Oil Burning Problem

[dirty32]

I have a stock 1990 Talon TSi AWD that has 150xxx miles on it. I just purchased this and it did not smoke except at idle (valve guide seals) and it had good compression accross the board (142, 142, 137, 146).

After buying the car and driving it home it has started to smoke all the time but more so during acceleration and idle. Also the dipstike was blown out of the holder when I went to check the level. When I pulled the plugs they were fouled badly so I replaced them for a new set to drive on and read.

I will post pictures, video and wet/dry compression test results tonight when I am able to get everything loaded up.

Also when I checked the turbo there was no in and out shaft play, spun freely and had the usual up and down freeplay of a thrust bearing.

I will try and have all of the updates up by 5 today west coast time.

Thank you to everyone in advance, hopefully I was not fooled on this one.

 

[19Eclipse90]

FAQ Locator Short Tips
>>Dipstick popping out - happens due to crankcase pressure pushing the dipstick up:
A good running motor will blow out a dip stick with a shriveled hard rubber seal
A dead motor (lots of blow by, busted pistons) will blow out a good dipstick
A 1/2 dead motor will blow out a 1/2 dead dip stick
Depending on the actual cause and the severity, the fixes can be:
A spring/wire to hold the dipstick down
Pinch the tube at the top a bit
Get a new dipstick
A full engine rebuild or new pistons
If it blows out under boost with a glowing red turbo and manifold, it makes a nice engine fire. If it happens even once, figure out the cause and fix it.>>

You may also have blown turbo seals.

 

[Gstclipse69]

Too much crankcase pressure can be caused by an incorrect pcv valve setup. I know you said your stock but check to make sure the breather on the valve cover is still hooked up to the nipple on the intake. A new oem pcv valve would be a good idea as well. What kind of spark plugs did you replace yours with? NGK I hope

 

[dirty32]

The previous owner had replaced the pcv valve and I do not know if it is OEM but tomorrow when I am back home I will get one. I replaced the plugs with a set of NGK BPR6SE.

I am going to go run all of those tests assuming that there is enough oil left in the car to run it.

Best way to figure out if the turbo seals are blown is by oil in the intake track and shaft play or a combination of the both.

Thanks for the quick help guys.

 

[Defiant]

I have a stock 1990 Talon TSi AWD that has 150xxx miles on it. I just purchased this and it did not smoke except at idle (valve guide seals) and it had good compression accross the board (142, 142, 137, 146).

I think your hopeful diagnosis of "valve guide seals" missed the used-up rings.

 

[dirty32]

I updated the thread similar to this in the general newbie forum.

I will copy the whole post from there over to here:
(If moderators would prefer one thread on this topic instead of two feel free to remove one)

Sorry about the long delay on updating this thread. Today I took the car out and it did not smoke at all during initial start up or while it warmed up. I took it out and did a few WOT pulls during which it blew blue oil smoke under boost. I brought it back to run a compression test.

When I pulled the plugs there was a small accumulation of oil in the middle of the valve cover, approx. an oil cap or two worth, and this was on the left side of the valve cover if you are looking at it from the front of the car. I also noticed a small amount of oil burning coming from around the turbo/down pipe area.

Here is a picture of the plugs. They are in order of cylinder as if you were looking at the engine from the front of the car as well.

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Close up on two fouled plugs:

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When I took the compression the first time it was as follows:

130(150 the second time with open throttle and oil), 147, 150, 148

The reason for the mistake on the first cylinder was that my roommate did not hold the throttle open and unfortunately I did not notice or double check with him until after I dumped a cap full of oil in.

All of the readings are +/- a point but overall the compression was around 148-150 across the board which somehow is better then when I checked it before buying the car?

Any help would be greatly appreciated. It seems that valve guide seals could be the culprit or possibly the turbo has gone or is going bad. I am getting my hands onto a leak down tester later today but do not have a garage or air compressor which will make things very tricky.

Thank you in advance for any help or insight.