1986 Honda Accord engine knonk and hard tremble

Tiny
GABZAGA
  • MEMBER
  • 1986 HONDA ACCORD
  • 4 CYL
  • FWD
  • MANUAL
  • 201,256 MILES
I was driving home from work an I began to hear a slight knock in the engine and I did not think anything of it. After a couple of miles the knock got progresevly worst. I automaticaly stoped and had my car towed home. Once I turned it on my engine was trembling hard and there was a predominent knock on the right side of the engine by the timing belt. I took it apart noticed the the belt was slightly worn so I replaced it. Once I turned it back on the knocking was still there and the engine kept trmbling hard. What happened and what do I have to do to fix it. Please do not tell me it's one of my pistons or rod. Thank you
Sunday, September 7th, 2008 AT 7:29 PM

5 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi gabzaga,

It is difficult to say what is wrong as we do not know where the knocking noise is coming from and what is causing it.

Did you check the engine oil level?
Does the noise increase with engine rpm?
Is the noise from inside of engine or external? Top or bottom?
Did you check the crankshaft pulley?
Was this
answer
helpful?
Yes
No
Monday, September 8th, 2008 AT 9:48 AM
Tiny
GABZAGA
  • MEMBER
  • 2 POSTS
Thank you for your responce. To answer your questions
1. There is oil in the car.
2. The noise does increase with higher rpm and the engine does tremble less.
3. I beleive the noise is coming from the inside of the vehicle. On the right side by timing belt. And from the bottom.I placed my hand on top and felt no knocking.
4. When I replaced the timing belt every thing looked in good and not worn at all. Teeth were in good condition.

Hopefully this brings some more light to the problem.

Thnk you
Was this
answer
helpful?
Yes
No
Tuesday, September 9th, 2008 AT 7:57 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi gabzaga,

If the knocking occurred after replacement of timing belt, I would check the crank pulley main nut, hope it is well tightened. 150 ft lbs.
Was this
answer
helpful?
Yes
No
Tuesday, September 9th, 2008 AT 7:59 AM
Tiny
GABZAGA
  • MEMBER
  • 2 POSTS
Thank you for the reply.

Actually the knocking started before the timing belt being replaced. And once I changed the timing belt it kept with the same knocking sound and it did not get better at all. After turning it on a couple of more times the knocking sound it's coming from the right side and there is slight oil leak. That I noticed coming from the bottom of the timing belt unit by the crank pulley and this started occuring as soon as the noise began, but I did not thing anything of it. Becuase I thought it was the timing belt.

Thank you again
Was this
answer
helpful?
Yes
No
Friday, September 19th, 2008 AT 10:23 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi gabzaga,

Your description seems to indicate something wrong with the con rod bearings.

I would suggest removing the oil sump to check them.
Was this
answer
helpful?
Yes
No
Friday, September 19th, 2008 AT 11:28 AM

Please login or register to post a reply.

Related Timing Belt Content

Timing Belt
GUIDE
Timing Belt
Au­to­mo­tive com­bus­tion en­gines re­quire ei­ther a tim­ing chain or belt to keep the camshaft to crank­shaft cor­re­la­tion cor­rect as part of the de­sign of the en­gine. A tim­ing belt...
VIEW MORE