SRT Handz · Aug 2, 2005

i dont think its the valves.
Head Gasket and Rings

98blackstallion · Aug 2, 2005

i did a compression check and it checked out good so the rings are holding up good.

98blackstallion · Aug 6, 2005

well I figured what the hell i will do a compression check again cause the last one was about 2 months ago. What happens if its the rings what kinda symptoms would i be looking at?

2002BLGT · Aug 6, 2005

if its over 100-130K on that engine I would look for a lower mileage PI engine to swap in there .......IMO......

prsrizdgt · Aug 6, 2005

98blackstallion said:
well I figured what the hell i will do a compression check again cause the last one was about 2 months ago. What happens if its the rings what kinda symptoms would i be looking at?

You will see smoke about anytime the engine is running.

CanadaStang · Aug 6, 2005

Have you ever over heated it? Or ran it low on oil?

98blackstallion · Aug 6, 2005

yes i have run it low on oil thats how i noticed this little problem. In one week I managed to go through 5 quarts of oil 5w-30. I checked the stick and it was bone dry. Never had this problem before and i would check my oil every couple of weeks but i am glad i did it sooner tho. What happens if you run it low on oil? obviously it will blow the motor but aside from that.

Ok i just got finished with the compression check and here is the last one i did...

drivers side......before Pass....before
160 160
160 160
160 160
160 160

Ok now here is the new one...

drivers.................................pass..
170 165
160 160
165 165
165 165

How does the pressure rise on a motor that is getting higher in miles??? Well I can count out rings being the problem.

CanadaStang · Aug 6, 2005

It wouldn't hurt to check to see if your PVC valve is stuck. It should rattle if you shake it.

98blackstallion · Aug 6, 2005

its brand new and it rattles so its not the problem either..

98 GT smoking bad......blue smoke!

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