Exhaust sound from oil fill cap (crankcase).

Asked by Nov 23, 2014 at 08:48 PM about the 2007 Toyota Camry SE

Question type: Maintenance & Repair

I have been a heavy equipment mechanic for over 20 years so I am no stranger to
diagnostics. That said, I am trying to figure out this exhaust noise and extreme blowby I
noticed from the oil fill on the head. The car does have 166,000 pampered miles but runs
great. Compression is approx. 175 psi on all four. I does not smoke or burn oil. Could
there be a problem with the EGR valve? No codes... ever. Thanks

1 Answer

41,295

Here is an answer that was posted a few years back to your question: Most engines now days employ an oil return/check valve in the pan that pressurizes the block, including the rocker/cam(app) cover area, and is normal. If you remove the filler cap, engine running, it will do exactly what you describe. If there was that much blow-by, there would be a CEL(app), fouled plugs, and pcv or O2 (app) issues all over the place. Even if there was blow-by, and the pcv valve was bad, removing the oil filler cap, engine off, would instantly relieve the pressure and you would see a lot of oil vapor. That's all. -----

1 of 1 people found this helpful.

Your Answer

Toyota Camry Experts

  • #1
    Reelin68
    Reputation
    13,500
  • #2
    Tom Demyan
    Reputation
    4,630
  • #3
    tenspeed
    Reputation
    3,010
View All

Related Models For Sale

Used Honda Accord
1,080 Great Deals out of 60,842 listings starting at $1,099
Used Toyota Corolla
865 Great Deals out of 55,921 listings starting at $1,488
Used Honda Civic
787 Great Deals out of 72,331 listings starting at $1,350
Used Nissan Altima
948 Great Deals out of 74,668 listings starting at $1,300
Used Toyota Avalon
213 Great Deals out of 16,868 listings starting at $1,988
Used Toyota RAV4
776 Great Deals out of 49,330 listings starting at $1,500
Used Hyundai Sonata
665 Great Deals out of 49,559 listings starting at $500
Used Nissan Maxima
277 Great Deals out of 23,075 listings starting at $799
Used Toyota Highlander
434 Great Deals out of 27,464 listings starting at $1,999
Used Honda CR-V
816 Great Deals out of 53,799 listings starting at $1,750
Used Ford Fusion
1,006 Great Deals out of 70,424 listings starting at $1,500
Used Toyota 4Runner
290 Great Deals out of 21,604 listings starting at $1,750
Used Toyota Tacoma
619 Great Deals out of 42,167 listings starting at $1,500
Used Chevrolet Malibu
1,041 Great Deals out of 70,493 listings starting at $2,499
Used Toyota Prius
312 Great Deals out of 16,807 listings starting at $1,500

Used Cars For Sale

2018 Toyota Camry SE For Sale
8,847 listings starting at $22,336
2017 Toyota Camry SE For Sale
13 Great Deals out of 2,625 listings starting at $13,991
2016 Toyota Camry SE For Sale
29 Great Deals out of 2,509 listings starting at $9,995
2015 Toyota Camry SE For Sale
41 Great Deals out of 2,033 listings starting at $9,889
2014 Toyota Camry SE For Sale
99 Great Deals out of 2,681 listings starting at $8,987

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.