Oil film on rear bumper blue smoke on start up car runs great no smoke puffs on shift 90# compression on all cylinders

How to Fix Blue Smoke From Exhaust in Under 1 Hour

This might help explain the causes and where the fault might lie! You didn't mention the mileage, if high it could be worn valve guides or seals!

Blue smoke is an indication of oil being burnt. The oil can enter the combustion chamber for several reasons.

• Worn valve guides or seals
• Wear in power assemblies (ie cylinders, piston rings, ring grooves)
• Cylinder glaze
• Piston ring sticking
• Incorrect grade of oil (eg oil too thin, and migrating past the rings)
• Fuel dilution in the oil (oil thinned out with diesel)

At cold start, blue smoke is often evident, and can reflect reduced oil control, due to fouling deposits around piston rings or cylinder glaze (which is actually carbon deposited in the machined cylinder crosshatching. These tiny grooves actually hold a film of oil, which in turn completes the seal between the combustion chamber and the oil wetted crankcase). Blue smoke should not be evident at any time, but it is worth noting, that engines with good sound compression can actually burn quite a lot of oil without evidence of blue smoke. Good compression allows oil to burn cleanly, as part of the fuel. It is not good though!

blue smoke from any internal combustion engine indicates it's burning oil along with the air/fuel mixture........this can be caused by gaskets or seals. in higher mileage engines it can be caused by worn internal parts

I have seen this on old cars, my suspicion is that the seals on the valves are a bit worn. This allows some oil to get through during start up. Since it quits smoking, I would not be overly concerned. However, since it burns a quart every 1-2K miles, I am curious what the compression is. My Fiero does the same thing (occasional puff of smoke on start up) but does not need oil between 3,000 mile chages. It is a 2.5 liter. Here is nice tip: check compression on all cylinders, then recheck it adding a teaspoon of 2 cycle oil to the cylinders (one cylinder at a time). Some have said to use conventional oil for this, due to higher viscosity, but I always thought it might foul the spark plugs. If the compression goes up, it is ring wear, if not it is leaking through the valves.

Sounds like white smoke is antifreeze. It might be leaking all of the time. Does your antifreeze level fall gradually over a week's time?

Bad news. Depending on what your mileage is, you can have a burnt valve, sticking lifter, bad piston ring all on the right side of the engine. The blue smoke is burning oil. Oil from the crank case is being compressed up into the cylinder and being burned. You will have to get a compression check on that side of the engine. You check the compression one sparkplug at a time while the engine idles. A loss in compression will tell you what cylinder is failing.

Good luck and thanks for your question and I hope my suggestions help. burdfrenzy
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If you get a little puff of white/blue smoke just at start up , it probably means that one or more of your valve guide seals are worn.
While engine not running , a bit of oil gets in the cylinder , when it starts the oil burns off causing smoke. If it was smoking all the time , I would say rings are worn. If it is black smoke at start up , it indicates a fuel mixture problem. The valve guide seal problem may get worse over time.
On your post you say " for few mnt " if that means a few moments , than Valve guide seals , if you mean a few minutes , than more serious piston ring problem. Change your oil , and add a can of RESTORE , it will fill small scratches in cylinder walls , but will not fix badly worn rings.

most deffinately an internal issue. 2 possible problems oil seeping through valves when engine not running. sitting in combustion chamber and burns off during start up. 2 piston rings in one or more cylinders bad and letting oil blow by and start up is only time it is really noticeable.

Hi!
You are asking good questions, first the oil, I presume your vehicle is of high mileage? and possibly had a hard life with maybe late service intervals?
There are a few possibilities oil is being burned, first and this relates to your last question (Back compression) is worn compression piston rings, the compression of the combustion seeps past these and sends pressure through the oil scraper rings (Last set on the piston) increasing crankcase pressure which in turn forces a film of oil out of your breather pipe, the outlet is usually located on the air filter so it is drawn into the cylinders and is burned causing poor ignition and smoke from the rear.
Second and possibly combined is valve guide wear, the valves allow oil through their worn stems and seals causing a smoke haze, this usually clears a lot when engine reaches operating temp.
I hope this epic has clarified your query? please press the Blue Button for my Free! effort.
Thank You!
Paul 'W' U.K.

Hi!

What type of smoke can you see---

white smoke-
If you see a wispy, lingering white smoke that has a bittersweet smell, this is an indication that your car's engine coolant is leaking into the combustion chambers. This may be due to a leaky head gasket, or in a worst case scenario, a cracked cylinder head.

Make sure to take your car to the shop right away to get it fixed.
Thick white smoke---
If your vehicle is belching white smoke upon start-up, it is a sign that transmission fluid is entering the combustion chambers, possibly though a vacuum tube that connects the engine to the transmission.
This type of smoke can be confused with the normal puff of steam during start-up. If you are not sure, have your car inspected at the shop.

Blue/White Smoke--
A blue/white smoke is an indication that oil is being sucked into the combustion chambers through the valve guides. A quick fix for this problem is by replacing the valve seals. Valve seals are small, umbrella shaped pieces of rubber.

Do rate the solution.

Thanks
Rylee.