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

35,075

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 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Search Toyota Camry Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Toyota Camry Experts

#1 Reelin68
Reelin68
Reputation 11,080
#2 FordNut
FordNut
Reputation 5,560
#3 Tom Demyan
Tom Demyan
Reputation 4,020
View All

Related Models For Sale

Used Honda Accord
1,011 Great Deals out of 75,624 listings starting at $899
Used Toyota Corolla
999 Great Deals out of 68,492 listings starting at $1,595
Used Honda Civic
858 Great Deals out of 70,845 listings starting at $1,200
Used Nissan Altima
1,089 Great Deals out of 83,135 listings starting at $1,600
Used Toyota Avalon
304 Great Deals out of 13,887 listings starting at $2,499
Used Toyota RAV4
760 Great Deals out of 56,009 listings starting at $2,488
Used Hyundai Sonata
704 Great Deals out of 49,234 listings starting at $1,989
Used Nissan Maxima
399 Great Deals out of 24,557 listings starting at $999
Used Toyota Highlander
586 Great Deals out of 23,103 listings starting at $2,944
Used Honda CR-V
894 Great Deals out of 63,713 listings starting at $1,495
Used Toyota Tacoma
721 Great Deals out of 32,217 listings starting at $2,750
Used Toyota Prius
325 Great Deals out of 23,227 listings starting at $1,250
Used Ford Fusion
1,098 Great Deals out of 76,742 listings starting at $999
Used Chevrolet Malibu
1,180 Great Deals out of 83,198 listings starting at $1,800
Used Toyota 4Runner
378 Great Deals out of 20,969 listings starting at $2,495

Used Cars For Sale

2017 Toyota Camry SE For Sale
12 Great Deals out of 21,628 listings starting at $18,299
2016 Toyota Camry SE For Sale
4 Great Deals out of 40 listings starting at $14,994
2015 Toyota Camry SE For Sale
62 Great Deals out of 2,727 listings starting at $10,995
2014 Toyota Camry SE For Sale
124 Great Deals out of 3,032 listings starting at $9,888
2013 Toyota Camry SE For Sale
62 Great Deals out of 1,104 listings starting at $8,888