Need some help! Engine knock!
Racer
Joined: Feb 2008
Posts: 497
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From: Streator Illinois
Absolutely incorrect. An increase in pressure, as in the combustion chamber, does not cause gas to vaporize. Exactly the opposite is true. Think of it as LIQUID propane in a pressurized tank, becoming a vapor as the pressure drops when it leaves the cylinder. The only down side to too much octane is wasted money.
Terry
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Joined: Jan 2007
Posts: 82
Likes: 1
From: Portsmouth Virginia
Thanks for all the help.
I still can't have not been able to hunt it down yet. I have been working 14.5 hours a day at work so very little extra time.
Me and a buddy are going to have a go at it on Sunday.
If it is something loose I will find it. I would hate to pull the GREAT running motor and find out the fuel pump was loose. If its a flywheel bolt that will be a tough one its a 4speed!!!
I still can't have not been able to hunt it down yet. I have been working 14.5 hours a day at work so very little extra time.
Me and a buddy are going to have a go at it on Sunday.
If it is something loose I will find it. I would hate to pull the GREAT running motor and find out the fuel pump was loose. If its a flywheel bolt that will be a tough one its a 4speed!!!
Drifting
Joined: Dec 2005
Posts: 1,360
Likes: 3
From: NORTHEAST
You could try pulling the plug wires one by one and see if any noise occures when a certain plug wire is pulled off. Might be a good place to start.
We have seen engines over the years have jounal wear on number one rod jounal and cause a knocking problem.
Keep us posted.
We have seen engines over the years have jounal wear on number one rod jounal and cause a knocking problem.
Keep us posted.
Thread Starter
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Joined: Jan 2007
Posts: 82
Likes: 1
From: Portsmouth Virginia
Well.....
It has to be an oil pressure problem. Just for fun I changed the oil to 10-40 to see if the pressure would go up (I had the oil and was bored).
You know that sound an old engine makes when you start it up right after an oil change(and yes I fill the filter up with oil)? Thats the sound! I did not realize it until now. Good thing I have not run it very much like that!!
When I started It after the change it made that sound for about 5 seconds then stopped. I drove it for 20min up to full temp and no sound!!
Next weekend I am going to pull the pan and change the pump for a HV one, new screen etc and check my bearings. I know Im going to have to rebuild the motor soon but not for now!!
It has to be an oil pressure problem. Just for fun I changed the oil to 10-40 to see if the pressure would go up (I had the oil and was bored).
You know that sound an old engine makes when you start it up right after an oil change(and yes I fill the filter up with oil)? Thats the sound! I did not realize it until now. Good thing I have not run it very much like that!!
When I started It after the change it made that sound for about 5 seconds then stopped. I drove it for 20min up to full temp and no sound!!
Next weekend I am going to pull the pan and change the pump for a HV one, new screen etc and check my bearings. I know Im going to have to rebuild the motor soon but not for now!!
Drifting
Joined: Aug 2009
Posts: 1,635
Likes: 8
From: Enid Oklahoma
Thread Starter
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Joined: Jan 2007
Posts: 82
Likes: 1
From: Portsmouth Virginia
Started to pull the pump out today....
Started that is......
Headers make getting the inspection plate and starter out a pain in the as$. But they do make dropping the pan easy!
Got tired of it today, will have to finsh in up on Thursday.
Started that is......
Headers make getting the inspection plate and starter out a pain in the as$. But they do make dropping the pan easy!
Got tired of it today, will have to finsh in up on Thursday.
Thread Starter
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Joined: Jan 2007
Posts: 82
Likes: 1
From: Portsmouth Virginia
Well got it done but.....when I started cranking it (without the coil to pump some oil around)I could hear a loud knocking sound.
At first I thought the starter was loose but, I think the inspection plate is hitting the flywheel.
Thats what I hope anyway! We bent it pretty good when taking it out. The headers got in the way of it comming straight out.
Once again I have run out of time today!
At first I thought the starter was loose but, I think the inspection plate is hitting the flywheel.
Thats what I hope anyway! We bent it pretty good when taking it out. The headers got in the way of it comming straight out.
Once again I have run out of time today!
Last edited by JDemp; Dec 10, 2009 at 08:12 PM.
Thread Starter
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Joined: Jan 2007
Posts: 82
Likes: 1
From: Portsmouth Virginia
It was the inspection plate hitting the counter weight on the flywheel.
Boy that was a scary sound!!! I thought the engine was done!
Drove it around for 30 min or so, no more knocking sound yet!!
The new oil pump holds 25 to 30 or so at 800 rpm idle HOT with 10-30 Moble1.
Boy that was a scary sound!!! I thought the engine was done!
Drove it around for 30 min or so, no more knocking sound yet!!
The new oil pump holds 25 to 30 or so at 800 rpm idle HOT with 10-30 Moble1.
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