Author Topic: Need help diagnosing an issue  (Read 3671 times)

Offline matthowell19

  • New Users
  • Posts: 2
  • Newbie
Need help diagnosing an issue
« on: February 17, 2014, 05:29:46 pm »
Hello I'm new to the forum and had some questions about a light ticking noise in my truck. It's a 1985 C10 with a 305.It is a light ticking noise when I idle or drive. When I accelerate the ticking also accelerates but sometimes it doesn't tick at all. Is it a stuck lifter? Any suggestions would be greatly appreciated.

Offline zieg85

  • Global Moderator
  • Senior Member
  • ****
  • Posts: 7595
    • 73-87 GM squarebody extended cab and conversions up to 91 R/V series
Re: Need help diagnosing an issue
« Reply #1 on: February 17, 2014, 05:42:06 pm »
From what you describe an exhaust donut leaking could be the culprit   
Carl 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/

Offline matthowell19

  • New Users
  • Posts: 2
  • Newbie
Re: Need help diagnosing an issue
« Reply #2 on: February 17, 2014, 06:44:08 pm »
Thanks for the answer I'm not much of a mechanic. How does that affect the performance of the truck because whenever I do hear that tick when I put it in drive the truck acts like it wants to.crap out, sputters but then regains power does that sound about right?

Offline Captkaos

  • OWNER and Administrator
  • Administrator
  • Senior Member
  • *****
  • Posts: 18460
    • http://www.73-87chevytrucks.com
Re: Need help diagnosing an issue
« Reply #3 on: February 18, 2014, 01:58:50 pm »
You need to isolate where the noise it coming from.  If it is an exhaust leak it won't have a major impact on performance, if it is a lifter it will.

Offline rich weyand

  • Senior Member
  • ****
  • Posts: 1391
Re: Need help diagnosing an issue
« Reply #4 on: February 18, 2014, 03:08:02 pm »
Or he could be arcing a spark plug wire.
Rich

"Working Girl": 1978 K-10 RCSB 350/TH350/NP203 +2/+3 Tuff Country lift

Offline cwest

  • Registered Users
  • *
  • Posts: 100
  • Newbie
Re: Need help diagnosing an issue
« Reply #5 on: March 04, 2014, 08:51:41 pm »
My truck has a tick too that I haven't figured out.  An old mechanic told me a trick to diagnosing that is to hold a long screw driver against the valve cover and put the other end to your ear, and then the same from the manifold.  Wherever the ticking is loudest through the screwdriver, that's your dealio.  I haven't tried it yet, but the idea seems to make sense.  You can find car engine stethoscopes too at any car parts place, same principle.     
86' Chevy K20
350/SM465/np208

08' Silverado 1500 4X4 WT

Offline Captkaos

  • OWNER and Administrator
  • Administrator
  • Senior Member
  • *****
  • Posts: 18460
    • http://www.73-87chevytrucks.com
Re: Need help diagnosing an issue
« Reply #6 on: March 04, 2014, 09:02:05 pm »
you can use a wooden broomstick handle to do this also.

Offline Irish_Alley

  • Tim
  • Senior Member
  • ****
  • Posts: 13333
  • Family is not an important thing. It's everything.
Re: Need help diagnosing an issue
« Reply #7 on: March 06, 2014, 11:25:26 pm »
or a mechanics stethoscope ;)

had a exhaust manifold gasket leak one time it also sounded like a tick
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes