The Ford Barn

4tford · 08-10-2014, 12:54 PM

Fuel pump push rod groove is pitted. Would you use the cam or turf it. Cam is very nice otherwise. 21A cam. thanks Bill

Kahuna · 08-10-2014, 01:28 PM

4tford
I don't think That it's useable, but I'm no expert. Why not run it and use an electric pump?

4tford · 08-10-2014, 01:47 PM

I have about 36 cams I am sorting and cleaning. Don't want to scrap anything useable.

Chris Nelson · 08-10-2014, 01:52 PM

I would talk to a cam grinder. They may be able to clean it up.

Pete · 08-10-2014, 01:55 PM

It should be ok.

4tford · 08-10-2014, 01:56 PM

Sponsored Links (Register now to hide all advertisements)

If they clean it up it will shorten the stroke on the rod. Don't want to get into welding on the rods.

ford3 · 08-10-2014, 02:22 PM

I wouldn't use it, with those pits its only going to get worse, and I don't like the thought of those pits going under the push rod, nothing good can happen

4tford · 08-10-2014, 02:24 PM

The motor was seized and pits from rust where push rod sat. Low spots not high spots.

ford3 · 08-10-2014, 02:33 PM

ok, a hole or a crater, it doesn't matter, its rough there, when you run over a pot hole what happens? its rough, multi ply that by about 2000 times a minute and what do you think is going to happen

Pete · 08-10-2014, 02:43 PM

Quote:

Originally Posted by ford3

ok, a hole or a crater, it doesn't matter, its rough there, when you run over a pot hole what happens? its rough, multi ply that by about 2000 times a minute and what do you think is going to happen

The end of the push rod is far bigger than any of the pits. It will slide right over for many moons. Nothing bad is going to happen.

4tford · 08-10-2014, 03:22 PM

many thanks guys....

Kube · 08-10-2014, 04:36 PM

Here's another thought:
Stock cams are cheap. No one in their right mind will give you .10¢ for this one. You say you have 36 of them? Make it 35.
Those pits are far below the hardened surface of that cam lobe and in service, that area will denigrate quickly.

Pete · 08-10-2014, 04:41 PM

"Those pits are far below the hardened surface of that cam lobe and in service, that area will denigrate quickly."

The core is the same hardness all the way through.

Kube · 08-10-2014, 04:50 PM

Quote:

Originally Posted by Pete

"Those pits are far below the hardened surface of that cam lobe and in service, that area will denigrate quickly."

The core is the same hardness all the way through.

Camshafts are hardened all the way through? Wow! That's a new one on me.

ford3 · 08-10-2014, 05:17 PM

those pits are going to do nothing but get bigger and deeper, would you run a crank with those pits in it? look what happens to lifters when run against a pitted or worn cam lobe,

Ronnie · 08-10-2014, 05:22 PM

http://www.efd-induction.com/~/media...Hardening.ashx

R

Kube · 08-10-2014, 06:18 PM

Quote:

Originally Posted by Ronnie

http://www.efd-induction.com/~/media...Hardening.ashx

R

I knew this. Hopefully Pete will take the time to study this.

Pete · 08-10-2014, 06:35 PM

"http://www.efd-induction.com/~/media...Hardening.ashx"

That link does not work here.

"Camshafts are hardened all the way through? Wow! That's a new one on me."

You learn something new every day.
If you had ground as many flathead Ford V8 cams as I have you would know about this.
While there may be a very small (1/8 dia) core in the middle that is softer (not dead soft), it is essentially the same all the way through.
Also, don't assume ALL cams are like this. They are not. There are several methods used to heat treat them depending on material and application.

"Been in the cam business 60 years"

42merc · 08-10-2014, 06:45 PM

btt

flatjack9 · 08-10-2014, 06:55 PM

What is the load on that push rod? Fuel pump pressure is around 3 lb, so not much. Comparing this to a crankshaft or cam lobe is a little silly. I'd trust Pete's judgement.

08-10-2014, 12:54 PM	#1
4tford Senior Member Join Date: May 2010 Location: Regina Canada Posts: 1,335	camshaft would you use it? Fuel pump push rod groove is pitted. Would you use the cam or turf it. Cam is very nice otherwise. 21A cam. thanks Bill

08-10-2014, 01:28 PM	#2
Kahuna Senior Member Join Date: May 2010 Location: NorCal Posts: 2,617	Re: camshaft would you use it? 4tford I don't think That it's useable, but I'm no expert. Why not run it and use an electric pump?

