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87gmc · 02-10-2003, 04:54 AM

Well my truck decided to go poot. It still runs but when i start it up there a clicking/ticking/knocking noise the gets faster as the rpms increase. It sounds like it coming from the back of the engine but i havent messed with it yet, (started tonight) will pull it in the shop and look at it tomorrow, but what should i be looking for?
Any help would be great.

Cameron

Prerunner1982 · 02-10-2003, 05:09 AM

blew a rod? my 305 had a severe knocking coming from the rear bottom of the engine.. didnt bother taking it apart to figure it out...

87gmc · 02-10-2003, 05:21 AM

no i dont think so. say maybe bent but it runs really fine no power loss at all but just the clicking but i dont wanna run it till i get it fixed.

Prerunner1982 · 02-10-2003, 05:44 AM

clicking? header collector gasket?

87gmc · 02-10-2003, 05:49 AM

maybe, ill have to look into that

Prerunner1982 · 02-10-2003, 05:52 AM

i need to do mine as well.. i can hear it clicking... annoying as hell..

87gmc · 02-10-2003, 07:10 AM

Could it be a bad u-joint?

Prerunner1982 · 02-10-2003, 07:15 AM

does it make the sound only when driving? or just when it is running?

87gmc · 02-10-2003, 07:16 AM

Both, its a slower clicking at idle and then when i accerlate in increases with the rpms/speed

Prerunner1982 · 02-10-2003, 07:37 AM

u-joint doesnt spin at idle. more than likely not it...

87gmc · 02-10-2003, 07:40 AM

hmmm

**swervin ervin** · 02-10-2003, 09:34 AM

It's definetely something which is engine rpm related, do drivetrain is not it because it's not moving. You will need to see where it's coming from, bottom or top? If top, it's probably a lifter or cam lobe going flat. A rod won't click. A rod makes a pecking sound sort of like pecking on the side of the block with something. Pecking sounds like lifter, rocker arm, pushrod, or cam to me.

If I were guessing, and this is all it is, a guess, I would guess at lifter or cam lobe. Probably cam lobe going flat. But don't panic until you figure it out.

82 Silverado 4X · 02-10-2003, 09:37 PM

If you don't turn up anything else and it's an Automatic check for a crack in your flex plate.

*mike reeh* · 02-10-2003, 11:31 PM

Can you tell if it happens every revolution or once every OTHER revolution?

once per rev is crank/rods/etc

once every other will be valvetrain..

8 out of 10 times it will be a flat lobe on the cam, a loose or worn rocker arm, or a cam lobe that went flat... get a stethoscope (a couple feet of heater hose), and remove the valve covers and start the motor and have a look

mike

02-10-2003, 04:54 AM	#1
87gmc I Got My Engine!!!!! Join Date: Oct 2002 Location: Palmer, AK Posts: 254	Stupid P.o.s.!!!!!!! Well my truck decided to go poot. It still runs but when i start it up there a clicking/ticking/knocking noise the gets faster as the rpms increase. It sounds like it coming from the back of the engine but i havent messed with it yet, (started tonight) will pull it in the shop and look at it tomorrow, but what should i be looking for? Any help would be great. Cameron __________________ F.O.R.D. "F*cked Over Rebuilt Dodge" -+-+-+-+Cameron+-+-+-+- 1987 GMC HIGH SIERRA LWB 1500 32X11.50 383 TBI/Vortec Heads/Intake MSD Ignition Dual Exhaust Custom Pinstriping Sweet interior & stereo http://www.cgalvin29.freehomepage.com

02-10-2003, 05:09 AM	#2
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,906	blew a rod? my 305 had a severe knocking coming from the rear bottom of the engine.. didnt bother taking it apart to figure it out... __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

02-10-2003, 05:21 AM	#3
87gmc I Got My Engine!!!!! Join Date: Oct 2002 Location: Palmer, AK Posts: 254	no i dont think so. say maybe bent but it runs really fine no power loss at all but just the clicking but i dont wanna run it till i get it fixed. __________________ F.O.R.D. "F*cked Over Rebuilt Dodge" -+-+-+-+Cameron+-+-+-+- 1987 GMC HIGH SIERRA LWB 1500 32X11.50 383 TBI/Vortec Heads/Intake MSD Ignition Dual Exhaust Custom Pinstriping Sweet interior & stereo http://www.cgalvin29.freehomepage.com

