Oil in injector housing?

[LGAFF]

I am going to look at the hardware store today for stainless washers....you know Kurt White has these for $9.99 each, not cheap but not too bad.

[A26B]

Originally Posted by tomtom72

Tom

Jeff, the hole that is completely "pluged" is the coolant passage in the I/H that exits coolant from the block thru the I/H and then into the tubes.

Tom,

If I'm understanding you correctly, you are referring to the 3rd crankcase vent hole in the injector housings, the other two being completely open or with "washer baffles for the 90 MY.

If so, although it is directly below the coolant outlet passage on the side, it is NOT a coolant passage and DOES NOT "exits coolant from the block thru the I/H and then into the tubes." It is a crankcase vent, just like the other 2, except that it is plugged off in the 90MY. The coolant from the block goes through a passage located between the front 2 cylinders intake ports on each bank.

In that regard, I'm at a loss to offer a reason for the 90 MY front, 3rd vent port being plugged with a solid washer. Adding to the mystery, when the washers were eliminated for subsequent models, the same vent port is open in the inj hsng and the hole is drilled in the corresponding cyl head area.

I think if it were me, with late model inj housings on a 90, I would put "drilled" washers in all crank case vent ports. If they opened it up completely in all years after the 90, then it seems a logical thing to do.

[-=Jeff=-]

What is the DIA of the late IH holes? is it the same as the 'non-baffled' area of the 90 IH?

[tomtom72]

Okay, near as I can determine with my simple non-digital caliper/slide ruler....the holes are all the same size on the 90 and 91 I/H's....I only have those parts so I would figure the rest are the same also? I doubt that the holes are different sizes, it don't make sense.

The diameter is somewhere between 1 1/16 " and 1 1/32"....I tried 1 & 1/16" and it is too big.....I can't seem to find a 1 & 1/32" plug from Dorman's selection. They list it, but rockauto don't list it. It's a real pia to search thru the dorman pfd by size.

I almost gave up at one point. I tried to convince myself that using a ported plenum and I/H on an unported head is useless. However I figured if the difference between my stock head port size and the ported I/H wasn't that far off it would not be too much of a stupid move to use the ported stuff? Besides I figured if the ports' size difference was too big, I could always close up the bottom of the I/H port to the head port size. However unless I can fix the PCV restrictor issue first I'm not even bothering to pull my stuff to see how badly the port size & alignment is off. I was thinking of e-mailing Mr. Carter but it seems like I'd be wasting his time on such trivial stuff.

[-=Jeff=-]

If you contact carter double the amount and I would buy a set

[tomtom72]

Originally Posted by -=Jeff=-

If you contact carter double the amount and I would buy a set

I may work up to it yet....you're in Jeff! I'll double the order & keep you in the loop.

[-=Jeff=-]

do you have a PN for the dorman 1 1/32 freeze plug?

[tomtom72]

Originally Posted by -=Jeff=-

do you have a PN for the dorman 1 1/32 freeze plug?

I'll pull up the pfd and look for it. Give me a minute.

[-=Jeff=-]

I just did , 550-013 is 1-1/32"

[tomtom72]

Originally Posted by -=Jeff=-

I just did , 55-013 is 1-1/32"

I found two others 555-165 and 555-173 both are steel.

I'm going to look in my shop at what I bought so far I know 1 1/8" is too big, I just can't be 100% that I didn't order any 1 1/32" ones.


Yea, I remembered correctly. I never bought any 1 1/32" plugs to try.