Noise Question -- The solution - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Bernie** · 03-26-2006, 09:44 PM

A few weeks back I posted a question about a loud sheet metal like noise when I ran my truck. I had put my motor, crate with about 5000 miles on it, into my new truck. I had changed the frame, cab, bed and transmission, all sorts of stuff. All of the replies that I got were good ideas that could have been the answer, but weren't. This afternoon I found the problem. My old truck had been 2 wd with a TH 350 transmission. I went to a 4wd with a 4 speed manual. I had replaced the flex plate with a flywheel. It seems that when I bolted the flywheel to the crankshaft the bolts were a bit too long, like 3/32, and where they protruded through the bottom of the crankshaft they touched the piece of sheet metal through which the starter motor goes. It only pressed against them when the flywheel cover was bolted down. I was really pleased to have found it and wanted to share my success. I am, at present, enjoying a beer.

matthufham · 03-26-2006, 09:59 PM

sweet, so no noise, no problems now right?

71chevytruckguy · 03-26-2006, 10:01 PM

always a relief to find the cause of ur problem. chris.

03-26-2006, 09:44 PM	#1
Bernie Senior Member Join Date: Jan 2001 Location: Northern Illinois Posts: 516	Noise Question -- The solution A few weeks back I posted a question about a loud sheet metal like noise when I ran my truck. I had put my motor, crate with about 5000 miles on it, into my new truck. I had changed the frame, cab, bed and transmission, all sorts of stuff. All of the replies that I got were good ideas that could have been the answer, but weren't. This afternoon I found the problem. My old truck had been 2 wd with a TH 350 transmission. I went to a 4wd with a 4 speed manual. I had replaced the flex plate with a flywheel. It seems that when I bolted the flywheel to the crankshaft the bolts were a bit too long, like 3/32, and where they protruded through the bottom of the crankshaft they touched the piece of sheet metal through which the starter motor goes. It only pressed against them when the flywheel cover was bolted down. I was really pleased to have found it and wanted to share my success. I am, at present, enjoying a beer. __________________ Bernie

03-26-2006, 09:59 PM	#2
matthufham Registered User Join Date: Feb 2005 Location: Carl Junction, Missouri Posts: 2,061	Re: Noise Question -- The solution sweet, so no noise, no problems now right?

03-26-2006, 10:01 PM	#3
71chevytruckguy Registered User Join Date: Jul 2005 Location: Kernersville, NC Posts: 599	Re: Noise Question -- The solution always a relief to find the cause of ur problem. chris. __________________ its a work in progess. 71 c-10 lwb, in the middle of frame off restoration. 69 c-10 swb, drag truck, 406 sbc, balanced, comp 292 cam, ported, polished, gasket matched, and bowl blended pro comp 210cc heads, 2.02/1.60 ferrea valves,1.6 roller rockers, re curved hei with msd 6al box, 2-step rev limter, accel 300+ wires, ported victor jr intake, holley 750 double pumper carb, dynomax 1 5/8 headers, 4 spd munci m-20 with super case and iron midplate, mr. gasket vertigate shifter, 5.38 pro gears with full spool, 33 spline moser axles and c-clip elimators, line-loc, 5 gal fuel cell, holley blue pump. 7.807 @ 88.37mph 1.60 60FT 80 g-20 van, tow rig, cammed 305, th350, 10 bolt 88 jeep wrangler, dd, 258, ax-15 swap, 4.5" lift, 33x12.50's, lockers, 3.55's



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