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My Honda Accord...major blowby..or..? (vid inside) #4670462
02/19/18 06:06 AM
02/19/18 06:06 AM
Joined: Jul 2007
Posts: 219
NY
TurboTravis Offline OP
TurboTravis  Offline OP
Joined: Jul 2007
Posts: 219
NY
This is my 2000 Honda Accord 'beater' car. The compression, and more importantly, leakdown numbers are excellent-leakdown was less than 10% on all cylinders. However, it blows a massive amount of air from the oil fill. If you can't tell what I am doing in the video, it's holding a paper towel against the bottom of the hood! LOL! (some swearing in the vid, originally made it to show a good friend). I have no idea what is causing this. PCV system is working properly. Take a guess, if it's something I can look at without tearing it apart too much, I will.

Honda

Re: My Honda Accord...major blowby..or..? (vid inside) [Re: TurboTravis] #4670470
02/19/18 06:49 AM
02/19/18 06:49 AM
Joined: Mar 2013
Posts: 4,754
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 4,754
The Midwest
Really make sure the PCV is up to snuff and the air filter is clean. I suspect you used a junk leak down tester. There are a bunch of junk tools on the market. You need to attach high pressure supplied air to the cylinder through the spark plug hole and than take the oil cap off. Make sure the cylinder your testing is on the the compression stroke. While your at it, listen through the exhaust, open the radiator cap and if you hear air or see bubbles.... .
The engine could run good for another 100K miles+ that, who knows.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: My Honda Accord...major blowby..or..? (vid inside) [Re: skyactiv] #4670485
02/19/18 07:30 AM
02/19/18 07:30 AM
Joined: Jul 2007
Posts: 219
NY
TurboTravis Offline OP
TurboTravis  Offline OP
Joined: Jul 2007
Posts: 219
NY
Originally Posted By: skyactiv
Really make sure the PCV is up to snuff and the air filter is clean. I suspect you used a junk leak down tester. There are a bunch of junk tools on the market. You need to attach high pressure supplied air to the cylinder through the spark plug hole and than take the oil cap off. Make sure the cylinder your testing is on the the compression stroke. While your at it, listen through the exhaust, open the radiator cap and if you hear air or see bubbles.... .
The engine could run good for another 100K miles+ that, who knows.


I know how to do a leakdown test and have the proper tools to perform them. In fact, I have tools for performing a leakdown test that most do not (screw in whistle for indicating compression stroke, spring loaded screw in TDC indicator, etc). With that said, I may change out the actual pressure gauges (or swap them around at least) on my tester just to ensure the equipment is in good operating condition.

Re: My Honda Accord...major blowby..or..? (vid inside) [Re: TurboTravis] #4670492
02/19/18 07:41 AM
02/19/18 07:41 AM
Joined: Mar 2013
Posts: 4,754
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 4,754
The Midwest
I would just keep driving it and not worry about it if it drives good and doesn't belch out smoke.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: My Honda Accord...major blowby..or..? (vid inside) [Re: skyactiv] #4670502
02/19/18 07:57 AM
02/19/18 07:57 AM
Joined: Jul 2007
Posts: 219
NY
TurboTravis Offline OP
TurboTravis  Offline OP
Joined: Jul 2007
Posts: 219
NY
Originally Posted By: skyactiv
I would just keep driving it and not worry about it if it drives good and doesn't belch out smoke.



I agree on all counts! Not worried at all, it's just fun to try to figure it out (without tearing anything apart besides normal service procedures).

Re: My Honda Accord...major blowby..or..? (vid inside) [Re: TurboTravis] #4670506
02/19/18 08:12 AM
02/19/18 08:12 AM
Joined: Sep 2016
Posts: 156
MN
Tman220 Offline
Tman220  Offline
Joined: Sep 2016
Posts: 156
MN
Most inline 4 cylinders will pulse an alarming amount of air out of the fill cap when running. This is usually normal and nothing to be worried about if it's not displaying any other indications of engine issues.

I'll bet if everyone on this forum pulls the oil cap off their inline 4 cylinder engine while its running will find there is a lot of pulsating air escaping. Stop worrying.


2012 Regal GS Turbo PP 5w30
1994 Camaro Z28 LT1 355 CI, 430 RWHP PP 5W30
Re: My Honda Accord...major blowby..or..? (vid inside) [Re: TurboTravis] #4670532
02/19/18 08:50 AM
02/19/18 08:50 AM
Joined: Oct 2004
Posts: 7,955
Cincinnati, OH, USA
bullwinkle Offline
bullwinkle  Offline
Joined: Oct 2004
Posts: 7,955
Cincinnati, OH, USA
How's the oil burning? If it's not spewing blue clouds all over the place, I wouldn't worry about it too much. If it was really bad, it would be puffing out clouds of smoke out of the oil fill like a steam engine!


06 Ram 3500 CTD 4X4(FG Venturi), 93 GMC C3500 6.2, 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 18 Transit 3.7, 03 Merc Grand Marquis 4.6 2V(XG2)
Re: My Honda Accord...major blowby..or..? (vid inside) [Re: TurboTravis] #4670587
02/19/18 09:26 AM
02/19/18 09:26 AM
Joined: Oct 2014
Posts: 11,816
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,816
Idaho
A TDC whistle !!!


