White Smoke and oil in Air filter

debaccos · 09-18-2009, 12:27 PM

Hi, I am having a problem with a Briggs and Stratton twin cylinder engine on a walker mower. I belive it is an 18 hp engine, The motor runns fairly decent, some surging but it is blowing whote smoke but what is more troubling is that the engine is pumping oil up thru the breather into the air filter, I am adding aoil every day and the replacing the filter daily, the whole inside of the air cleaner tray fills with oil. here are the numbers on the engine. 356447-0114-E1 any suggestions will help, thank you

PatG · 09-18-2009, 01:35 PM

Had this happen to me once. It's called, "blow back" and occurs when you have over filled the crankcase. Can this be the reason for you?

debaccos · 09-18-2009, 01:39 PM

No, It has been checked every morning, in fact it blows so much oil It needs to be added every day, but it is definatly not over filled

**wrench97** · 09-18-2009, 02:22 PM

Blowby can also be caused by a failing piston or rings, a compression test will tell the story.

**K-B** · 09-19-2009, 01:10 PM

Check the o-ring in the dipstick seal, replace if damaged

debaccos · 09-20-2009, 08:39 AM

I will do that today, I will also do the compresson check today, What should the compression be on that engine? also, it seems most of the oil is comming from the breather on top of the engine pumping up into the air filter canister, could the breather be bad?

**Basementgeek** · 09-20-2009, 02:12 PM

Yes it can be. Try cleaning it first.

BG

**wrench97** · 09-20-2009, 02:36 PM

Look for a difference from one side to the other, if it is a Piston/Ring problem 1 side will be a lot lower.

debaccos · 09-20-2009, 03:45 PM

this engine is an overhead valve engine if it makes a difference

debaccos · 09-21-2009, 09:40 AM

Ok everyone, I did a compression test and I got 180 lbs in each cylinder, I thought that was high so I went out and bought a brand new compression tester and got the same results, I let it sit and the pressure drop is minimal, like 2 to 3 lbs in like 2 min and as far as the oring on the dip stick there isn't any, it is a plastic ended dipstick that fits tight in the dip stick tube

**Snoopdogie187** · 09-21-2009, 12:14 PM

I'm thinking the breather assembly isn't working as it should be. Sorry, I don't know small engines that well so I can't tell you how to check it or anything, but just wanted to post this just as something to check.

**wrench97** · 09-21-2009, 01:21 PM

180 is good, check the breather.

debaccos · 09-21-2009, 03:15 PM

I am going to pull the engine and reseal the whole thing, should I do head gaskets at the same time? and if so what are the torque spec for the head? and should I just replace the breather while I am at it?

**wrench97** · 09-21-2009, 03:59 PM

Here's a link to the parts illustration/manual, service manual for the torque vaules I could not find.> http://www.briggsandstratton.com/mai...356447-0114-E1

The torque value for case bolts is important also.

Double check that there is not gas mixed with the oil causing the oil to thin out and push out the breather, I would also clean the breather first to be sure it's not plugged causing a over pressurized crankcase.

Joe Shemoe · 11-15-2009, 09:24 PM

Quote:

Originally Posted by PatG

Had this happen to me once. It's called, "blow back" and occurs when you have over filled the crankcase. Can this be the reason for you?

debaccos,

Yeah its called "blow back" this happened to me before. At first I thought is was the air filter itself. I was not able to fix it and thought that I was spending so much time with it and not going nowhere, so I end up buying a new one. Please give me an update and see if I can have the old one up and running again.

Regards,
Joe

09-18-2009, 12:27 PM	#1 (permalink)
debaccos Registered User Join Date: Sep 2009 Posts: 6 OS: Vista	White Smoke and oil in Air filter Hi, I am having a problem with a Briggs and Stratton twin cylinder engine on a walker mower. I belive it is an 18 hp engine, The motor runns fairly decent, some surging but it is blowing whote smoke but what is more troubling is that the engine is pumping oil up thru the breather into the air filter, I am adding aoil every day and the replacing the filter daily, the whole inside of the air cleaner tray fills with oil. here are the numbers on the engine. 356447-0114-E1 any suggestions will help, thank you

09-18-2009, 01:35 PM	#2 (permalink)
PatG Registered User Join Date: Sep 2004 Posts: 20 OS: XP SP3	Re: White Smoke and oil in Air filter Had this happen to me once. It's called, "blow back" and occurs when you have over filled the crankcase. Can this be the reason for you?

