Name that noise... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Chrispbrown36 · 03-25-2015, 07:29 AM

Yesterday, with the wonderful weather we are having, I was cruising with the windows down and the noise seemed to have been coming from everywhere!
First, I have a slight tick when accelerating. I don't have a tach but if I had to guess it is probably around 3000 RPM and continues until I let off the gas. I am burning oil but never let it get too low. I have read everything from flexplate to exhaust leaks could be causing it.....where should I start looking? I have plans to pull the exhaust manifold and make sure all is well in that department. Also, I am planning on replacing the intake manifold gasket, valve cover gasket and distributor gasket in an attempt to get a handle on an oil leak.....should I be looking for anything while I have all this apart?
Second, when slowing down I hear a rubbing sound. It typically starts when I am slowing down and continues until just before I come to a complete stop. Brakes are my first thought here, but I had them service back during the last big snow we had a few weeks back and all was well. To be honest, I can't say whether or not it does it all the time because between the slightly loud exhaust and the sound of the mud terrain tires on the pavement plus my less than stellar hearing it could be drowned out the rest of the time.
This one isn't so much a noise as it is just plain annoying. When I start her up she runs a little rough and if I put her in reverse and back up she will idle real low and sometimes die. It doesn't happen much in drive. but everytime in reverse. It also doesn't seem to happen when I have been driving it for a while and park it then start it back up. Any ideas?

86c20 · 03-25-2015, 10:57 AM

part 2 is she is cold and a old ***** lol. the noise could be anything i would start with having some one with good hearing list to her siting there andsee if they can hear it. could be a lifter going out. have that on mine. light load i get the tap. and now i have a exhaust leak to under full load

Bigstevex4 · 03-25-2015, 11:03 AM

Next time needs aquart oil put in a quart marvels Myestery oil. Stuff is amazing with old eng. mine was burning a quart a week now it a month lifters realy quieted down. even had an eratic oil psi must have cleaned out the sender its perfict now!

craig113 · 03-26-2015, 12:54 AM

the tick to a rumble could be a u-joint starting to go out.

tucsonjwt · 03-26-2015, 09:18 AM

Noises can transmit in odd places. I had the same noise and it went away when I had the clutch replaced recently. Had broken retainer in clutch fork, resurfaced flywheel, clutch kit, input shaft and bearing repair kit, etc. I would have sworn it was an exhaust leak.

Chrispbrown36 · 03-26-2015, 12:42 PM

While pulling the exhaust manifolds off I discovered that one of the heat shields were loose and rattled around. So I am thinking this could definitely be causing some noise I am hearing while driving....right now the truck is down I have it stripped down to replace gaskets and the rain started, so it's going to be a while before I can see if anything has improved.

03-25-2015, 07:29 AM	#1
Chrispbrown36 Registered User Join Date: Apr 2014 Location: Cunningham, KY Posts: 351	Name that noise... Yesterday, with the wonderful weather we are having, I was cruising with the windows down and the noise seemed to have been coming from everywhere! First, I have a slight tick when accelerating. I don't have a tach but if I had to guess it is probably around 3000 RPM and continues until I let off the gas. I am burning oil but never let it get too low. I have read everything from flexplate to exhaust leaks could be causing it.....where should I start looking? I have plans to pull the exhaust manifold and make sure all is well in that department. Also, I am planning on replacing the intake manifold gasket, valve cover gasket and distributor gasket in an attempt to get a handle on an oil leak.....should I be looking for anything while I have all this apart? Second, when slowing down I hear a rubbing sound. It typically starts when I am slowing down and continues until just before I come to a complete stop. Brakes are my first thought here, but I had them service back during the last big snow we had a few weeks back and all was well. To be honest, I can't say whether or not it does it all the time because between the slightly loud exhaust and the sound of the mud terrain tires on the pavement plus my less than stellar hearing it could be drowned out the rest of the time. This one isn't so much a noise as it is just plain annoying. When I start her up she runs a little rough and if I put her in reverse and back up she will idle real low and sometimes die. It doesn't happen much in drive. but everytime in reverse. It also doesn't seem to happen when I have been driving it for a while and park it then start it back up. Any ideas?

03-25-2015, 10:57 AM	#2
86c20 Registered User Join Date: Mar 2012 Location: edgartown mass Posts: 852	Re: Name that noise... part 2 is she is cold and a old ***** lol. the noise could be anything i would start with having some one with good hearing list to her siting there andsee if they can hear it. could be a lifter going out. have that on mine. light load i get the tap. and now i have a exhaust leak to under full load __________________ 1986 c20 "the hillbilly" 350 sm465 3.42gears 21mpg at 70mph 1985 k30 "the ice cream truck from hell" no rust az truck 197-8??? c30 "ramp truck" 454 1978 monte carlo 350 350th with 2.73 gears. no rust. sc car

03-25-2015, 11:03 AM	#3
Bigstevex4 Registered User Join Date: Oct 2014 Location: Spearfish South Dakota Posts: 407	Re: Name that noise... Next time needs aquart oil put in a quart marvels Myestery oil. Stuff is amazing with old eng. mine was burning a quart a week now it a month lifters realy quieted down. even had an eratic oil psi must have cleaned out the sender its perfict now! __________________ 83 c10 long Box Daily Driver 90 Jimmy parked 98 Road King/ 06 Road Glide In memorium 63 impala SS/ 65 Chevy Panel 65 GMC Short Box/ 68 Camero

03-26-2015, 12:54 AM	#4
craig113 Registered User Join Date: Oct 2014 Location: Tacoma, WA Posts: 106	Re: Name that noise... the tick to a rumble could be a u-joint starting to go out. __________________ 84 K30 CC LB Fleet side 454/400/205/14 bolt Rebuilt 2200 miles 91 K15 Z71 SB 350/700r/241c/12 bolt 372k miles 96 K15 Sub 350/4L60/243c/10 bolt 333k miles

03-26-2015, 09:18 AM	#5
tucsonjwt Registered User Join Date: Jul 2007 Location: Tucson, AZ Posts: 3,189	Re: Name that noise... Noises can transmit in odd places. I had the same noise and it went away when I had the clutch replaced recently. Had broken retainer in clutch fork, resurfaced flywheel, clutch kit, input shaft and bearing repair kit, etc. I would have sworn it was an exhaust leak.

03-26-2015, 12:42 PM	#6
Chrispbrown36 Registered User Join Date: Apr 2014 Location: Cunningham, KY Posts: 351	Re: Name that noise... While pulling the exhaust manifolds off I discovered that one of the heat shields were loose and rattled around. So I am thinking this could definitely be causing some noise I am hearing while driving....right now the truck is down I have it stripped down to replace gaskets and the rain started, so it's going to be a while before I can see if anything has improved.



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