The Ford Barn

Chris Haynes · 03-12-2018, 11:10 PM

I have developed a rod knock. Time to pull the pan and see whats happening. Hopefully the crank isn't damaged. That would open a big can of worms. I guess that answered my question whether my engine had poured or inserted bearings.

Chuck Sea/Tac · 03-12-2018, 11:18 PM

How does a rod knock determine insert or poured?

Tom Wesenberg · 03-13-2018, 02:00 AM

How was it determined whether it was a rod, piston slap, or wrist pin?

Chris Haynes · 03-13-2018, 01:36 PM

Quote:

Originally Posted by Tom Wesenberg

How was it determined whether it was a rod, piston slap, or wrist pin?

Previous experience.

katy · 03-14-2018, 08:43 AM

Ifn it just started knocking and isn't too loud yet the crank should still be good.

Chris Haynes · 03-14-2018, 12:06 PM

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It may not be a rod bearing. My engine is still running smooth at idle and low speed.When I accelerate to mid range or higher it has a ferocious hard rattle

J Franklin · 03-14-2018, 02:43 PM

A rod knock is most noticeable on deceleration.

flatford39 · 03-14-2018, 03:34 PM

What do you know about the engine. Did you rebuild it or is it an unknown used engine. Could be a ton of things. I am thinking piston slap right now. How much compression do you have?? If you have decent compression it could be wrist pins.

Chris Haynes · 03-14-2018, 09:47 PM

Quote:

Originally Posted by flatford39

What do you know about the engine. Did you rebuild it or is it an unknown used engine. Could be a ton of things. I am thinking piston slap right now. How much compression do you have?? If you have decent compression it could be wrist pins.

When I bought the car I pulled the head and replaced it with a 5.5. I noticed 4 new pistons and 8 new valves with very little carbon. That is all I know about the engine. Idle and low RPM is fine anything above that results in loud clatter.

J Franklin · 03-14-2018, 10:15 PM

I'll take a stab, how about a broken valve spring (Using ESP). BTW how was it running noise-wise before the head swap? Maybe it is time to drop the pan for a look-see. Pulling the pan is always a good idea for any engine you or any new owner is not intimately familiar with.

Chris Haynes · 03-15-2018, 01:32 AM

Quote:

Originally Posted by J Franklin

I'll take a stab, how about a broken valve spring (Using ESP). BTW how was it running noise-wise before the head swap? Maybe it is time to drop the pan for a look-see. Pulling the pan is always a good idea for any engine you or any new owner is not intimately familiar with.

I have run the 5.5 head for many months without problem.

Tom Wesenberg · 03-15-2018, 01:58 AM

Quote:

Originally Posted by Chris Haynes

When I bought the car I pulled the head and replaced it with a 5.5. I noticed 4 new pistons and 8 new valves with very little carbon. That is all I know about the engine. Idle and low RPM is fine anything above that results in loud clatter.

Same symptoms my 29 had when I bought it. My center main was totally gone. All the babbit was in the bottom of the pan.

George Miller · 03-15-2018, 06:54 AM

Sounds like a center main to me also. It does not sound like a rod.

Chris Haynes · 03-15-2018, 11:45 PM

I guess I'll find out when I pull it down. :-(

03-12-2018, 11:10 PM	#1
Chris Haynes Senior Member Join Date: May 2010 Location: Camarillo, CA and Pine Grove, CA Posts: 2,832	Rod knockin' I have developed a rod knock. Time to pull the pan and see whats happening. Hopefully the crank isn't damaged. That would open a big can of worms. I guess that answered my question whether my engine had poured or inserted bearings. __________________ 1921 Runabout 1930 Tudor Early 1930 AA Speed costs money. How fast do you want to go?

03-12-2018, 11:18 PM	#2
Chuck Sea/Tac Senior Member Join Date: May 2010 Location: Between Seattle & Tacoma Posts: 2,354	Re: Rod knockin' How does a rod knock determine insert or poured?

03-13-2018, 02:00 AM	#3
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Rod knockin' How was it determined whether it was a rod, piston slap, or wrist pin?

03-14-2018, 08:43 AM	#5
katy Senior Member Join Date: Jun 2015 Location: Red Deer, Alberta Posts: 5,042	Re: Rod knockin' Ifn it just started knocking and isn't too loud yet the crank should still be good. __________________ If you don't hear a rumor by 10 AM, start one!. Got my education out behind the barn!

03-14-2018, 12:06 PM	#6
Chris Haynes Senior Member Join Date: May 2010 Location: Camarillo, CA and Pine Grove, CA Posts: 2,832	Re: Rod knockin' Sponsored Links (Register now to hide all advertisements) It may not be a rod bearing. My engine is still running smooth at idle and low speed.When I accelerate to mid range or higher it has a ferocious hard rattle __________________ 1921 Runabout 1930 Tudor Early 1930 AA Speed costs money. How fast do you want to go?

03-14-2018, 02:43 PM	#7
J Franklin Senior Member Join Date: May 2010 Location: Oregon Posts: 5,959	Re: Rod knockin' A rod knock is most noticeable on deceleration.

03-14-2018, 03:34 PM	#8
flatford39 Senior Member Join Date: May 2010 Location: NE Illinois Posts: 499	Re: Rod knockin' What do you know about the engine. Did you rebuild it or is it an unknown used engine. Could be a ton of things. I am thinking piston slap right now. How much compression do you have?? If you have decent compression it could be wrist pins.

03-14-2018, 10:15 PM	#10
J Franklin Senior Member Join Date: May 2010 Location: Oregon Posts: 5,959	Re: Rod knockin' I'll take a stab, how about a broken valve spring (Using ESP). BTW how was it running noise-wise before the head swap? Maybe it is time to drop the pan for a look-see. Pulling the pan is always a good idea for any engine you or any new owner is not intimately familiar with. Last edited by J Franklin; 03-14-2018 at 10:21 PM.

03-15-2018, 06:54 AM	#13
George Miller Senior Member Join Date: May 2010 Location: NC Posts: 2,975	Re: Rod knockin' Sounds like a center main to me also. It does not sound like a rod.

03-15-2018, 11:45 PM	#14
Chris Haynes Senior Member Join Date: May 2010 Location: Camarillo, CA and Pine Grove, CA Posts: 2,832	Re: Rod knockin' I guess I'll find out when I pull it down. :-( __________________ 1921 Runabout 1930 Tudor Early 1930 AA Speed costs money. How fast do you want to go?

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