Intermittent Check Engine - No Codes

Reply #30 – April 04, 2008, 09:34:32 AM

Update:

JCassity -- just read your post.

FYI regarding:

Quote

you never mentioned if they gave you your old parts back or what your "rebuild" entailed.
If you went as cheap as possible, then they probably reused your old crank and your gap is too large on the mains and rods.

No didn't get the old parts back. Did not go on cheap -- approx. $4000. Whether I got taken???? They did reuse the old crank. and gave me a tech sheet on all milling. Will post later today.

Your post basically is what I did.

Found that the oil pressure switch triggers between 3 1/2 and 7 lbs.
So that answered my question regarding pressure.

Took car back to re-builder (he's AERA). Received back yesterday (in shop 1 day)
1) Indicated oil pressure at stop idle was 6 psi
2) Said according to AERA has a problem with oil pump gears being to short.
3) Said he had to mill down the pump cover in order to lengthen the gear length.
Indicated he was able to do this without removing the timing cover.
4) Pressure at stop idle now is supposedly 10 psi.
Haven't driven the vehicle far enough yet to know if fixed.
Light previously came on between 13-14 miles of stop/go.

-----------------
Based on your description:

Quote

more info now.....
The oil filter screws on the timing cover
at the 2 o'clock of the oil filter is your oil pres switch
remove filter and you will see 6 bolts
remove six bolts and there reveals your oil pump gears.
remove the gears and there will be a slot or hole exposed.
you will see a rod like thing a ma jig up in there
that is a long metal thingy that is inside the timing cover.
this slides back and forth with a spring on one end.
"THIS" would be the oil presure relief valve.
The only way to R/R it is to remove the timing cover.
There is a freeze plug on the back side of the timing cover driver side
Drill it and pop it out , remove the valve and spring.
A new oil pump gear set will come with:gears, valve,spring,freeze plug

Dropping in a new gear set would seem more logical to me.

Ever hear of milling the cover or is he blowing smoke up you know where??

Intermittent Check Engine - No Codes

Reply #31 – April 04, 2008, 10:11:28 AM

There is an AERA TB 1075 that addresses
"Broken Oil Pump Intermediate Shaft On Ford 3.8 Engines"

Indicates some after market pump gaskets are not thick enough or do not even include a gasket (original gasket was metal at .010) to give proper clearance between gear set and oil pump cover. Gears should normally extend .0020-.0055 beyond housing.
The desired oil pump end cover to gear clearance should be .0045-.0080.

His milling results:

Bore 3.8405
Piston Wall Clearance .0015
Journal Size - Main 2.51886
Journal Size - Rod 2.3106
Main Bearing(#2) .0012
Rod Bearing .0017
Crank End Play .005
Ring Gap - Top .018
Ring Gap - Second .020
Deck Clearance -.008

Nothing regarding the CAM. Whether above good/bad beyond my pay grade!!!