i have a raping noise at low, steady rpms sounds like its coming from heads,just replaced valve stem seals any one have an idear what this might be

25

Asked by Jul 02, 2008 at 08:46 PM about the 1987 Chevrolet Camaro Coupe RWD

Question type: Maintenance & Repair

I just did the valve stem seals on my 305,runs great, but I get a rapping noies when I give it a little gas and keep it steady ,rapping noies seems to becoming from one of the heads, any one have an idear what it might be......

12 Answers

155

i have a camaro just like yours and i did alot of stuff with my 305 cause i had some problems with it so finally i took it out and put a 355 in in....what do you mean by rapping noise

try setting your timing back a little,re adjust valves.also you may want to use a heaver oil 10 w 40.

25

I have a friend who has a 305 and his is built up and he is pushing 340 hp his runs strong all the time never seems to have a problem with it.his motor is 3 years old still going strong,when car is sitting in my driveway and i give it a little gas,it sounds fine but when i hold the gas or give it a little more gas it sounds like someone is knocking on the head, something is raping inside the head,even if i put my hand on the head i can feel it.I know if i tightened a valve to tight it would run real crappy,but engine runs great ,could it be the anti knock sensor..its not a ticking sound,

25

i did set it back a bit but noies is still there,i am using 10/40,would it be better to adjust valves with engine running,thats how we did it in the old days.

25

i bought this camaro from a teenage kid with a history of beating cars to death ,when i got the car it was'nt running, the vin number says it an iroc but this car looks nothing like an iroc,no body kit,3rd brake light is on the hatch,front noise is that of the bernet...wheels too...

SOUNDS LIKE YOU HAVE A DEAD LIFTER, YOU MIGHT WANT TO CHECK YOUR OIL PRESSURE, IF YOUR LOISING OIL PRESSURE IT IS MORE THAN LIKELY THE LIFTERS. I HOPE I COULD BE OF SOME HELP.

If your not having overheating issues.. you might want to take a closer look at the mufflers, you could have a loose baffle plate causing the noise at low R.P.M.

25

thank you pressure is low....

25

brand new flowmasters,,,car hasn't left the driveway yet......

25

that might be pinging but i would have to hear it for myself. try lucus octane booster and see if that helps

8,895

Sounds like you've got a valve adjusted too loose... I'd recommend doing it with the engine off simply because I find it easier and it's the way you have to do it on my car... which needs a valve adjustment every 6,000 miles (ouch) Also make sure you don't have any adjusted too tight or you may end up burning the valve. Hope that helps...

25

i have adjusted the valves 3 times still have the noise,

Your Answer

Camaro

Looking for a Used Camaro in your area?

CarGurus has 30,881 nationwide Camaro listings starting at $995.

ZIP:

Chevrolet Camaro Experts

  • #1
    dandyoun
    Reputation
    1,760
  • #2
    carGrrl
    Reputation
    1,220
  • #3
    Tom Demyan
    Reputation
    1,140
View All

Related Models For Sale

Used Ford Mustang
413 Great Deals out of 41,514 listings starting at $1,488
Used Chevrolet Corvette
134 Great Deals out of 16,100 listings starting at $3,000
Used Dodge Charger
440 Great Deals out of 34,714 listings starting at $2,000
Used Ford F-150
3,159 Great Deals out of 223,319 listings starting at $1,000
Used BMW 3 Series
1,081 Great Deals out of 33,041 listings starting at $1,200
Used GMC Sierra 1500
1,219 Great Deals out of 62,852 listings starting at $1,500
Used Jeep Wrangler
474 Great Deals out of 19,757 listings starting at $1,199

Used Cars For Sale

2018 Chevrolet Camaro For Sale
3 Great Deals out of 10,518 listings starting at $19,486
2017 Chevrolet Camaro For Sale
123 Great Deals out of 7,853 listings starting at $17,900
2016 Chevrolet Camaro For Sale
33 Great Deals out of 1,226 listings starting at $16,991
2015 Chevrolet Camaro For Sale
115 Great Deals out of 2,586 listings starting at $11,995
2014 Chevrolet Camaro For Sale
69 Great Deals out of 2,184 listings starting at $11,000

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.