Swapped a xr259hr cam in my 68 c10 with a 5.3.

And im having a whistling noise when you rev the motor or are driving down the road it gets louder with rpms.

It still does it in neutral.

It still does it with the belt removed also.

Its been a while since ive had a hotrod or a cam in something so could it be just the hardened valve train noise? I have the sewing machine noise that i was expecting but this is more of a whistle.

Thanks for any help.

 

seems to be a common problem with comp cams.
https://ls1tech.com/forums/generatio...am-change.html

 

Oh gosh, shoot me...

 

sure its not just a since-u-was problem .

since you was in there now you happen to have a vac leak on the intake gaskets ?

just another idea to check . ya never know .

 

Im going to do the intake gaskets to see if thats it but i really doubt it as they werent touched

 

you don't need to do them .

search on how to check leaking intake gasket with propane bottle.

if found bad then change them .

 

Well it is possible as everyone in the other thread says it does it more over 2k rpms where mine does it at idle and at every rpm.

Tryin to be optimistic... Lol

 

If it runs good, turn the radio up.

 

as a mechanic I love customers like this

 

My bet is that it is a vacuum leak...

Andrew

 

Is it a whistle or a whine? Whistle is air noise. Whine is mechanical.

 

Really sounds more like a whine to me

 

Take a video. I have the same problem as do others in that thread.

Here is Colt's new video, he just swapped his


Here are mine



I wonder if all the cores come from the same vendor.

 

all of us that have this whining issue need to send these threads to comp cams and see what they say, bc it is definitely not a isolated incident.

 

dam

makes me NOT wana do a cam swap any time soon .

I have noticed a huge trend in the aftermarket world these last few years .

" its not our problem we have never had 1 person complain " BULL FU*KIN **** A$$ HOLES

hundreds of thousands of manufactured parts and not 1 dam bad parts

get a life and work with us . not everyone on the other end of your phone is a total stupid a$$

just over 1 month ago I had a bad part in a brand new $2900.00 aftermarket kit . back and forth and finaly the tech guy sent me another replacement item . and what do you think happened ? ? ? it fit like a glove and no more problems . the place still never come out and said it was a bad item and it was there problem . ha ha ha ha ha

 

Im thinking of pulling the heads and changing the lifters to see if that helps, because my cam was used, and the guy I got it from swears he never had any whining noise from it. So im thinking maybe a lifter got spun around and isn't sitting right.

Might can talk the wife into some CNC'd heads too! just tell her it might help..

 

in.....

 

Here is my video