just got my ITR cams,springs and retainers done today. has a "spooling" sound when i accelerate -decellerate.. what's this i hear?? it's in the head..or possibly the timeng belt..but DEFINATLY sounds like it's under the valve cover... help me out guys.

thanks,darrin

 

adj cam gears? have seen aem gears rubbing the back side cover. belt too tight? start there.

 

runnin stock cam gears -sounds just like turbo spooling.

 

you may have the belt too tight. did you remove the belt completely? remove the belt guide under the crank pulley? make sure it is there or the belt will walk rubbing on the front cover and check to see if the belt is too tight.

 

Did you replace the lost motion assemblies with ITR ones? If not you made a boo boo. The ITR ones are slightly shorter. Also check the obvious stuff like belt tension and clearance of the belt and covers.


[Modified by FULLTHROTTLE, 10:03 PM 3/21/2003]

 

sounds like timing belt could be too tight. retension it.

 

back off the T-belt tension George Jetson! it needs deflection to work properly. the inside of a 10-12mm wrench between the cams should be the estimated belt deflection... yes thats in one direction, also do this when the motor is COLD. Keep this in mind... the motor GROWS when its cold and warms up Hence it will get tighter as the car warms up if set when cold... so dont tension it when the motor is hot. if you do so you have to know what you are doing. chances are if your T-belt sounds like a guitar string at TDC on the thrust side of the belt, its too tight.



[Modified by MikeSarr_GSR, 6:54 AM 3/22/2003]

 

its a turbo. adding cams madeyour car have a turbo. just how it works folks.

 

no it's not turbo, does sound Exactly like a spoolin sound though.. -checked tension on timing belt -still not fixed sound yet.when i added my header a while back, i got this sound at the 1st 2 minutes of start up -now with R cams -its all the time, could it just be the added air flowing?

 

yikes I wish I could buy a turbo cam and run 9s y0

 

funny my car is stock...well atleast from the outside of the engine it is stock i never opened up the valve cover yet...but anyway when its a lil cold out my car makes that same sound for like the first 10 15 minutes of driving...at about 3 3500 rpm it makes that turbo sound..i have no clue what it is but now that the weather is warmer it doesnt do it anymore...any ideas what it may be...a drive belt to tight?
thanks....

 

Can you please explain what are the lost motion assemblies are, and what they do? Ive read about replacing camshafts and Ive never heard them mentioned. Even the c-speedracing.com how-to doesnt mention it. tia


[Modified by tilt, 10:23 AM 3/25/2003]

 

They are basically little springs that keep tension on the VTEC rocker assembly when its not in use. they keep the center rocker from flopping around at will and help align the rockers when teh VTEC plunger begins to lock them together.
If you have a LMA that is too long it will bottom out when the rocker swings past it putting tension on the rocker, LMA and Cam. Sometimes with the use of high lift cams the (i.e. todas and such) the tension on this LMA is so great it will begin to stress crack things like cams and rockers.

 

so my ITR cam'd gsr should be OK with stock lma's?

 

Not sure, they are different sizes. I only have had experience with aftermarket cams causing the failures. Anyone else got any insight to this one?

 

Fullthrottle: What do you think could be the cause of a metallic clanking sound in the engine bay at low speeds after a cam install?

 

My guess would be valve adjustment, but without hearing it I couldnt say for sure.

 

I am running CTR cams with stock b16 LMS and Typer R springs and have no problems. I would think it might be timming belt to tight or cam gears rubbing.

 

I have the exact same problem. When engine is cold is a whining sound but goes away 5-10 min after starup. Anyone know what this can be?

 

can anyone answer this?

 

retenstioned the belt -still there..

 

Wooo WOOO maybe its your whistle tips??

 

whistle tips...ok..

 

its the timing belt, is the timing cover off? that would explain it

 

haven't pulled the valve cover yet..had the belt retenstioned and everything looks good on the outside though..