Recent Topics
Late Christmas Lights Present
by Ducked
06/25/17 10:38 PM
2016 Toyota Avalon XLE Review
by Nick1994
06/25/17 10:06 PM
Is there any benefit to using premium fuel?
by Greatwhite7
06/25/17 09:12 PM
Possible engine damage to Honda Mower?
by blue_steel
06/25/17 09:04 PM
Donaldson P502503 Virgin Powerstroke 6.7
by asleepz
06/25/17 09:02 PM
Honda 15400-PLM-A01 5k miles C&P
by asleepz
06/25/17 08:54 PM
Front Pad replacement interval?
by borgward
06/25/17 07:52 PM
Are these bulbs a waste of money?
by NJ_Car_Owner
06/25/17 07:46 PM
Radiator Stop Leak Recommendation
by Egg_Head
06/25/17 05:51 PM
Dog licking cat food cans
by Donald
06/25/17 05:22 PM
0w20 OR 5W30: nissan maxima 2017
by SDANGERS
06/25/17 04:32 PM
2011 Ford Escape XLT
by Corollaman
06/25/17 03:59 PM
2009 Chevy Traverse opinions
by Corollaman
06/25/17 03:57 PM
Rotella T6 Multi Vehicle 5W 30
by rotorcraft230
06/25/17 03:54 PM
Takata Bankruptcy
by Reggaemon
06/25/17 03:22 PM
Where are you getting UOA's Done?
by Gebo
06/25/17 02:49 PM
Mixing Pennzoil Platinum and Castrol Magnatec.
by GRWOil
06/25/17 02:41 PM
Ford Focus Made In China??????
by AirgunSavant
06/25/17 02:41 PM
Upcoming Civic and 335i BMW maintenance
by Coprolite
06/25/17 02:35 PM
MANN MH 63/1 for BRP 1000R
by OVERKILL
06/25/17 02:19 PM
Newest Members
rottonj, blue_steel, SammyGG, Gojira61, TucsonTacodog
61969 Registered Users
Who's Online
72 registered (901Memphis, Bandito440, 4WD, aquariuscsm, alphadog, 8 invisible), 1886 Guests and 22 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
61969 Members
66 Forums
267044 Topics
4416598 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Page 1 of 2 1 2 >
Topic Options
#2295770 - 06/23/11 12:36 PM Engine Blow By
chevman4life Offline


Registered: 05/18/11
Posts: 217
Loc: TX
Just curious but I heard a lot of people talk about "blow by" in an engine and I understand how it occurs, but what are ways to slow it down? I've heard people say to run 15w40 etc. What are ya'lls thoughts? Or a high Moly oil, which now what Dino oils are high in Moly?
_________________________
1982 Chevy C10, 212k
1988 Buick Estate Wagon
2005 Ford Mustang V6, 139k, Amsoil 10W30
2010 Ram 1500 HEMI, 110k, Amsoil 0W30
2016 Traverse

Top
#2295774 - 06/23/11 12:40 PM Re: Engine Blow By [Re: chevman4life]
kemo Offline


Registered: 03/14/11
Posts: 356
Loc: MN, USA
you can't really "slow it down". At that point, it is time to start looking for a new ride, a new engine, or parts to rebuild it.

But I guess that's just me, I'd rather fix the problem ASAP rather than play the odds that are against me.
_________________________
"I change my oil every 3,000 miles, or whenever I get bored... whichever comes first." - Hank Hill

Top
#2295792 - 06/23/11 01:00 PM Re: Engine Blow By [Re: chevman4life]
chevman4life Offline


Registered: 05/18/11
Posts: 217
Loc: TX
Good point. Some close friends have a 2000 Ford Winstar and at around 150k it started having slight blow by, he was told to try a HM oil and add Lucas Oil Stabilizer. I remember him telling me that he hadn't noticed anymore issues with it, and since then they have put over 50k on it. His wife still drives it everyday with over 200k. I guess it depends on how bad it is.
_________________________
1982 Chevy C10, 212k
1988 Buick Estate Wagon
2005 Ford Mustang V6, 139k, Amsoil 10W30
2010 Ram 1500 HEMI, 110k, Amsoil 0W30
2016 Traverse

Top
#2295799 - 06/23/11 01:04 PM Re: Engine Blow By [Re: chevman4life]
Chris142 Online   content


Registered: 06/05/03
Posts: 15197
Loc: apple valley, ca
All engines have some blow by. As wear increases so does blow by. Using thicker oil wont do much to improve things.
_________________________
02 Wrangler super-s 10w30
87 F250 proline 15w40
04 Tahoe super-s 5w30
Z400 Lucas 10w30
KLR250 Maxima 10w40
Can am maveric edge 5w40

Top
#2295803 - 06/23/11 01:07 PM Re: Engine Blow By [Re: Chris142]
lexus114 Offline


Registered: 05/12/08
Posts: 6221
Loc: Easton, PA
Originally Posted By: Chris142
All engines have some blow by. As wear increases so does blow by. Using thicker oil wont do much to improve things.


It help`s some. Buy`s some time if nothing else.


Edited by lexus114 (06/23/11 01:10 PM)
_________________________
2012 Mercedes-Benz C300 4matic
2015 Lexus RX350 AWD

Top
#2295815 - 06/23/11 01:20 PM Re: Engine Blow By [Re: chevman4life]
JHZR2 Offline



Registered: 12/14/02
Posts: 39887
Loc: New Jersey
Lots of diesels have substantial blowzy and still run well. In a gasser, no such luck. If it's bad, look for a new engine.

Top
#2295829 - 06/23/11 01:41 PM Re: Engine Blow By [Re: chevman4life]
RegDunlop Offline


Registered: 11/12/10
Posts: 249
Loc: NYC NY USA
Can somebody explain "blowby?"

