Need advice with my 1992 F250 7.3 IDI

Nick382

Full Access Member
Joined
Jul 26, 2017
Posts
195
Reaction score
21
Location
Ohio
How would I keep the precup from filling with that crud?


Sent from my iPhone using Tapatalk
 

Thatoneguy

Full Access Member
Joined
Jul 10, 2017
Posts
615
Reaction score
130
Location
Boerne, Texas
I think (totally guessing) that you should be more concerned with how you're going to get what IS going to fall in there out... And I have no idea for that lol. I would say you could try removing the glow plug a put high pressure air going from there through it and maybe be able to blow some of it back the other way if the pressure is high enough. Use duct tape or something to funnel all the air you can get through the glow plug hole. ?????
 

Nick382

Full Access Member
Joined
Jul 26, 2017
Posts
195
Reaction score
21
Location
Ohio
I think (totally guessing) that you should be more concerned with how you're going to get what IS going to fall in there out... And I have no idea for that lol. I would say you could try removing the glow plug a put high pressure air going from there through it and maybe be able to blow some of it back the other way if the pressure is high enough. Use duct tape or something to funnel all the air you can get through the glow plug hole. ?????
In reading that guide, he discusses some precautions with that. Thanks for the Info guys!


Sent from my iPhone using Tapatalk
 

Nick382

Full Access Member
Joined
Jul 26, 2017
Posts
195
Reaction score
21
Location
Ohio
A couple of issues I'd like to address before the pump is on it's way back. Shipping is going to take around 3-4 days one way, so I have time. Primarily involving the braking system which has seen MUCH better days, batteries, and...

Oil leaks!

I believe the two most troublesome leaks I have at the moment are the Oil cooler, (which I have a felpro seal kit for,) and the front main seal behind the harmonic balancer. For this front main seal, I am unsure if I can use the speedisleeve, or if I have to get a new balancer as discussed here (http://www.thedieselstop.com/forums/f28/front-crank-seal-218923/) I can take some crappy pictures to show everyone the evidence, and see if my diagnosis is correct. The good news is I don't have oil communicating with coolant, or coolant with oil. But there is a stupid amount of oil on / near my oil filter.

You must be registered for see images attach
You must be registered for see images attach


Are there any other reasonably simple seals that I should go ahead and replace while the truck can't run and I have the coolant / oil drained?
 
Last edited:

rempfer

Registered User
Joined
Jul 5, 2015
Posts
58
Reaction score
6
Location
Elma Washington USA
I needed to replace the left rocker cover gasket to cure the oil running down the block onto the filter problem. From your picture, it doesn't appear the oil is coming from the filter not seating, or at least not ONLY from there.
 

Nick382

Full Access Member
Joined
Jul 26, 2017
Posts
195
Reaction score
21
Location
Ohio
I needed to replace the left rocker cover gasket to cure the oil running down the block onto the filter problem. From your picture, it doesn't appear the oil is coming from the filter not seating, or at least not ONLY from there.
So that's a valve cover gasket then? I'll have to order a couple in. The filter was just installed, so I don't think it's coming from there. Is filthy even above that, which lead me to believe the oil cooler is at least one of the offenders here.


Sent from my iPhone using Tapatalk
 

rempfer

Registered User
Joined
Jul 5, 2015
Posts
58
Reaction score
6
Location
Elma Washington USA
So that's a valve cover gasket then? I'll have to order a couple in. The filter was just installed, so I don't think it's coming from there. Is filthy even above that, which lead me to believe the oil cooler is at least one of the offenders here.


Sent from my iPhone using Tapatalk
I can only say in my case it was...
 

Nick382

Full Access Member
Joined
Jul 26, 2017
Posts
195
Reaction score
21
Location
Ohio
I can only say in my case it was...
Do you have any knowledge on the front main seal? I'm hesitant to buy the seal when the tool to install it is $100 and then the harmonic balancer is anothe $70 assuming I need to replace it.


Sent from my iPhone using Tapatalk
 

OLDBULL8

Good Morning Ya'll.
Supporting Member
Joined
Feb 12, 2009
Posts
9,923
Reaction score
338
Location
Delphos , Ohio
Where are you at in Ohio? I'm in Delphos OH, 15 miles West of Lima

To clean the injector bore threads, use a 12 Ga. shotgun brush preferably the brass brush, any dirt will collect in the precup, use a shop vac in the injector hole, blow air in the GP hole, the vac will suck all/any dirt out.