02-10-2003, 05:44 AM	#4
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,906	clicking? header collector gasket? __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

02-10-2003, 05:49 AM	#5
87gmc I Got My Engine!!!!! Join Date: Oct 2002 Location: Palmer, AK Posts: 254	maybe, ill have to look into that __________________ F.O.R.D. "F*cked Over Rebuilt Dodge" -+-+-+-+Cameron+-+-+-+- 1987 GMC HIGH SIERRA LWB 1500 32X11.50 383 TBI/Vortec Heads/Intake MSD Ignition Dual Exhaust Custom Pinstriping Sweet interior & stereo http://www.cgalvin29.freehomepage.com

02-10-2003, 05:52 AM	#6
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,906	i need to do mine as well.. i can hear it clicking... annoying as hell.. __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

02-10-2003, 07:10 AM	#7
87gmc I Got My Engine!!!!! Join Date: Oct 2002 Location: Palmer, AK Posts: 254	Could it be a bad u-joint? __________________ F.O.R.D. "F*cked Over Rebuilt Dodge" -+-+-+-+Cameron+-+-+-+- 1987 GMC HIGH SIERRA LWB 1500 32X11.50 383 TBI/Vortec Heads/Intake MSD Ignition Dual Exhaust Custom Pinstriping Sweet interior & stereo http://www.cgalvin29.freehomepage.com

02-10-2003, 07:15 AM	#8
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,906	does it make the sound only when driving? or just when it is running? __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

02-10-2003, 07:16 AM	#9
87gmc I Got My Engine!!!!! Join Date: Oct 2002 Location: Palmer, AK Posts: 254	Both, its a slower clicking at idle and then when i accerlate in increases with the rpms/speed __________________ F.O.R.D. "F*cked Over Rebuilt Dodge" -+-+-+-+Cameron+-+-+-+- 1987 GMC HIGH SIERRA LWB 1500 32X11.50 383 TBI/Vortec Heads/Intake MSD Ignition Dual Exhaust Custom Pinstriping Sweet interior & stereo http://www.cgalvin29.freehomepage.com

02-10-2003, 07:37 AM	#10
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,906	u-joint doesnt spin at idle. more than likely not it... __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

02-10-2003, 07:40 AM	#11
87gmc I Got My Engine!!!!! Join Date: Oct 2002 Location: Palmer, AK Posts: 254	hmmm __________________ F.O.R.D. "F*cked Over Rebuilt Dodge" -+-+-+-+Cameron+-+-+-+- 1987 GMC HIGH SIERRA LWB 1500 32X11.50 383 TBI/Vortec Heads/Intake MSD Ignition Dual Exhaust Custom Pinstriping Sweet interior & stereo http://www.cgalvin29.freehomepage.com

02-10-2003, 09:34 AM	#12
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	It's definetely something which is engine rpm related, do drivetrain is not it because it's not moving. You will need to see where it's coming from, bottom or top? If top, it's probably a lifter or cam lobe going flat. A rod won't click. A rod makes a pecking sound sort of like pecking on the side of the block with something. Pecking sounds like lifter, rocker arm, pushrod, or cam to me. If I were guessing, and this is all it is, a guess, I would guess at lifter or cam lobe. Probably cam lobe going flat. But don't panic until you figure it out. __________________ Mike 1985 Chevy C-10

02-10-2003, 09:37 PM	#13
82 Silverado 4X Genuine Chevrolet Join Date: Feb 2003 Location: South West Pennsylvania. Posts: 582	If you don't turn up anything else and it's an Automatic check for a crack in your flex plate. __________________ George 82 Silverado LWB 4x4 350 SM465 NP208 77 Chevrolet Blazer Chalet 400 TH350 NP203

02-10-2003, 11:31 PM	#14
mike reeh 5 day ban, learn to behave. Join Date: Nov 2002 Location: san diego, ca Posts: 684	Can you tell if it happens every revolution or once every OTHER revolution? once per rev is crank/rods/etc once every other will be valvetrain.. 8 out of 10 times it will be a flat lobe on the cam, a loose or worn rocker arm, or a cam lobe that went flat... get a stethoscope (a couple feet of heater hose), and remove the valve covers and start the motor and have a look mike



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