What causes it?

How do you know, what are indications it is occurring?

Top
#2295833 - 06/23/11 01:47 PM Re: Engine Blow By [Re: RegDunlop]
440Magnum Offline


Registered: 02/01/09
Posts: 8579
Loc: Texas
Originally Posted By: RegDunlop
Can somebody explain "blowby?"

What causes it?

How do you know, what are indications it is occurring?



"Blow by" refers to combustion gasses escaping past the rings and into the crankcase. ALL piston engines have blow-by, that's what the PCV valve and plumbing is for- to suck it away and burn it before it creates excessive deposits in the engine (and the EPA likes it because it keeps it out of the air, too).

Blow-by tends to decrease as a new engine breaks in, then slowly increase again as an engine wears out. It is only "excessive" when the volume of blow-by is more than the PCV system can remove. You know this because the engine starts venting vapor out the oil fill hole at idle (a visible grey mist when you run the engine with the oil fill cap off) and/or soaking the air filter with oil mist that gets pushed out the crankcase air inlet pipe that usually attaches to the air intake plumbing.
_________________________
'66 Dodge Polara & '69 Dodge Coronet R/T both 440/727
'08 Ram 1500 4.7/545RFE
'12 Challenger SRT8 392/6-speed
'99 XJ 4x4 4.0/AX15, '14 WK2 4x4 3.6/8HP

Top
#2295853 - 06/23/11 02:21 PM Re: Engine Blow By [Re: chevman4life]
VR1 Offline


Registered: 06/19/11
Posts: 132
Loc: North Texas
like stated above engine is showing its age but, I woudn't run a thicker oil or stabilizers it will not help a thing and actually cause more wear in other parts of your engine like bearings etc. Trying a high mileage is a good choice to help with it some but, use your recomended grade. Thats about all you can do until its rebuild time.
_________________________
People who know use Valvoline

Top
#2295861 - 06/23/11 02:31 PM Re: Engine Blow By [Re: chevman4life]
crw Offline


Registered: 05/31/05
Posts: 1713
Loc: Pocatello, ID
For what it's worth, the 1.5L Mazda I have... we bought it with 147K... some time after that I realize that the engine has significant blow by... But I keep up with it, change the oil and add more when it burns off, the engine is now at 175K and still going fine. Yes, it would have been better if the PO hadn't neglected it, but if I can get it to 200K I'll consider it good.
_________________________
2005 Nissan Maxima, 6-speed manual; many others...

Top
#2295916 - 06/23/11 03:49 PM Re: Engine Blow By [Re: chevman4life]
tig1 Offline


Registered: 01/03/09
Posts: 12397
Loc: Illinois
Excessive blow by can be caused by actual cyl wall and ring wear, or in most cases,I believe, may be caused by ring coking from oil change abuse where the rings coke solid and can't expand to the cyl wall as designed with carbon from oil that is way pasted it prime. Synthetic oil can help prevent this. I have done 10K OCIs for many years and have never experienced ring coking with synthetic oil.
_________________________
2007 Ford Fusion 209,000 miles
M1 0-20 AFE
2017 Ford Fusion 27K
M1 0-20 AFE
10,000 mile OCIs on both engines
M1 ATF
M1 10-30 in all OPE
MC filters


Top
#2296003 - 06/23/11 05:26 PM Re: Engine Blow By [Re: chevman4life]
demarpaint Offline


Registered: 07/03/05
Posts: 27564
Loc: NY
If the rings are sticking and causing the blow-by an engine cleaning product like Kreen "could" help. Please note the word "could" help, MMO "could" as well it just takes longer. When using one of these products just keep on eye on the oil level because it could drop faster with the addition of either product. If the blow-by is caused by wear Schaeffers #132 might help.
_________________________
God Bless Our Troops


Top
#2296212 - 06/23/11 09:18 PM Re: Engine Blow By [Re: 440Magnum]
TFB1 Offline


Registered: 09/03/10
Posts: 3496
Loc: VA
Originally Posted By: 440Magnum
It is only "excessive" when the volume of blow-by is more than the PCV system can remove. You know this because the engine starts venting vapor out the oil fill hole at idle (a visible grey mist when you run the engine with the oil fill cap off) and/or soaking the air filter with oil mist that gets pushed out the crankcase air inlet pipe that usually attaches to the air intake plumbing.


Bingo and even engines with excessive blowby can run tens of thousands miles as long as they are closely maintained... Mainly with this condition it's important to keep the oil fresh, as the blowby will quickly shear the oil and worsen the issue or possibly lead to additional problems... Of course most are going to take the attitude, it already has problems, why bother with a regular OCI...

Top
#2296214 - 06/23/11 09:21 PM Re: Engine Blow By [Re: chevman4life]
hattaresguy Offline


Registered: 06/01/11
Posts: 7180
Loc: CT
It doesn't really mean a whole lot as long as the engine runs well. Their are a lot of low compression older motors out their still chugging along.

Oil has very little to do with it, its wear. The only fix is a rebuild.


Edited by hattaresguy (06/23/11 09:22 PM)

Top
#2296253 - 06/23/11 09:54 PM Re: Engine Blow By [Re: hattaresguy]
SL2 Offline


Registered: 02/19/09
Posts: 458
Loc: Upstate, NY
Originally Posted By: hattaresguy
It doesn't really mean a whole lot as long as the engine runs well. Their are a lot of low compression older motors out their still chugging along.

Oil has very little to do with it, its wear. The only fix is a rebuild.


Such as my 226K mile buick century with its 1/2 shot burnt/chipped valves..
_________________________
13 Optima SXL 2.0 Turbo Synthetic 5W30
02 Regal. 3.8L Series II Blend 10W30

Top
Page 1 of 2 1 2 >