09-18-2009, 01:39 PM	#3 (permalink)
debaccos Registered User Join Date: Sep 2009 Posts: 6 OS: Vista	Re: White Smoke and oil in Air filter No, It has been checked every morning, in fact it blows so much oil It needs to be added every day, but it is definatly not over filled

09-18-2009, 02:22 PM	#4 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,527 OS: Win7	Re: White Smoke and oil in Air filter Blowby can also be caused by a failing piston or rings, a compression test will tell the story. __________________ Power Supply and Selection

09-19-2009, 01:10 PM	#5 (permalink)
K-B Moderator, Linux Join Date: Oct 2005 Location: NY Posts: 2,878 OS: Vista, Ubuntu My System	Re: White Smoke and oil in Air filter Check the o-ring in the dipstick seal, replace if damaged __________________

09-20-2009, 08:39 AM	#6 (permalink)
debaccos Registered User Join Date: Sep 2009 Posts: 6 OS: Vista	Re: White Smoke and oil in Air filter I will do that today, I will also do the compresson check today, What should the compression be on that engine? also, it seems most of the oil is comming from the breather on top of the engine pumping up into the air filter canister, could the breather be bad?

09-20-2009, 02:12 PM	#7 (permalink)
Basementgeek Moderator, Home Support Join Date: Feb 2005 Location: Central Ohio, USA Posts: 1,493 OS: XP Pro SP2/Vista Ultimate SP2 Blog Entries: 3	Re: White Smoke and oil in Air filter Yes it can be. Try cleaning it first. BG __________________ Donating to the forum keeps TSF free for all. Proud member of ASAP

09-20-2009, 02:36 PM	#8 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,527 OS: Win7	Re: White Smoke and oil in Air filter Look for a difference from one side to the other, if it is a Piston/Ring problem 1 side will be a lot lower. __________________ Power Supply and Selection

09-20-2009, 03:45 PM	#9 (permalink)
debaccos Registered User Join Date: Sep 2009 Posts: 6 OS: Vista	Re: White Smoke and oil in Air filter this engine is an overhead valve engine if it makes a difference

09-21-2009, 09:40 AM	#10 (permalink)
debaccos Registered User Join Date: Sep 2009 Posts: 6 OS: Vista	Re: White Smoke and oil in Air filter Ok everyone, I did a compression test and I got 180 lbs in each cylinder, I thought that was high so I went out and bought a brand new compression tester and got the same results, I let it sit and the pressure drop is minimal, like 2 to 3 lbs in like 2 min and as far as the oring on the dip stick there isn't any, it is a plastic ended dipstick that fits tight in the dip stick tube

09-21-2009, 12:14 PM	#11 (permalink)
Snoopdogie187 Oh! What shall I be? Join Date: Jun 2002 Posts: 2,540 OS: Vista Home Premium SP1, mom: XP Pro SP2 My System	Re: White Smoke and oil in Air filter I'm thinking the breather assembly isn't working as it should be. Sorry, I don't know small engines that well so I can't tell you how to check it or anything, but just wanted to post this just as something to check. __________________ Infected computer? click here Has TSF Helped You? Posting System Specifications Please Donate to TSF

09-21-2009, 01:21 PM	#12 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,527 OS: Win7	Re: White Smoke and oil in Air filter 180 is good, check the breather. __________________ Power Supply and Selection

09-21-2009, 03:15 PM	#13 (permalink)
debaccos Registered User Join Date: Sep 2009 Posts: 6 OS: Vista	Re: White Smoke and oil in Air filter I am going to pull the engine and reseal the whole thing, should I do head gaskets at the same time? and if so what are the torque spec for the head? and should I just replace the breather while I am at it?

09-21-2009, 03:59 PM	#14 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,527 OS: Win7	Re: White Smoke and oil in Air filter Here's a link to the parts illustration/manual, service manual for the torque vaules I could not find.> http://www.briggsandstratton.com/mai...356447-0114-E1 The torque value for case bolts is important also. Double check that there is not gas mixed with the oil causing the oil to thin out and push out the breather, I would also clean the breather first to be sure it's not plugged causing a over pressurized crankcase. __________________ Power Supply and Selection