1966 Toronado 425 V8 engine overhaul need help

[harascho]

first info from "Rocket Racing & Performance"

"Unfortunately there are no .921 hydraulic roller lifters available, so a hydraulic flat tappet will be the only choice without getting your lifter bores bushed down to .842 and that is really expensive. I have a feeling the lifters you have are not metering oil correctly. We do have lifters that oil properly. I have seen your situation before and that's what it was."


Harald

[bcroe]

Hi there,
you two are on the right track. Biggest problem is I do not have any information about the previous "overhaul". I only see some parts looking like new and a quite clean lifter valley, top end....
Harald

Harald, A 66-78 Toro uses an oil pickup which extends some 1.25 inch lower than the
bolts on the pump. That is different from any Olds before, which had the pickup even
with the bottom of the pump as shown. Yours looks wrong from here.

In addition Olds uses a plug at the back of the left hand oil gallery, just forward of the
distributor. It has a small hole to oil the gear. DO MAKE SURE this plug is in place.

When the block is together, you should be able to spin the pump counter clockwise
with a drill and get good pressure; do that BEFORE cranking. After that, cranking the
engine should give plenty of pressure. If not, find out where it is going. Bruce Roe

[harascho]

Hi Bruce,

your pump pic is a good point. I remember the pickup beeing a littler lower as the pump's bottom. But I do not remember, and also the pics do not tell, those some 1.25" lower. I will see that as soon as the bottom end is disassembled. I will write an update then.
Is there any way to identify the lifters? Only obvious things are diameter, length and if I dismantele them, the oil metering plate.
What about the cam? Will I be able to tell manufacturer and type of it?

Harald

[harascho]

Disassembly:

got the lifters, cam, pan, oil pump disassembled, here's the status:

oil pump: pickup about 1,5" lower than pump body, pickup welded to pump
cam: no signs of wear ( how should that happen after the 400mls the engine ran in the car..?)

Is anybody able to identify the cam: CWC, FP28, I 5 on the gear side, a C within a dab of green paint and below a C1 on the distributor side?

lifters: they seem to perfect fit the block, no wear in the block area, but the lifters look worn on the base side and also on the outside block contact area...

removing of the pistons and checking the mains is for today.

Harald

[harascho]

Ok here I am, the 425 is in pieces and I have to make some decisions...

here's the status as of today:

crank: did not have a regrind in the past, rod and main bearing surfaces are rough. mains are about 3.000", rods 2.500"
bearings: the "builder" of the engine did use new main and rod bearings on the rough journals of the crank. They do show wear after the 400mls the engine made until it died.
lifters: look worn either bad quality or not replaced at all
cam: looks ok , as new no signs of wear
oil pump: see pics for No.. is anybody able to tell the brand?
head gasket: Felpro 8171 PT-1 Strange stuff, some of the water channels are closed, others have just a small hole, see pics?
oil drain holes of the heads: perfect clean
wear on the skirts of 3 pistons, bore 0.30" rebore of the block seems to be on the very small side as my caliper tells: 4.144"
cam: CWC FP28, base circle 1.445", lobe 1.690, intake and exhaust are similar

so far so good, I have to start a shopping list.... for sure the crank and block will see an engine builder ..
Harald

[harascho]

more pics

[harascho]

more pics

[harascho]

last set

[bcroe]

Did you check for the rear oil passage plug by the distributor gear? Bruce Roe

[harascho]

yes, the plug with the spit hole is installed.

Harald