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Fuel Pump Replacement - 1970 440 motor

Posted By: dg_dodge

Fuel Pump Replacement - 1970 440 motor - 02/15/09 02:53 AM

Hello All,

It looks like I need to replace the (stock type) mechanical fuel pump on my 1970 Super Bee (440 engine). Not having done this before, I wanted to check with the experts out there to get the steps down before I give this a go ...

Also, I recall someone once mentioning a "push rod?" that is inside the housing that I'll need to be careful with. Not sure exactly what this entails... so if anyone can shed some light on the steps for me it would be greatly appreciated!

Thanks much!
Posted By: DaytonaTurbo

Re: Fuel Pump Replacement - 1970 440 motor - 02/15/09 05:11 AM

Yeah there's a push rod that actuates the lever on the inside of the fuel pump. When you take out the fuel pump, there's a good chance the pushrod will fall down. That's what that hex plug right below the fuel pump is for. Before installing the new pump, just take your finger and push the pushrod back up if it fell down.
Posted By: OzHemi

Re: Fuel Pump Replacement - 1970 440 motor - 02/15/09 05:17 AM

And if it keeps falling down when you push it up, you can pull the hex plug out, slide the push rod out and wipe a little grease on it and slide it back in, that will help hold it up while you install the fuel pump
Posted By: Greentween

Re: Fuel Pump Replacement - 1970 440 motor - 02/15/09 02:28 PM

Definatly take the rod out and measure its length to check for wear.
Posted By: dg_dodge

Re: Fuel Pump Replacement - 1970 440 motor - 02/15/09 06:00 PM

Thanks a lot all for the suggestions on the push rod. I'll give this a shot next weekend!

Posted By: dg_dodge

Re: Fuel Pump Replacement - 1970 440 motor - 02/16/09 05:41 PM

Another fuel pump question ..

For the pump itself - Is there anything special for a 1970 440 pump I need to look for when buying a new one? (I should have mentioned before, but this is for a stock 440-6 setup)

What fuel pressure (or gallons per hour) should I look at for a stock 440-6 setup?). Are Holley's or Carter high performance the way to go ... or do the stock replacements from Napa, etc work for this setup?

I noticed some have screw-in fittings for the lines and some have hose nipples.. Any preferences on those?

Thanks a lot!
Posted By: dg_dodge

Re: Fuel Pump Replacement - 1970 440 motor - 02/17/09 07:12 PM

Thanks !
Posted By: JohnRR

Re: Fuel Pump Replacement - 1970 440 motor - 02/17/09 10:47 PM

street pump , 6-7 psi , the race mech pumps put out 9psi and thats NOT good .
Posted By: Classof70Chally

Re: Fuel Pump Replacement - 1970 440 motor - 02/17/09 11:19 PM

Quote:

street pump , 6-7 psi , the race mech pumps put out 9psi and thats NOT good .

FYI I had a Carter street pump and with the engine just spinning with the starter it was pushing 8 psi which is apparently to much for the 6 pack carbs as mine were pushing past the inlet valves. I went with a factory style replacement which runs 5-6 psi and looks more correct also.
Posted By: dg_dodge

Re: Fuel Pump Replacement - 1970 440 motor - 02/17/09 11:51 PM

Thanks everyone for your help on this... I've found a Carter stock replacement at Summit (M4589) that is rated at 5.5 to 6.5 psi (and 120 gph). This sounds like it will be in the right range for my stock 440-6 setup, right?

An additional question though - On my existing fuel pump (which now appears to be an aftermarket Carter??) there is a fitting adapter and short steel line from the "OUT" side of the fuel pump leading up to the vapor separator unit. Was this how these were configured from the factory or did someone add this on later?

The new Carter I see at Summit only has two nipple type hose outlets... In that case, I would just need to run a rubber hose directly from the pump to the vapor separator, right?

Thanks again all for the help and suggestions!

Attached picture 5032782-pump.jpg
Posted By: Classof70Chally

Re: Fuel Pump Replacement - 1970 440 motor - 02/18/09 12:36 AM

You can do that and it will be fine although it won't be "show correct" for lack of a better term. I found a direct replacement with the correct fitting for the steel line that goes to the vapor canister. I think I found it at Rock Auto or PartsAmerica on the web. Maybe someone here has a better source. Anyway, with the stock type pump I have yet to run my carbs out of fuel. Of course being ex law enforcement I usually lift before I totally bury the speedo!
Posted By: dg_dodge

Re: Fuel Pump Replacement - 1970 440 motor - 02/18/09 03:40 AM

Ok, Thanks a lot for the help!

I checked on RockAuto and found one which looks a lot like the stock one ... It's made by "Airtex" and has a model # of 4845 - which matches the Mopar # I see in my service manual. Unfortunately, the website doesn't list the gallons per hour or psi though.

So, unless anyone out there knows of any issues with this brand, I'll give this one a shot.

Thanks again all for the advice.
Posted By: JohnRR

Re: Fuel Pump Replacement - 1970 440 motor - 02/18/09 02:29 PM

Quote:

Thanks everyone for your help on this... I've found a Carter stock replacement at Summit (M4589) that is rated at 5.5 to 6.5 psi (and 120 gph). This sounds like it will be in the right range for my stock 440-6 setup, right?

