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Old 07-05-2012, 10:43 PM
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hollow-grinding/ticking noise while motor is loading up

in my baby footed nature, when i drive my truck and give it average-goe acceleration, theres a very hollow-grinding-ticking noice thats comming from the engine bay. i know its not the tranny but ive been noticing that the noise goes away when i the motor reaches higher rpm and the truck reaches a higher mph ( crusing along )< motor isnt working


the only reference i can give as far as noise goes, is holding a piece of thin tin to the spokes of a bike tire rotating really fast =P

i have to assume that theres something touching a rotating object down in the engine bay ( flex plate/starter ) idk...

any help or advice as to what to check would be great, im not sure how else to see the issue besides laying underneath the truck in the dark or light and do a breakstand till it grinds <<<< if i hold my foot on the brake and load the motor up ( the motor starts to shift to the side ) i can make the noise occur

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Old 07-06-2012, 06:54 AM
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It could be just that the fan hitting the shroud. You said the motor shifted so it could be a bad motor mount. Putting it in gear and putting your foot on the brake check to see if the motor lifts, if it does in forward or reverse then bad mount but be careful to hold that brake tight!
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Old 07-06-2012, 08:38 AM
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cool !

ill check that out this weekend. i should mention that my shroud isnt a chevy one, its a wierd *** one off a very old ford or something,i guess when u cram a 454 in a 350 hole you have to compromise, i just hope i never have to replace it because i have no idea wtf it is.

do motor mounts go by year or size or both ? the truck was a 1980/350 but its got a 85 454 in it =P
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Old 07-07-2012, 06:04 PM
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The best way to find out exactly what the mount is would be to take it with you to the auto parts store when you buy the new one.
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Old 07-07-2012, 06:37 PM
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This might sound crazy, and maybe it is ...
But check for an exhaust manifold crack or gasket leak.

It's amazing what the human mind can imagine a noise to be.
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Old 07-07-2012, 06:48 PM
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Quote:
Originally Posted by LEROYDOZOIS View Post
ill check that out this weekend. i should mention that my shroud isnt a chevy one, its a wierd *** one off a very old ford or something,i guess when u cram a 454 in a 350 hole you have to compromise, i just hope i never have to replace it because i have no idea wtf it is.

do motor mounts go by year or size or both ? the truck was a 1980/350 but its got a 85 454 in it =P

NAPA Balkamp #602-1251
75-86 454 in C10-30 pickups


NAPA Balkamp #602-1179
Similar models with 6-cyl and small-blocks.
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Old 07-08-2012, 07:46 AM
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Cracked flexplate could be warping under load.




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