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10-13-2005, 11:30 PM
#1
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I just put in a brand new 402 low compression motor, stage 2 heads, 918 springs, turbo cam,high flow oil pump, long tubes. Now the question I have is I hear a little ticking sounds or chatter at idle and while driving. Now its not teribly loud and the guys who built it said it was normal because of the cam and the valvue springs. I'm use to have a quiet stock motor so I don't know if it is a bad sound or not?? Is it true that you get these noises when you upgrade these things 
10-14-2005, 04:00 AM
#3
You will get increased noise from the valvetrain with a larger cam and stiffer springs. However, it should not be insanely loud. Usually ticking from the engine is one of a couple things: pistons hitting valves (cam installed with timing off), rockers not torqued down tight enough, or the infamous piston slap (which is often interpreted as valve train noise but in fact is not). If it is a faint ticking it could also be AIR check valve that's bad. Could be a number of things, try and narrow it down some more.
10-15-2005, 02:04 AM
#5
TECH Senior Member
With faster ramps, there will be an increase in valve clatering (sewing machine). That is more pronounced with stock, non adjustable rockers.
Aftermarket adjustable rockers will quiet things down provided proper lifter preload is on the ball.
Aftermarket adjustable rockers will quiet things down provided proper lifter preload is on the ball.
