|
Sponsored Links (Register now to hide all advertisements) |
|
![]() |
![]() |
Thread Tools | Display Modes |
![]() |
#61 |
Senior Member
Join Date: Jan 2011
Location: Central Ohio
Posts: 5,197
|
![]()
I would not buy the Speedway pump - have seen issues with the castings.
|
![]() |
![]() |
![]() |
#62 |
Senior Member
Join Date: May 2010
Location: Oshkosh, Wi
Posts: 4,539
|
![]()
I have a fixture for testing oil pumps. I'd gladly test yours if you'd like.
|
![]() |
![]() |
Sponsored Links (Register now to hide all advertisements) |
|
![]() |
#63 |
Senior Member
Join Date: May 2010
Location: NJ
Posts: 6,249
|
![]() |
![]() |
![]() |
![]() |
#64 |
Senior Member
Join Date: Dec 2010
Location: East Coast in CT
Posts: 1,557
|
![]()
Considering the pump picks up oil and you can see if flowing nicely out of the discharge port of the housing by just turning the gear by hand shows the oil pump is working correctly. This is certainly a mystery.
If it was me I would follow the path the oil flow must travel to verify there's no big opening that would allow the oil to flow so freely you would not see a build of pressure at the sender port. Ronnieroadster
__________________
I use the F word a lot no not that word these words Flathead , Focus and Finish. "Life Member of the Bonneville 200 MPH Club using a Ford Flathead block" Owner , Builder, Driver of the First Ford Flathead bodied roadster to run 200 MPH Record July 13, 2018 LTA timing association 200.921 in one and a half miles burning gasoline. First ever gas burning Ford flathead powered roadster to run 200 MPH at Bonneville Salt Flats setting the record August 7th 2021 at 205.744 MPH |
![]() |
![]() |
![]() |
#65 |
Senior Member
Join Date: May 2010
Location: Holland Mi
Posts: 649
|
![]()
Do you have a mechanical fuel pump
|
![]() |
![]() |
![]() |
#66 |
Member
Join Date: Oct 2021
Location: Willows, CA (rural)
Posts: 58
|
![]() Sponsored Links (Register now to hide all advertisements)
__________________
Flathead Flatfender |
![]() |
![]() |
![]() |
#67 |
Member
Join Date: Oct 2021
Location: Willows, CA (rural)
Posts: 58
|
![]()
I have not yet, but I will. Thanks for reminding me!
__________________
Flathead Flatfender |
![]() |
![]() |
![]() |
#68 |
Senior Member
Join Date: May 2010
Location: NJ
Posts: 6,249
|
![]() |
![]() |
![]() |
![]() |
#69 |
Member
Join Date: Oct 2021
Location: Willows, CA (rural)
Posts: 58
|
![]()
__________________
Flathead Flatfender |
![]() |
![]() |
![]() |
#70 |
Member
Join Date: Oct 2021
Location: Willows, CA (rural)
Posts: 58
|
![]()
Oil pump clearances.
Between gear faces and cap without gasket - 0.0015 Gasket thickness - 0.0065 Total clearance = about 0.008 Ya, plenty of clearance, but I'm not sure how to make it better. Apparently it lost prime and I saw it before it reprimed? It looks like a careful assembly is in my engines future?.
__________________
Flathead Flatfender |
![]() |
![]() |
![]() |
#71 |
Senior Member
Join Date: Aug 2018
Location: Ottawa, ON
Posts: 928
|
![]()
Don’t think the 0.008” clearance is an issue. I went back through my thread on the sump oil pump rebuild I did, but I never did measure the gasket, or at least mentioned it. Michael from Third Gen mentioned up to 0.006” clearance between the gears was ok when I spoke to him about getting the gasket.
https://www.fordbarn.com/forum/showt...light=Oil+pump |
![]() |
![]() |
![]() |
#72 |
Senior Member
Join Date: May 2010
Location: Holland Mi
Posts: 649
|
![]() |
![]() |
![]() |
![]() |
#73 |
Member
Join Date: Oct 2021
Location: Willows, CA (rural)
Posts: 58
|
![]()
Why then would it have had oil pressure for the first half hour of run time? I had someone else install the cam bearings. I have no clue how it was "clocked". I did make sure before I installed the cam that the bearing feed holes matched the block. I didn't want to starve the crank or cam for that matter.
__________________
Flathead Flatfender |
![]() |
![]() |
![]() |
#74 |
Senior Member
Join Date: Aug 2018
Location: Ottawa, ON
Posts: 928
|
![]()
Could it have something to do with either one of the oil pressure relief valves? I recall wondering why there was one in the sump oil pump, and one in the block on my C59A.
|
![]() |
![]() |
![]() |
#75 |
Senior Member
Join Date: May 2010
Location: Solihull, England.
Posts: 8,784
|
![]()
Is there any chance the block could have been modified at some point in the past for 90% full flow external filter? If so the horizontal passageway in the oil gallery might have a grub screw in it.
Long shot and does not fully explain things but easy to check and rule out. Is the plug fitted correctly behind the cam gear? I'm not an 8BA guy. these might not apply. Mart. |
![]() |
![]() |
![]() |
#76 |
Senior Member
Join Date: May 2010
Location: From Chicago. Now Nashville
Posts: 214
|
![]()
I don’t think installing the rear cam bearing sideways to block the fuel pump pushrod hole is a well-known trick. I kinda doubt your installer did it, but you can check by putting the pushrod in and seeing if it is stopped by the cam bearing or if it rides on the cam lobe. If the pushrod goes all the way down to the cam, that’s definitely a problem. I think people install a plug or even put the pushrod back in.
__________________
Cars and metal rust away and are destroyed, but the Word of God will stand forever (Isaiah 40:8, Matthew 24:35). Last edited by Fritz; 04-08-2024 at 01:45 PM. Reason: Typo |
![]() |
![]() |
![]() |
#77 | |
Member
Join Date: Oct 2021
Location: Willows, CA (rural)
Posts: 58
|
![]() Quote:
__________________
Flathead Flatfender |
|
![]() |
![]() |
![]() |
#78 |
Member
Join Date: Oct 2021
Location: Willows, CA (rural)
Posts: 58
|
![]()
An 8ba only has a pressure relief on the pump. I did get to wondering if the plug at the front threaded itself out?(this can't be,,,it was TIGHT!)
__________________
Flathead Flatfender |
![]() |
![]() |
![]() |
#79 |
Senior Member
Join Date: Feb 2021
Location: Perry Mo.
Posts: 500
|
![]()
Ok. I've been following this thread from the beginning but held my tongue. I know its unlikely but when the pump gear gets up to running temp could it spin on the shaft under load then cool off and seem normal when removed and visually inspected. I'm referring to the gear on the shaft that actually moves the oil in the bottom of the pump. Tim
|
![]() |
![]() |
![]() |
#80 |
Senior Member
Join Date: May 2010
Location: NJ
Posts: 6,249
|
![]()
Not a bushing, but a plug or grub screw to block or close that hole off. Without the push rod in place, oil will be forced through that hole. In a stock set-up, the push rod would cause resistance to the flow of oil through that hole. Now there is nothing stopping it.
|
![]() |
![]() |
![]() |
|
|
Sponsored Links (Register now to hide all advertisements) |
|