Compression seems okay.
Does the dipstick get pushed out? Is/are the dipstick o-ring(s) in good shape?
Is the hose to the PCV valve clear and getting vacuum?
Is the breather hose from valve cover(?) to intake downstream of air filter also clear?

 

The dipstick doesn't get pushed out, but when you remove the dipstick you can clearly see exhaust puffing out of the dipstick when the engine is at temperature. I cleaned the PCV valve.. I'll check the vaccum line and breather hose

 

2017 Elantra 2.0L Automatic

The car has exhaust blowby coming out of the oil dipstick, cant figure out why. I checked the PCV valve and now a compression test.

Did a cold compression test. (I forgot to warm it up.. WHOOPS.) Took all the plugs out, fuses for spark and gas. Cranked 5 times per cylinder.

From passenger side to drivers side:

Passenger > > > > Driver
195psi / 195psi / 193psi / 190psi

View attachment 499148

I read somewhere the numbers should be around 150.. but whatever i guess?? They're consistent.

Compression should be recorded at each tick of the gauge and compare to see how it's building.
You may want to do a running compression test or at least a leak down test.

 

Fully agree with carguy. Good compression should be reached in 2-3 revolutions. Next test should be a cylinder leakage test.
The reading is a comparison and depends on gauge accuracy.

 

How many niles

 

that Cold Compression reading is too high Almost sounds like either you got a restricted exhaust blowing back into engine giving a false higher than normal reading on the gauge or Piston compression rings are stuck is this engine useing any Oil.?

 

How many niles

142,000

Compression should be recorded at each tick of the gauge and compare to see how it's building.
You may want to do a running compression test or at least a leak down test.

difficult to do by myself

that Cold Compression reading is too high Almost sounds like either you got a restricted exhaust blowing back into engine giving a false higher than normal reading on the gauge or Piston compression rings are stuck is this engine useing any Oil.?

Google tells me this motor should have 170-200psi healthy compression

There is no spark and no fuel during a compression test.. therefore no exhaust

Not leaking oil and not burning oil


that said.. about 10-25% loss of original compression is normal for 100,000mi on an engine, so these numbers do seem a little high, given it has 142k. It is a brand new compression gauge, 20 bucks off amazon The car passed smog 1 month ago.

-Is the hose to the PCV valve clear and getting vacuum?
-Is the breather hose from valve cover(?) to intake downstream of air filter also clear?

^^ I'm going to check these two things and report back here

 

Google tells me this motor should have 170-200psi healthy compression

There is no spark and no fuel during a compression test.. therefore no exhaust

Not leaking oil and not burning oil

Never have heard 195 or 200 psi compression reading being normal on any 2017 4 cylinder basic Elantra.?