I HAVE solved the mystery oil pressure problem!

wallaka

2K+
VIP
So, I ordered a new pump. I finally got around to working on the pump, and just happen to glance at the old one, and the part number writ upon it.

The new one is on the left. Notice anything fishy?



That's right, the idiot at Advance gave me a M-65C instead of M-65 B!! It's 5/16" longer, so the pickup is too close to the pan, thus starving the engine when it tries to pump at more than 50 rpm.

Moral of the story, double-check your part numbers before you put it on.

And if anybody needs an oil pump for an Argentine motor, 20 bucks and it's yours. Only used for a couple hundred miles.
 
Didn't I write something about a Argentine pump and a longer shaft? Well, anyway, good on you. And good luck.
 
Yeah, I thought about it but figured there was no way in hell that Advance Auto Parts stocked an Argentine-only pump in the Montgomery location.

Maybe Kinky6 has something new going on? I dunno.
 
Just for clarification for those who need this info:

M65A 1/4" hex drive used on earlier 170 and 144 engines

M65B 5/16" hex drive used on later model 170 and 200 engines

M65C Used on Argentine engines
 
Good job done.
I hope the engine bearings look ok after being starved of the proper amount of oil.
Great to see you will be back on the road soon.
The price of education is hell.
 
addo":3138b6kb said:
Maybe it fits the 250, as well?

Nope, that's a different part, M82.
This image might link, I'm at work so don't know.
m82.jpg
 
wsa111":mvp82h1j said:
Good job done.
I hope the engine bearings look ok after being starved of the proper amount of oil.
Great to see you will be back on the road soon.
The price of education is hell.

I never ran it with the new bearings, so I think they'll be OK. I'm just glad that I figured it out! An unsolvable problem makes for a lot of frustration.
 
Fired her up today....after refitting the gear to the dizzy this morning. The dizzy shaft had noticeble movement in it, so I bumped the gear higher and redrilled the hole. The factory shop manual just says it should be installed "so there is no play in the shaft", no measurements. No sweat, though.

So I'm sitting at 35 psi at idle, and somewhere above 50 at high revs (don't know exactly, my gauge only goes to 50). Seems pretty good to me...It'll drop when the bearings get fully broken in.

Seems like it's running rich as all get out, though it just might be the 8-month old gas in there. I might take the carby off and clean it, because it isn't idling like it should.
 
Good deal man. I am glad you finally fixed that mystery...

Now we all know to lookout for that :)

I am still confused as to why the parts store even had the argentine pump in stock
 
wallaka- here is a link from a former post i did -
if you moved the gear up the shaft then you will have moved the cam and dist gear teeth mesh centres - probably result in excess gear wear.

much better to just rotate the gear 90deg and redrill the hole. check the link for ford specs on gear height .



http://www.geocities.com/hotrod_inline6/

and look at page ' ford off highway operations parts'

Brett
melb
 
gb500":33o8r0y9 said:
wallaka- here is a link from a former post i did -
if you moved the gear up the shaft then you will have moved the cam and dist gear teeth mesh centres - probably result in excess gear wear.

much better to just rotate the gear 90deg and redrill the hole. check the link for ford specs on gear height .



http://www.geocities.com/hotrod_inline6/

and look at page ' ford off highway operations parts'

Brett
melb

Thanks. That was an good read.

However. If I put the gear back where it was, there is a great deal of play in the distributor. Like 1/8" of play. That is unacceptable; is it OK to shim the shaft? The shop manual doesn't say anything about this for Load-O's.

I'll measure the distance and report back...it might have been within spec. I don't think that the shaft riding up and down is good for anything, though.
 
Back
Top