#62692, ""that" camshaft noise, "that" other noise..."
that noise that sounds like a knocking/rattling noise under the valve cover... I thought it might've been the lifters, but the sound's the same if the engine is ice cold or hot. anyways, should I get that noise (normally) with crane #12s? also, what could cause a FF-ff-ff noise at the head of the engine? I'm starting to wonder if something's not right after the cams were installed and had ~800 miles to settle in. that tiny door piece on the timing belt cover has to be left off, otherwise my fidanza gears are whacking it... that was a dreadful noise.
anyways, input on what these noises are would be appreciated.
with my setup, i have upgraded valves and springs, but not lashers or cams. since the lashers aren't upgraded they make a slight knocking noise because they are trying to keep up with the other upgraded parts.
I have the Crane #14 cams with AEM cam gears, lash adjusters, rollers, rockers, etc and I notice that I have a noise similar to what you are talking about. Either hot or cold it makes the noise and sometimes its not as noticable as others. I hope its normal.
Yep i have the same dam noise.. i run crane #14 upgraded everything and oversized valves.. im thinkin ths sound is from the upgraded springs makin the valves close harder but i dunno its a dumb idea
As far as I know, it's the rockers making the mild rattle/lifter tap. Mustangs with the roller rockers were notorious for it as well. Mine did the same thing, just like said above, sometimes it was worse than others.
~Luke Facebook 1969 Cougar - 11.91 - 380HP 2007 GSXR 750 1999 OZ - SOLD - 15.26 NA - 14.71 on 75 shot
#80578, "RE: "that" camshaft noise, "that" other noise..." In response to Reply # 0
Originally posted by robinj that noise that sounds like a knocking/rattling noise under the valve cover... I thought it might've been the lifters, but the sound's the same if the engine is ice cold or hot. anyways, should I get that noise (normally) with crane #12s?
That is the sound of worn lifters. I had the same problem a while ago. No matter if it was hot or cold there was just alot of rattling goin on. I replaced the lifters and all was quiet. It seems to be a common problem with our engine. Eaton makes an upgraded lifter - the PT style lifter. Thats what I'm using and they're good. You shouldn't get that noise no matter what cams you have. I have Gude cams.
Originally posted by robinj also, what could cause a FF-ff-ff noise at the head of the engine?
I don't know what that is. What I do to track down these kinds of noises is use a tube as a stethascope and probe all around the engine. Just make sure the side you stick into your ear is clean.
