KA24DE Head filling with oil - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

SMM · 02-09-2012, 01:34 PM

Long story short. Compression is fine across every cylinder. Tops of pistons are clean (can even see .50 or whatever it says), spark plugs look fine. Car runs as if brand new.

Replaced valve stem seals while I was doing timing chain. Now car is smoking like crazy, gets worse when it reaches operating temperature. Small drops of oil coming out of exhaust.

I noticed the head keeps filling with oil, reference puddles next to shims in the pockets of the head, fills up on top of shims. Assuming oil is leaking down causing it to smoke.

No idea why it is doing this. Any ideas?

slothonaleash · 02-09-2012, 04:02 PM

Are the new valve stem seals properly seated? I'd just have a machine shop do them just because of the margin of error.

SMM · 02-09-2012, 04:35 PM

Yes they were installed correctly.

SMM · 02-09-2012, 09:25 PM

More pictures.:

rcdad123 · 02-09-2012, 10:39 PM

that is normal. oil is supposed to be there to keep everything lubricated. i would check the seals again.

SMM · 02-09-2012, 11:07 PM

^ I have opened up many KA's and never seen that much oil. Yes some, but that is pushing the limit. In my opinion that is a bit excessive.

Intake side is pretty clean.

Side note: Took off valve cover. Cleared that oil out. Put it all together and started the car. It took awhile before it started smoking again, basically until it reached operating temp. I assume it only starts smoking once all that oil piles up.

I guess tomorrow I am going to take everything back off and check each seal.

02-09-2012, 01:34 PM	#1
SMM Zilvia Addict Join Date: Sep 2009 Location: tampa Age: 37 Posts: 819 Trader Rating: (26) Feedback Score: 26 reviews	KA24DE Head filling with oil Long story short. Compression is fine across every cylinder. Tops of pistons are clean (can even see .50 or whatever it says), spark plugs look fine. Car runs as if brand new. Replaced valve stem seals while I was doing timing chain. Now car is smoking like crazy, gets worse when it reaches operating temperature. Small drops of oil coming out of exhaust. I noticed the head keeps filling with oil, reference puddles next to shims in the pockets of the head, fills up on top of shims. Assuming oil is leaking down causing it to smoke. No idea why it is doing this. Any ideas?

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

02-09-2012, 04:02 PM	#2
slothonaleash Zilvia Addict Join Date: Jan 2007 Location: Columbus, Ohio Age: 33 Posts: 745 Trader Rating: (4) Feedback Score: 4 reviews	Are the new valve stem seals properly seated? I'd just have a machine shop do them just because of the margin of error.

02-09-2012, 04:35 PM	#3
SMM Zilvia Addict Join Date: Sep 2009 Location: tampa Age: 37 Posts: 819 Trader Rating: (26) Feedback Score: 26 reviews	Yes they were installed correctly.

02-09-2012, 09:25 PM	#4
SMM Zilvia Addict Join Date: Sep 2009 Location: tampa Age: 37 Posts: 819 Trader Rating: (26) Feedback Score: 26 reviews	More pictures.:

02-09-2012, 10:39 PM	#5
rcdad123 Zilvia Addict Join Date: Jul 2011 Location: san diego Posts: 639 Trader Rating: (0) Feedback Score: 0 reviews	that is normal. oil is supposed to be there to keep everything lubricated. i would check the seals again.

02-09-2012, 11:07 PM	#6
SMM Zilvia Addict Join Date: Sep 2009 Location: tampa Age: 37 Posts: 819 Trader Rating: (26) Feedback Score: 26 reviews	^ I have opened up many KA's and never seen that much oil. Yes some, but that is pushing the limit. In my opinion that is a bit excessive. Intake side is pretty clean. Side note: Took off valve cover. Cleared that oil out. Put it all together and started the car. It took awhile before it started smoking again, basically until it reached operating temp. I assume it only starts smoking once all that oil piles up. I guess tomorrow I am going to take everything back off and check each seal.