"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf
Re: My Honda Accord...major blowby..or..? (vid inside) [Re: TurboTravis] #4670686
02/19/18 10:53 AM
02/19/18 10:53 AM
Joined: Sep 2004
Posts: 7,510
Marshfield , MA
andyd Offline
andyd  Offline
Joined: Sep 2004
Posts: 7,510
Marshfield , MA
Coupla times I have forgotten to put the filler cap back on. It takes only a 100 miles to trip the low oil level light. A qt low. OHCs thrash oil compared to rocker arms


'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: My Honda Accord...major blowby..or..? (vid inside) [Re: TurboTravis] #4670868
02/19/18 01:43 PM
02/19/18 01:43 PM
Joined: Dec 2014
Posts: 189
USA
dbias Offline
dbias  Offline
Joined: Dec 2014
Posts: 189
USA
Most 4 cylinders do blow air from the oil fill hole. Nothing wrong at all. Nature of the beast.


2011 VW JETTA Castrol Edge 0W-40
2012 FORD TRANSIT CONNECT Castrol Edge 5W-20
2016 HONDA CIVIC COUPE Castrol Edge 0W-20
2017 AUDI A4 Ravenol SSL 0W-40
Re: My Honda Accord...major blowby..or..? (vid inside) [Re: Tman220] #4670871
02/19/18 01:44 PM
02/19/18 01:44 PM
Joined: Dec 2014
Posts: 189
USA
dbias Offline
dbias  Offline
Joined: Dec 2014
Posts: 189
USA
Originally Posted By: Tman220
Most inline 4 cylinders will pulse an alarming amount of air out of the fill cap when running. This is usually normal and nothing to be worried about if it's not displaying any other indications of engine issues.

I'll bet if everyone on this forum pulls the oil cap off their inline 4 cylinder engine while its running will find there is a lot of pulsating air escaping. Stop worrying.



Sorry for my post....you beat me too it.


2011 VW JETTA Castrol Edge 0W-40
2012 FORD TRANSIT CONNECT Castrol Edge 5W-20
2016 HONDA CIVIC COUPE Castrol Edge 0W-20
2017 AUDI A4 Ravenol SSL 0W-40
Re: My Honda Accord...major blowby..or..? (vid inside) [Re: TurboTravis] #4670986
02/19/18 03:38 PM
02/19/18 03:38 PM
Joined: Feb 2011
Posts: 6,718
Hudson, NH
LeakySeals Online content
LeakySeals  Online Content
Joined: Feb 2011
Posts: 6,718
Hudson, NH
So.. you performed the leakdown test with the cap off?


06 Escalade 6.0L LQ9 AWD 165k M1 5w30
03 Maxima 3.5L POS 152k ST HM 10w30
Re: My Honda Accord...major blowby..or..? (vid inside) [Re: TurboTravis] #4671310
02/19/18 08:27 PM
02/19/18 08:27 PM
Joined: Feb 2005
Posts: 1,771
Arizona
bulwnkl Offline
bulwnkl  Offline
Joined: Feb 2005
Posts: 1,771
Arizona
Curious: If you are confident of the leakdown test, what is the mechanism you propose which explains the "massive amount of air" expelled through the filler cap?

Re: My Honda Accord...major blowby..or..? (vid inside) [Re: TurboTravis] #4671514
02/20/18 03:27 AM
02/20/18 03:27 AM
Joined: Oct 2015
Posts: 2,648
Balearic Islands , Spain
FordCapriDriver Offline
FordCapriDriver  Offline
Joined: Oct 2015
Posts: 2,648
Balearic Islands , Spain
All, all the 4 cylinders i've had blow quite a bit air from the fill hole with the engine running, including my recently acquired Escort, don't know why, my other V6 engined Ford doesn't blow any at all.

I made this video last week, engine running hot, you can see the oil mist and air escaping through the fill hole in the video, excuse the valvetrain noise, Ford CVH engines tend to have worn cams and lifters and this is not an exception, runs great though smile

https://www.youtube.com/watch?v=PjL2VCbH5rU


1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50 w/ 20% Rimula R4X 15W-40 HDEO.

1988 Ford Escort Mk4 Xr3i Cabrio, - Shell Rimula R4X 15W-40, w/ 30% Helix 3 20W-50.
Re: My Honda Accord...major blowby..or..? (vid inside) [Re: TurboTravis] #4671742
02/20/18 11:05 AM
02/20/18 11:05 AM
Joined: Dec 2006
Posts: 7,633
Toronto, Canada
KrisZ Online happy
KrisZ  Online Happy
Joined: Dec 2006
Posts: 7,633
Toronto, Canada
Is there any type of rocker cover vent tube on this engine or just the PCV?

This might indicate a couple of tight valves. They probably seal ok exactly at TDC, but start to open/close prematurely.


2015 Dodge Grand Caravan-27k miles.
2006 Mazda 3-163k miles
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