Honda Gx160

Reply

  #1  
Old 05-20-08, 08:27 PM
Member
Thread Starter
Join Date: May 2008
Location: USA
Posts: 58
Honda Gx160

I have a Honda Gx160 that is making a knocking noise. What could cause it to make a knocking noise??
 
Sponsored Links
  #2  
Old 05-20-08, 09:46 PM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 16,818
I don't know what it is bolted to, but usually a knock on a GX honda is casued by whatever it is attatched to. If it has a pulley on the shaft, it may be loose.
 
  #3  
Old 05-21-08, 08:58 PM
Member
Thread Starter
Join Date: May 2008
Location: USA
Posts: 58
no the knocking is internal
 
  #4  
Old 05-21-08, 09:05 PM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 16,818
A lot of things could cause a knocking noise. Usually a worn rod bearing surface is the cause, but there are a lot of moving parts and load bearing surfaces that could wear and allow a know.
 
  #5  
Old 05-21-08, 09:13 PM
Member
Thread Starter
Join Date: May 2008
Location: USA
Posts: 58
well heres the deal I had several older engines in parts just laying around. They where all of the same type honda G x 160 5.5 HP, so i decided to try and build one since i had a new connecting rod and piston + rings. So after i got it all together and got the timing + valve clearances right it fired right up. I did not pay much attention to what it sounded like because i was just happy that it fired up. IT was my first attempt to rebuild and engine. A couple days later when i went to fire it up again i noticed a knocking noise. To be sure i removed the head and turned it over to see if it was inside the block. I am 100% sure that what ever it is is coming from inside the block. I am leaning towards bad bearings like you mentioned, but i just dont have enough experience to be able to tell.
 
  #6  
Old 05-21-08, 09:19 PM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 16,818
Did the crankshaft you used have a nice smooth journal surface?
 
  #7  
Old 05-21-08, 09:28 PM
Member
Thread Starter
Join Date: May 2008
Location: USA
Posts: 58
Both the crankshaft and the camshaft where in excellent condition. I know that it is not the connecting rod or piston. The cylinder is in great shape, and i thought that the bearings where in good shape. I am really stumped as to what it could be.
 
  #8  
Old 05-22-08, 01:24 AM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 16,818
Could the rod be installed backwards and be hitting the cam or part of the block? I don't recall for sure, as I seldom see the inside of a GX honda, but I believe the rod must be installed one way only. I'll have to check a manual to be sure.
 
  #9  
Old 05-22-08, 06:11 AM
Member
Join Date: Mar 2008
Location: Boca Raton, FL
Posts: 211
Could the rod be oversize or could the crank have been ground once before? I'd use plastigague or better yet, a micrometer set to check the bearing clearances.

- Joe
 
  #10  
Old 05-22-08, 09:24 AM
Member
Thread Starter
Join Date: May 2008
Location: USA
Posts: 58
Cheese i know the rod is on right, because there is only one way it can go on and i made sure it cleared everything before i put the side cover on. Im going to tear it down today and check the bearings and see if there is something inside that i missed.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes