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Eagle 258 with oil soaked air cleaner

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MIPS View Drop Down
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    Posted: Mar/14/2019 at 8:04pm
I noticed this was an issue when I first bought the car. The air cleaner was contaminated, the PCV breather filter element was soaked and the interior of the air cleaner down to the lowest corner of the snorkel had oil in it. It wasn't so much that I had it "gushing" out but enough for it to pool in the cleaner. Removed and tested the PCV valve and found it to occasionally get stuck partially open, so it was replaced. Cleaned out the air cleaner housing, squeegeed out the breather filter and ran it for another week and a half and found the breather again had oil in it and oil was developing around the cleaner again.
Attached a vacuum gauge to the PCV valve and found 18 InHg of vacuum, which should be plenty. Disconnected the PCV breather hose and tried from that port with the engine at a warm idle and found it could at best pull the crankcase down to 1 InHg of vacuum, rising to a positive 1PSI of blow-by if revved, which in my head sounds okay IF the vacuum was higher, but I've never worked on an engine like this.
The engine has an aluminum aftermarket valve cover with oil baffles on the PCV inlet and outlet. I am aware there is currently a small amount of oil leaking from the front right corner of the cover gasket but that can't explain the massive loss of vacuum. The rest of the gasket seems good and there are no other signs of oil leaks. Engine and carb is otherwise stock.

Edited by MIPS - Mar/14/2019 at 8:06pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Trader Quote  Post ReplyReply Direct Link To This Post Posted: Mar/14/2019 at 9:37pm
Time to do a cylinder compression test. A bad intake valve will loose vacuum. Bad rings will loose vacuum and push oil or burn it.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote partsguy Quote  Post ReplyReply Direct Link To This Post Posted: Mar/14/2019 at 10:22pm
does the engine have alot of blow by ?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MIPS Quote  Post ReplyReply Direct Link To This Post Posted: Mar/14/2019 at 10:44pm
I only have the tools to measure vacuum and pressure and do not have the components for even a DIY manometer but at the least there has been no visible signs of a very serious blow-by condition or excessive oil consumption.

The plugs are being swapped this weekend due to age. I can check the cylinder compression then and the status of the old plugs.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote partsguy Quote  Post ReplyReply Direct Link To This Post Posted: Mar/14/2019 at 11:02pm
as trader suggested a compression test will show alot,
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Post Options Post Options   Thanks (1) Thanks(1)   Quote pacerman Quote  Post ReplyReply Direct Link To This Post Posted: Mar/15/2019 at 4:15pm
Make sure you have a working PCV valve and that the PCV valve circuit is sound and connected properly.  

Didn't Linda Rondstadt have a hit song about that problem?  Blow By You.    Joe
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tomj Quote  Post ReplyReply Direct Link To This Post Posted: Mar/15/2019 at 9:55pm
this is too obvious and oyu sound alert, but it's not over-full of oil?

that's odd... trader's suggestion will tell a lot. but even with a fair amount of blowby, say, old engine, that might chug fumes out the filler cap but liquid oil? neva herda dat.

you can run with a plugged-off PCV for testing. no harm will be done in a week or two even, and it might help separate symptoms.

with the engine stopped, you can manually check for a sealed crankcase; put a hose on the PCV and blow into it like inflating a balloon. it should hold the pressure reasonably well with your finger on the end of the hose. or use a Mighty-Vac, but probably a lot of pumps (it's a large volume).

divide and conquer.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote purple72Gremlin Quote  Post ReplyReply Direct Link To This Post Posted: Mar/16/2019 at 2:20am
Been my experience that when the air cleaner has oil in it...the rings are stuck or worn out.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Greyhounds_AMX Quote  Post ReplyReply Direct Link To This Post Posted: Mar/16/2019 at 7:21am
I'd check the compression as it might give some clues.

You could also consider cleaning the ring grooves a bit. The 1st gen Saturns had an oil consumption issue due to the ring grooves building up crud so the factory had a procedure for cleaning them that worked pretty good:

Procedure - 1 Internal Engine Cleaning

1. Warm up to normal operating temperature.

Important

In order for the cleaner to be effective, the engine must be warm.
2. Disconnect negative battery cable.
3. Remove spark plugs.

4. Rotate engine crankshaft until notch in crank pulley is at 3 o'clock (90° after top dead center) position. This will position all of the pistons midway in their bores.
5. Pour 3 ounces of GM Piston and Ring Cleaner (P/N 12378549 12 ounce bottle) into each cylinder through the spark plug hole.
6. Cover the cylinder head and spark plug holes to prevent debris from getting into the combustion chamber and to prevent excess evaporation of the cleaner.
7. Allow the engine cleaner to soak for a minimum of 2 hours.

Notice

After the minimum 2-hour soak, there may be some cleaner left in the combustion chambers. Do not start the engine until all of the cleaner has been removed from the combustion chamber or severe engine damage may occur.
8. After the minimum 2-hour soak, remove the remaining cleaner from the combustion chambers by placing shop towels over all of the spark plug holes and cranking the engine through a few revolutions.
9. Install the spark plugs and spark plug wires.
10. Start the engine and run only enough to reach normal operating temperature.
11. Drain the engine oil and remove oil filter.
12. Install new oil filter (P/N 21000872).

Important

*Mobil® 1 Synthetic 5W-30 or 10W-30 engine oil is to be used during the initial oil change interval following this procedure. Mobil® 1 Synthetic oil has excellent engine cleaning properties that will aid in removing deposits that were loosened and softened during this procedure.

*We believe this source and their products to be reliable. There may be additional manufacturers of such products. General Motors does not endorse, indicate any preference for or assume any responsibility for the products from this firm or for any such items which may be available from other sources.
13. Install 4 quarts (3.8 L) of Mobil® 1 Synthetic 5W-30 or 10W-30 engine oil.
14. Return vehicle to customer.
15. After 1500-3000 miles of operation, have the customer return for next oil change.
16. Drain engine oil and remove oil filter.
17. Install new oil filter (P/N 21000872)
18. Install 4 quarts (3.8 L) of engine oil meeting Saturn specifications.
19. Refer to Oil Consumption Test and perform steps 4 through 8.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote First_Gear Quote  Post ReplyReply Direct Link To This Post Posted: Mar/16/2019 at 12:03pm
If you find poor compression. Rent or buy a leakdown tester. It is an invaluable tool. Used correctly you can determine if its the rings or the intake or exhaust valve.

PS: to use the tool you must have an air compressor
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