"Lifter rattle "

[Kbaker2012]

My engine is completely new and the valves are adjusted to .10 and .012 as to spec but it sounds like they are loose I have gone thru them all twice now and no difference. Any one have any clue as to the rattle ?

[worfdog]

Did you adjust them while the engine was warm? That is how the manual says to do it.

[Festy46]

Mechanical valve lifters are going to make noise. Your engine won't be totally silent like with hydraulic ones. The noise should sound something like the sound a screwdriver would make if you tapped it lightly on the bell housing. Make sure you are adjusting them with the cam lobe at the lowest point for each valve.

[sketchman]

You can do it cold too.

Iron Block Iron Heads Add .002"

Iron Block Aluminum Heads Subtract .006"

Aluminum Block Aluminum Heads Subtract .012"

I do mine this way, and it works just fine.

[Kbaker2012]

I have gone thru it cold and it rattled and got the engine warm and re-adjusted and same sound. Gonna try this
Quote Originally Posted by Crane Cams
Iron Block Iron Heads Add .002"
Iron Block Aluminum Heads Subtract .006"
Aluminum Block Aluminum Heads Subtract .012"

And see if that matters although I have rebuilt numerous engines and never had this happen

[Festy46]

Are you using a cam for mechanical lifters? The profile can be different from hydraulic to mechanical. The hydraulic cam can have "sharper" points on the lobes allowing the valve to snap shut quicker making more noise. I bought a "mechanical lifter conversion kit" years ago for an old Chevy six cylinder that had hydraulic lifters and I could never get it to run as quiet as a stock mechanical lifter engine should.

[sketchman]

Oh, yeah, I should have mentioned that too. Mine do make some noise. They're silent till it starts to warm up then you can hear them a little. I have a hydro cam and mech rockers.

[FestYboy]

carby engines are SUPPOSED to sound like a singer sewing machine, it's normal.

[Kbaker2012]

can I run the Aspire FI rockers on it ? Would that quiet them down ? It does NOT hurt for power or miss just rattles like a Singer sewing machine
I also have the Aspire cam can I put them both in and will it make a difference

[sketchman]

^Yes, you can. If you're carbed you can't use the cam because it doesn't have the fuel pump lobe, but the rockers will work.

I've run Aspire rockers on a stock cam with no issues.

[Jblair]

I adjusted my valves yesterday, i had a really noisy one, when i got done it ran quiter, not silent, when it warmed up you coud hear it pretty well. So you are not alone. Im going to play with different oils until i find one that may help. My motor only has 127k on it also.

[1chrisapple]

20w50 will quite her down lol jk

[Kbaker2012]

I DO RUN 20W50 Syntech

[Team Lightning]

Why are you running 20W50 in a Festiva?

[Kbaker2012]

I live in Arkansas and the temp get hot here and I always let it warm up