NOPE __ TAIN'T BLOWBY.
I put about half a quart or so every 3000 miles. No smoke at all other than when oil drops down on the exhaust. I took it to another mechanic and he confirmed massive valve cover leak ( which is what I originally thought ) I think the first mechanic just didn't want to bother with it. Thanks .does it blow blue smoke at start up? how often do you add oil if at all? if you dont need to add much oil between changes and its not coughing out blue in the morning then you just need the gasket, grommets, spark plug tube seals, and yeah spark plugs will get that pep back in your step. mechanic probably pulled a spark plug and the well had some deep oil in it. thats common, burns up plugs too. its from the seals leaking, not blow by.
look at rock auto for cheaper parts. some people will try to tighten the valve cover bolts up but id be careful. use a torque wrench if possible but if they are real loose you can gently snug them. wont help the plugs out much though
They looking into that too.just ignore me ... good choice.... bye
Thanks.OK, I'll tell him.
You need to clean your PCV system! See this for more information and how to clean it.
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UPDATED: This is your PCV --- Treat it nicely and...
This is the compilation I promised youse guys ...... in ONE videowww.trailvoy.com
Thanks for the info. Love this vehicle and want it to last as long as possible. I am still learning when it comes to working on them though.OK, I'll tell him.
You need to clean your PCV system! See this for more information and how to clean it.
![]()
UPDATED: This is your PCV --- Treat it nicely and...
This is the compilation I promised youse guys ...... in ONE videowww.trailvoy.com
the PCV can cause increased crank case oil pressure, which gets relieved through the spark plug tube seals and valve cover gasket. whichever gives first. either is better than the head gasket. any time you've got missing oil it could be something less than great. pint every three thousand is enough to start investigate for sure. i like to change my 4.2 L6s at three when im running dinosaur oil and getting it done somewhere.They looking into that too.
Thanks.
Thanks for the info. Love this vehicle and want it to last as long as possible. I am still learning when it comes to working on them though.
Can you provide a part number for the PC Valve you say you can change?the PCV can cause increased crank case oil pressure, which gets relieved through the spark plug tube seals and valve cover gasket. whichever gives first. either is better than the head gasket. any time you've got missing oil it could be something less than great. pint every three thousand is enough to start investigate for sure. i like to change my 4.2 L6s at three when im running dinosaur oil and getting it done somewhere.
point is you may as well have that PCV changed on while they in there. should have almost no oil usage and minimal leakage afterwards. as long as they are competent or experienced with the atlas motors. sounds like wrench #1 just didn't know what they were looking at.
I too have similar seepage, changed PCV hose on driver side (GM #12575660 ) after cleaning with carburetor cleaners, Mechanic could push compressed air from driver side vent, still have high oil consumption.You've got those oil leaks because you have pressure in the crankcase.
Solve THAT and you might cure all your oil leaks.
you can try to look in the spark plug wells and see if there is oil in them or you may see oil on the sides of the block. those things indicate a valve cover gasket mating issue. oil dripping from the drain plug may indicate a stripped pan or plug or leaky oil pan gasket. oil on the filter points to a poor seal on the filter. blue smoke at cold start is a sign of weak rings on the pistons.I too have similar seepage, changed PCV hose on driver side (GM #12575660 ) after cleaning with carburetor cleaners, Mechanic could push compressed air from driver side vent, still have high oil consumption.
Last week fixed vacuum leak on break booster.
Thanks for the suggestion, will check with the mechanic on spark plug leakages.you can try to look in the spark plug wells and see if there is oil in them or you may see oil on the sides of the block. those things indicate a valve cover gasket mating issue. oil dripping from the drain plug may indicate a stripped pan or plug or leaky oil pan gasket. oil on the filter points to a poor seal on the filter. blue smoke at cold start is a sign of weak rings on the pistons.
You definitely need to replace those gaskets, replace your pcv valve, clean the throttle body, etc.First time on here need opinion from others who know more about this vehicle. I have a 2006 trailblazer ext 4x4, 4.2 6 cylinder 220,000 miles. I noticed a burt oil smell a whole back so I pop the hood and look for any leaks. I see oil running down from what I assumed was the valve cover gaskets ( know a little but will admit nowhere near a mechanic . So I call my mechanic and tell him I'll pick up the gaskets and drop it off in a few days. Today he calls me back and says he isn't going to change them because I have severe blowby and it wouldn't do any good. I go pick up the trailblazer and bring it home, take off the oil cap while it's running. No smoke, no pressure coming out when I hold my hand over it. No ticking and runs smooth. Will admit it doesn't have the take off that my wife's 07 trailblazer does but can blowby cause this much oil? It has had a leak as of late fee drops under it right after I park. Did notice today that there was a drop here and there landing on the hot exhaust because you could see the smoke pop up and smell it burning more.
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