What is causing valve train rattle when I first start the engine from cold start

Asked by Jan 29, 2016 at 07:07 PM about the 2006 Toyota Avalon Limited

Question type: Maintenance & Repair

When I first start the engine I hear a loud valve train rattle for about 1 to 2 seconds.  I get this every time the cars sits off for about 3 to 4 hours.  Once on the car is quite and very smooth.  I change the oil religiously every 3K and only use Mobil 1 synthetic.

3 Answers

73,705

There is clearance for the moving parts so when the engine warms up and oil pressure builds up, then the engine quiets down.

76,625

Cam chain rattle until the oil pressure driven tensioner takes up the slack in the chain.

19,800

Try adding some Lucas Engine Oil Stabilizer for synthetic oil. No promises but it my help.

Your Answer

Avalon

Looking for a Used Avalon in your area?

CarGurus has 16,768 nationwide Avalon listings starting at $1,500.

ZIP:

Toyota Avalon Experts

  • #1
    Tom Demyan
    Reputation
    1,790
  • #2
    lilfrosty357
    Reputation
    900
  • #3
    dandyoun
    Reputation
    680
View All

Related Models For Sale

Used Toyota Camry
1,059 Great Deals out of 70,364 listings starting at $295
Used Honda Accord
1,063 Great Deals out of 60,931 listings starting at $999
Used Lexus ES 350
386 Great Deals out of 11,747 listings starting at $4,000
Used Toyota Highlander
438 Great Deals out of 26,772 listings starting at $1,800
Used Toyota Corolla
899 Great Deals out of 56,865 listings starting at $1,099
Used Nissan Maxima
281 Great Deals out of 23,041 listings starting at $899
Used Toyota RAV4
807 Great Deals out of 50,519 listings starting at $1,500
Used Toyota 4Runner
281 Great Deals out of 21,455 listings starting at $1,700
Used Lexus GS 350
142 Great Deals out of 3,322 listings starting at $6,980
Used Chevrolet Impala
509 Great Deals out of 33,699 listings starting at $950
Used Nissan Altima
1,030 Great Deals out of 74,819 listings starting at $1,200
Used Honda Civic
818 Great Deals out of 72,395 listings starting at $1,000
Used Lexus LS 460
83 Great Deals out of 2,663 listings starting at $6,995
Used Lexus RX 350
388 Great Deals out of 19,251 listings starting at $5,750
Used Hyundai Sonata
704 Great Deals out of 49,619 listings starting at $790

Used Cars For Sale

2018 Toyota Avalon Limited For Sale
2,571 listings starting at $35,484
2017 Toyota Avalon Limited For Sale
6 Great Deals out of 419 listings starting at $32,600
2016 Toyota Avalon Limited For Sale
3 Great Deals out of 128 listings starting at $18,224
2015 Toyota Avalon Limited For Sale
8 Great Deals out of 163 listings starting at $19,588
2014 Toyota Avalon Limited For Sale
15 Great Deals out of 242 listings starting at $15,495

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.