Sudden loss of oil pressure.

Topic: Sudden loss of oil pressure. (Read 9127 times) previous topic - next topic

Sudden loss of oil pressure.

Reply #15 – October 12, 2013, 07:57:46 PM

Jay i have been blue printing pumps for many years now. Here is a tip for you. Gear end play is around .004 on just about every pump on the planet. Increasing the end play is very bad. I do not want to scare you but when i build pumps for any engine i always save the old plate from the old pump. And then i use Plasti gauge to see what the gear to plate clearance is. Same as checking a rod bearing clearance. Once i get the clearance i want by shaving down the case i use the old plate along with the new one with longer bolts. This prevents the plate from curling and messing up the pump seal. But you said you shimmed the plate with gasket material. Buddy that is big time bad!! I do a lot of Buick GN and GNX cars and those pumps have a gasket. reason being the pump is built in to the front cover and it is external. That pump comes with several thickness gaskets to get the required .003 clearance. We use steel shims or gaskets in stead of normal paper or velemoid gasket material

Sudden loss of oil pressure.

Reply #16 – October 12, 2013, 09:49:39 PM

i just measured my fish paper,, its .014 thick,,, hi-jack over

Sudden loss of oil pressure.

Reply #17 – October 13, 2013, 12:37:20 AM

Not sure what you mean by high-jack over? What is the actual end play of the driven gears? If more than .003 - .005 it is out of speck!

Sudden loss of oil pressure.

Reply #18 – October 13, 2013, 09:42:00 AM

this is foe's thread, not mine

Sudden loss of oil pressure.

Reply #19 – October 13, 2013, 10:28:55 AM

Thanks i did not understand. You know i am OLD!!

Sudden loss of oil pressure.

Reply #20 – October 18, 2013, 06:58:24 PM

Ok, engine's out, and here's whats up.

The remains of the pump shaft

The pump housing. In the lower half of the pic, you can see a ding in the aluminum, which is actually raised into the cavity. Also, whatever did this also left a good deal of scoring in the housing in the upper section of the pic.

The outer gerotor. Whatever caused the damage to the casing struck here, too. the damage lines up on both. Unlike the housing, this is steel. The two points of damage will not pass one another.

Sudden loss of oil pressure.

Reply #21 – October 18, 2013, 07:00:43 PM

Tomorrow or Monday, I'll pull caps and check oil clearance. Any theories? I can't explain how anything got past the pickup screen. I inspected it, and it's perfectly intact. I'm cautiously optimistic.

Sudden loss of oil pressure.

Reply #22 – October 18, 2013, 07:26:00 PM

Possibly an internal failure, poor quality control. I had a 95 5.0's oil pump poop the bed with only 33,000 on it

Sudden loss of oil pressure.

Reply #23 – October 19, 2013, 10:31:43 AM

Found out what got in the pump, and it puts her up for the winter. It's rebuild time. I'm really really bummed about it, but I've decided to look at it as an opportunity.

Busted up piston skirt. Busted by the oil pump drive I thought was safe in the bottom of the pan. Fail.
Still, if I HAVE to buy pistons, I suppose it wouldn't hurt to buy some -3cc domed KB's. If I HAVE to have the heads off, I get a chance to port the GT40 heads and intake. If I HAVE to have the crank out, I might as well have it polished and precision balanced with those KB pistons, you get the idea. Anybody have a TFS stage 1 cam they're looking to get rid of?

Sudden loss of oil pressure.

Reply #24 – October 20, 2013, 10:18:28 AM

well , there isnt any "real knowing" how this happened,, you can speculate all day long.

did you find the skirt part(s)? does it/they match up to the piston?

like you, id be thinking the whole engine is contaminated, you might have caught it in time but i agree warrants a tear down.

Sudden loss of oil pressure.

Reply #25 – October 20, 2013, 10:19:45 AM

let us know the pn to the oil pan gasket,,,,
i love the oem explorer gaskets and that on you show.

Sudden loss of oil pressure.

Reply #26 – October 20, 2013, 10:43:22 AM

I found several large pieces, but also many small pieces that could pass through the screen. I took the pan off on the stand full, and poured it through a fine mesh filter to find all the particulates. There's no telling where any others might be,

Sudden loss of oil pressure.

Reply #27 – October 20, 2013, 11:06:36 AM

Hopefully id didnt marr up the cylinder wall. Sucks man. Hope everything checks out alright

Sudden loss of oil pressure.

Reply #28 – October 20, 2013, 01:19:35 PM

The cylinder wall on no.2 is scored up and down. Looks like I may end up with a 306. Not necessarily a bad thing.

Sudden loss of oil pressure.

Reply #29 – October 20, 2013, 07:31:50 PM

10 over may be good enough,, we went 20 to get everything roundy again.