08-10-2014, 01:47 PM	#3
4tford Senior Member Join Date: May 2010 Location: Regina Canada Posts: 1,335	Re: camshaft would you use it? I have about 36 cams I am sorting and cleaning. Don't want to scrap anything useable.

08-10-2014, 01:52 PM	#4
Chris Nelson Senior Member Join Date: May 2010 Location: Poulsbo, WA. Posts: 356	Re: camshaft would you use it? I would talk to a cam grinder. They may be able to clean it up.

08-10-2014, 01:55 PM	#5
Pete Senior Member Join Date: May 2010 Location: Wa. Posts: 5,409	Re: camshaft would you use it? It should be ok.

08-10-2014, 01:56 PM	#6
4tford Senior Member Join Date: May 2010 Location: Regina Canada Posts: 1,335	Re: camshaft would you use it? Sponsored Links (Register now to hide all advertisements) If they clean it up it will shorten the stroke on the rod. Don't want to get into welding on the rods. Last edited by 4tford; 08-10-2014 at 02:14 PM.

08-10-2014, 02:22 PM	#7
ford3 Senior Member Join Date: Oct 2012 Location: oroville calif. Posts: 1,453	Re: camshaft would you use it? I wouldn't use it, with those pits its only going to get worse, and I don't like the thought of those pits going under the push rod, nothing good can happen

08-10-2014, 02:24 PM	#8
4tford Senior Member Join Date: May 2010 Location: Regina Canada Posts: 1,335	Re: camshaft would you use it? The motor was seized and pits from rust where push rod sat. Low spots not high spots.

08-10-2014, 02:33 PM	#9
ford3 Senior Member Join Date: Oct 2012 Location: oroville calif. Posts: 1,453	Re: camshaft would you use it? ok, a hole or a crater, it doesn't matter, its rough there, when you run over a pot hole what happens? its rough, multi ply that by about 2000 times a minute and what do you think is going to happen

08-10-2014, 03:22 PM	#11
4tford Senior Member Join Date: May 2010 Location: Regina Canada Posts: 1,335	Re: camshaft would you use it? many thanks guys....

08-10-2014, 04:36 PM	#12
Kube Senior Member Join Date: May 2010 Location: Wisconsin, USA Posts: 9,008	Re: camshaft would you use it? Here's another thought: Stock cams are cheap. No one in their right mind will give you .10¢ for this one. You say you have 36 of them? Make it 35. Those pits are far below the hardened surface of that cam lobe and in service, that area will denigrate quickly. __________________ "I can explain it for you. However, I can't understand it for you".

08-10-2014, 04:41 PM	#13
Pete Senior Member Join Date: May 2010 Location: Wa. Posts: 5,409	Re: camshaft would you use it? "Those pits are far below the hardened surface of that cam lobe and in service, that area will denigrate quickly." The core is the same hardness all the way through.

08-10-2014, 05:17 PM	#15
ford3 Senior Member Join Date: Oct 2012 Location: oroville calif. Posts: 1,453	Re: camshaft would you use it? those pits are going to do nothing but get bigger and deeper, would you run a crank with those pits in it? look what happens to lifters when run against a pitted or worn cam lobe,

08-10-2014, 05:22 PM	#16
Ronnie Senior Member Join Date: May 2010 Location: Canada Where it snows Posts: 2,058	Re: camshaft would you use it? http://www.efd-induction.com/~/media...Hardening.ashx R

08-10-2014, 06:35 PM	#18
Pete Senior Member Join Date: May 2010 Location: Wa. Posts: 5,409	Re: camshaft would you use it? "http://www.efd-induction.com/~/media...Hardening.ashx" That link does not work here. "Camshafts are hardened all the way through? Wow! That's a new one on me." You learn something new every day. If you had ground as many flathead Ford V8 cams as I have you would know about this. While there may be a very small (1/8 dia) core in the middle that is softer (not dead soft), it is essentially the same all the way through. Also, don't assume ALL cams are like this. They are not. There are several methods used to heat treat them depending on material and application. "Been in the cam business 60 years"

08-10-2014, 06:45 PM	#19
42merc Senior Member Join Date: Feb 2011 Location: Buchanan, MI Posts: 676	Re: camshaft would you use it? btt

08-10-2014, 06:55 PM	#20
flatjack9 Senior Member Join Date: May 2010 Location: Oshkosh, Wi Posts: 4,527	Re: camshaft would you use it? What is the load on that push rod? Fuel pump pressure is around 3 lb, so not much. Comparing this to a crankshaft or cam lobe is a little silly. I'd trust Pete's judgement.