Sounds of Silence (Not)

[Got the Bug]

zzmac,

I also have a Roush 402.

If you're running a chrome alternator, chances are the pulley is chrome. You might want to try ruffing up the V groove of the pulley with a little light sand paper. The other thing you can try, is to remove the coil wire and have someone turn over the motor while you run a small wire brush over the belt to remove any glazing.

The other thing to look at with the alternator, is the clearance between the alt fan blades and the body. It would have been a nice touch if SPF would have put a little indentation in the engine compartment to accommodate the low alternator. I've got the smallest belt possible (as tight as possible) and it still has (over time) grazed the side of the engine compartment.

The fans may automatically come on if the engine hits temp, so maybe you're hearing them cycle on and off. May not be the whirring noise...just a guess.

About the ticking noise. If you get a chance, see if you can compare the noises you're hearing to someone else's Roush 402 or 427. I had an exhaust leak and it was so loud that I thought I'd broken a rocker. The clicking that you're hearing may just be normal sounds from the valve train.

Best bet maybe to take a ride in another SPF that has a similar set up.

[Silverback51]

Take the belt off and start it up.

[zzmac]

Thanks for some good suggestions guys.

I'll recheck the alternator pulley and the belt.

The whirring/spinning sound seems to be coming from the clutch area, somewhere under the shifter.

I'll check the suggestions for possible exhaust leaks. I just read on another forum that roller engines like this inherently make the ticking noise. If no exhaust leaks maybe everything's fine? I actually like the ticking sound if it's supposed to be normal.

[DAVID GAGNARD]

Solid roller cams will tick or be "noisy" under the hood, if your motor has a hydraulic roller cam, there should be no ticking or noise per se on the top end of the motor, unless there is a very loose rocker arm. If the rocker arm was not adjusted correctly or has lost it's adjustment, then it may have "clearance" between the roller tip and the valve, which it should not........

With the engine idling and the ticking noise going on, you should be able to at least determine which side of the motor it's coming from and start from there......

My bet is on an exhaust leak,either the header itself or the gasket....

David

[zzmac]

Re- 2-3 Short screeching noises when starting engine.

I thought it might have been the alt blades when the engine twisted a bit but it would happen all the time if that was the case. Besides the body of the alternator rests against the fenderwell when tight keeping the blades away from hitting (close though).

I haven't had a lot of time yet to play around with this much. But I loosened the belt just a touch to see what happens and it started screeching like a sumabitzch. So I took the belt off and I lightly removed the glaze from the belt with my dremel and put it back on as tight as I could and got the 2-3 short screeches again. I'm guessing that the screeching noise is coming from the belt slipping a little bit for a few seconds until it catches?? Otherwise it's a little puzzling why it just stops and doesn't do it when I start the engine after it's warmed up. Does anyone have a part number for a shorter belt that will fit? Does a narrower belt matter or just a slightly shorter one that I can tighten a little better? Thx

Originally Posted by Got the Bug

zzmac,

I also have a Roush 402.

If you're running a chrome alternator, chances are the pulley is chrome. You might want to try ruffing up the V groove of the pulley with a little light sand paper. The other thing you can try, is to remove the coil wire and have someone turn over the motor while you run a small wire brush over the belt to remove any glazing.

The other thing to look at with the alternator, is the clearance between the alt fan blades and the body. It would have been a nice touch if SPF would have put a little indentation in the engine compartment to accommodate the low alternator. I've got the smallest belt possible (as tight as possible) and it still has (over time) grazed the side of the engine compartment.

The fans may automatically come on if the engine hits temp, so maybe you're hearing them cycle on and off. May not be the whirring noise...just a guess.

About the ticking noise. If you get a chance, see if you can compare the noises you're hearing to someone else's Roush 402 or 427. I had an exhaust leak and it was so loud that I thought I'd broken a rocker. The clicking that you're hearing may just be normal sounds from the valve train.

Best bet maybe to take a ride in another SPF that has a similar set up.