An additional question though - On my existing fuel pump (which now appears to be an aftermarket Carter??) there is a fitting adapter and short steel line from the "OUT" side of the fuel pump leading up to the vapor separator unit. Was this how these were configured from the factory or did someone add this on later?

The new Carter I see at Summit only has two nipple type hose outlets... In that case, I would just need to run a rubber hose directly from the pump to the vapor separator, right?

Thanks again all for the help and suggestions!



what you show in the picture is the factory original line setup , the adaptor is to go to the non stock pump so the stock line could be reused .
Posted By: Classof70Chally

Re: Fuel Pump Replacement - 1970 440 motor - 02/18/09 05:05 PM

Quote:

Ok, Thanks a lot for the help!

I checked on RockAuto and found one which looks a lot like the stock one ... It's made by "Airtex" and has a model # of 4845 - which matches the Mopar # I see in my service manual. Unfortunately, the website doesn't list the gallons per hour or psi though.

So, unless anyone out there knows of any issues with this brand, I'll give this one a shot.

Thanks again all for the advice.

That part # sounds familiar to me. As far as the psi, once you get it installed you can check it with some help from a friend to 'spin' the motor and the use of a vacuum/fuel pressure gauge.
Posted By: Mr.Yuck

Re: Fuel Pump Replacement - 1970 440 motor - 02/18/09 09:53 PM

your ush rod should be fine. You can go to any parts store and get one. Tell them you have a 440-6 engine. This pump has more volume than the standard bb pump.
Posted By: dg_dodge

Re: Fuel Pump Replacement - 1970 440 motor - 02/19/09 12:05 AM

Thanks everyone for your help on this topic. I ordered one today. It's an " AIRTEX Part #4845 - for 440 w/High Performance Engine". And looks to be a good match to the stock one.

One last simple question .. as I've never replaced a fuel pump on this car before .. What is the best approach to doing this? Should I take out the alternator and try to do this from above? Or is this something that I'll need to work on from below (not a lot of room there so just wanted to check first before tearing things apart).

Also, about that hex bolt for the push rod access -- Will I always need to remove that when I remove the fuel pump or only if the push rod won't go back in? It looks like the vapor separator may need to come off as well to get to that bolt??

Thanks again for any tips/steps on this process for a first timer !

Posted By: JohnRR

Re: Fuel Pump Replacement - 1970 440 motor - 02/19/09 01:02 AM

Quote:

Thanks everyone for your help on this topic. I ordered one today. It's an " AIRTEX Part #4845 - for 440 w/High Performance Engine". And looks to be a good match to the stock one.

One last simple question .. as I've never replaced a fuel pump on this car before .. What is the best approach to doing this? Should I take out the alternator and try to do this from above? Or is this something that I'll need to work on from below (not a lot of room there so just wanted to check first before tearing things apart).

Also, about that hex bolt for the push rod access -- Will I always need to remove that when I remove the fuel pump or only if the push rod won't go back in? It looks like the vapor separator may need to come off as well to get to that bolt??

Thanks again for any tips/steps on this process for a first timer !





Take off the altenator , makes it easier , no reason to go at it from below .

As far as pulling the fuel pump pushrod , no need , get some grease on a finger , the rod will fall down, grease the rod and push it back up and it should stay up long enough to get the pump in. the pump probably won't sit against the block because of the eccentric on the cam so just suck it in wit hthe bolts slowly .
Posted By: dg_dodge

Re: Fuel Pump Replacement - 1970 440 motor - 02/19/09 01:41 AM

Thanks very much Johnahah. On the grease you mention to hold the rod in -- what type of grease do you use? Just making sure I don't put the wrong stuff in there!

Thanks a lot !
Posted By: RapidRobert

Re: Fuel Pump Replacement - 1970 440 motor - 02/19/09 02:05 AM

A slight dab of brown wheel bearing grease works good. You're not using enough to have any effect on the lube qualities of your eng oil
Posted By: NTOLERANCE

Re: Fuel Pump Replacement - 1970 440 motor - 02/19/09 03:44 AM

I spent an entire saturday when I was in high school changing a mopar big block fuel pump, on the street, in the cold (december) standing on a snow bank........ You can actually get the bolts started in the fuel pump but you cant tighten it when the push rod is in the way.

When your 16 no one tells you this stuff. Took me an entire day to figure out the push rod fell down.

An NO the beer wasnt consumed during the install, I was 16! (beer happened later, and I have the ticket to prove it! )
Posted By: Classof70Chally

Re: Fuel Pump Replacement - 1970 440 motor - 02/19/09 04:30 AM

If the rod won't go up far enough to allow the fuel pump arm to go all the way in, just take the coil wire off, bump the starter a bit and get the fuel pump eccentric to move out of the way. This will allow the pump arm to go all the way in or close to it. The bolt towards the firewall can be a pitb to get started sometimes. Try to get it started by hand before you put a socket on it.
Posted By: JohnRR

Re: Fuel Pump Replacement - 1970 440 motor - 02/19/09 02:33 PM

Quote:

A slight dab of brown wheel bearing grease works good. You're not using enough to have any effect on the lube qualities of your eng oil



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