c69a rebuilt

B

burnette

Senior Member
hi guys! a year went by since i ask for help on refreshing my engine. i had planned on new seals, bearings and rings. with a little honing and some valve paste grind! things didn,t work out like i had thought,i ended up sending block away for a rebuilt. and i got it back 10 months later.(never tell a guy your not in a hurrey)!
so i got the engine back assembled as a long block. i,m stuck on the oïl filter! i have been reading alot and i think i missing the fitting with the restricted hole. it must of stayed on the block. i lookup old pictures i had ,and i had a elbow in the block by my oïl pressure gauge. i assume that elbow was restricted. now i notice on the return side of the filter theres a restricted elbow there. i was thinking of using that elbow for my inlet and installing a regular elbow on my outlet. do you guys think that would work,or do i need a restricted elbow on inlet and outlet! thanks brian.
 
The perceived wisdom is that the restrictor should be on the inlet side of the filter. This keeps the pressure down in the canister itself.

Mart.
 
thats what i thought ! so i could use that fitting in my inlet . and leave outlet unrestricted. i will take filter apart again today! i must leave for work ! thanks
 
Make sure the restricted fitting is the right size, otherwise you may loose pressure or loose the efficiency of the filter.
 
The Canadian engines have some different components than US built ones. Ford USA had restrictors in the out to filter fitting on the block . Some had restrictors in the oil pan return fitting too (some may have had both). I don't know what the Canadian engines used for certain in that time frame with their 59 series upgrade engine the C69.
 
rotorwrench said:
The Canadian engines have some different components than US built ones. Ford USA had restrictors in the out to filter fitting on the block . Some had restrictors in the oil pan return fitting too (some may have had both). I don't know what the Canadian engines used for certain in that time frame with their 59 series upgrade engine the C69.
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I higly doubt that ford put a restrictor in the returnline of the filter.
Would be interesting to see some information on why and on what engine it was original fitted that way.
If it is in the block or in the canister on the feed side doesn´t matter.
But in the return line is a recipe for disaster.
 
I've only seen one with the pan restrictor but I don't know what year model it was from. It may have been one of the early oil filter set ups. Canadian engines don't usually make it this far south. I've heard that some still had boss opening for the oil cooler set up but it was likely the early ones just after the war.
 
Doesn't make much sense to put a restrictor in the return line. Would think that would interfere with the way the filter is intended to work. It would also run up the pressure inside the filter housing, which sure doesn't seem like a good idea.
 
Well here is my take on restrictors which is contrary to some of the above comments.

Restrictors on the inlet DO NOT restrict pressure. They restrict Flow

All filter canisters that I have seen also have a restrictor hole in the stand pipe

I posted a picture last year of inside my 46 oil pan during it's first rebuild that also had a .060 hole in the fitting from the return line.

I will try and find that post and edit this post

Check post #18
https://www.fordbarn.com/forum/showthread.php?t=215241

John
 
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oldford2 said:
Restrictors on the inlet DO NOT restrict pressure. They restrict Flow. All filter canisters that I have seen also have a restrictor hole in the stand pipe. John
Click to expand...

The common setup is ~.060 restrictor on the inlet and (2) ~.060 restrictor holes on the stand pipe. This should allow ~twice the flow out of the canister as the flow into it, which should equate to lower pressure.
 
8BA types just had the stand pipe follow up restrictor for outlet back to the pan. They didn't restrict it where the tube flows it back in the side of the block above the pan rail. Those earlier ones had the boss on the dip stick casting on the side of the pan. I haven't worked on a lot of the 59 & earlier engines so I wasn't sure about them but I figured they probably did.
 
JSeery said:
The common setup is ~.060 restrictor on the inlet and (2) ~.060 restrictor holes on the stand pipe. This should allow ~twice the flow out of the canister as the flow into it, [B]which should equate to lower pressure.
Click to expand...


[/B]
should equate to lower pressure. Where?[/QUOTE]
Should?? Engine oil pressure from the sender?
Please explain
 
oldford2 said:
[/B]
[/B]
should equate to lower pressure. Where?
Click to expand...
Should?? Engine oil pressure from the sender?
Please explain[/QUOTE]

If you restrict flow into a canister with free return out (double area of return).
The pressure inside the canister will be the backpressure of the filter media.
 
The design was to get the oil as far up into the canister as practicable so that most of the media was put to use. The media should be porous enough to pass through with out much back pressure. Most of these types will filter more than the spin on types will due to their element size and type of media. Engine oil pressure isn't affected all that much by this design but it is surprising how much flow they actually get through there. When the oil is warmed up, it flows quit a bit.

I've cleaned some 8BA types out that were sludged all the way up to the filter cartridge. It's a PITA to get that stuff out too. Previous owners or lube & tune guys just yanked out the old one and threw in the new without cleaning the crap out.
 
thanks guy for your help! turns out my outlet is not restricted,it was dirty! would someone have a part number for the fitting. i was tempted to macgyver a brass plug into the fitting with a 1/16 hole, maybe with some loctite to keep plug in place.
 
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