When you crank the engine over for compression check, the fuel was coming out the return line because the return line was still connected to the filter.

One pic shows how the IP fuel shutoff is.

Your compression check looks good, specs are from 250 to 450 PSI cold.

Can't comment on your IP, don't know enough about why you think it's bad.

Front seal changing, be careful pulling the damper pulley, it's a two piece with rubber between the outer and inner parts. It's difficult to do without pulling the radiator for room to work.

You must be registered for see images attach


You must be registered for see images attach
 

Nick382

Full Access Member
Joined
Jul 26, 2017
Posts
195
Reaction score
21
Location
Ohio
Where are you at in Ohio? I'm in Delphos OH, 15 miles West of Lima

To clean the injector bore threads, use a 12 Ga. shotgun brush preferably the brass brush, any dirt will collect in the precup, use a shop vac in the injector hole, blow air in the GP hole, the vac will suck all/any dirt out.

When you crank the engine over for compression check, the fuel was coming out the return line because the return line was still connected to the filter.

One pic shows how the IP fuel shutoff is.

Your compression check looks good, specs are from 250 to 450 PSI cold.

Can't comment on your IP, don't know enough about why you think it's bad.

Front seal changing, be careful pulling the damper pulley, it's a two piece with rubber between the outer and inner parts. It's difficult to do without pulling the radiator for room to work.

You must be registered for see images attach


You must be registered for see images attach
I'm in Mount Vernon Ohio. If you'd like to come help, I'd be more than happy to have it; but that's a bit of an adventure at 2 hours. I'll PM you.

Those compression numbers were on a warm-ish engine. Not hot because I waited a while to start the testing.

On the IP; it started cold flawlessly, ran flawlessly, but would NOT restart hot. Water on the radial housing area made it start again. The pump is currently on its way to R&D performance in Washington along with the injectors for replacement/testing.

It sounds crazy, but I'm nearly positive it was delivering fuel. But that's all history now since I've sent off the IP and I'm getting ready to return the compression tester.




Sent from my iPhone using Tapatalk
 

OLDBULL8

Good Morning Ya'll.
Supporting Member
Joined
Feb 12, 2009
Posts
9,923
Reaction score
338
Location
Delphos , Ohio
At 89 yrs old, I don't do work anymore, just advice.

That one injector you showed, it must not have been seated, water got down to it and rusted the barrel, possibly some combustion got up in there also.
 

Nick382

Full Access Member
Joined
Jul 26, 2017
Posts
195
Reaction score
21
Location
Ohio
At 89 yrs old, I don't do work anymore, just advice.

That one injector you showed, it must not have been seated, water got down to it and rusted the barrel, possibly some combustion got up in there also.
Well, that certainly makes sense! I wouldn't work on anything either.

Yeah, a couple others have mentioned that was likely a contributing factor to the injector being rusty.

I'll probably pull the radiator to do the front main seal since I'll have the coolant drained for the oil cooler while I'm at it.

Do you have any experience installing s front main seal without the tool? Seems like people have problems even installing it with the tool.



Sent from my iPhone using Tapatalk
 

Macrobb

Full Access Member
Joined
Jun 12, 2016
Posts
2,380
Reaction score
1,234
Location
North Idaho
Yeah, a couple others have mentioned that was likely a contributing factor to the injector being rusty.
I've seen a number of rusty injectors along with not-so-rusty ones; pretty sure what happens is just water getting on top of the motor(can happen due to a leaky cowl seal, or simply driving in the rain) and slowly works it's way down through the threads. It doesn't take long, either - I've had rust appear after only a few months.

If your combustion seal leaks(copper washer), you'll get black carbon crud up there instead of rust, until it finally seals itself. Not pretty when you see it.

What I do these days is just slather the injector body in high-temp grease. It keeps it nice and clean and rust-free, no matter what happens. Surprisingly, the grease doesn't seem to melt, either.
The same grease is what you want on the injector return O-rings and inside the return cap; works wonders at preventing leaks.


Do you have any experience installing s front main seal without the tool? Seems like people have problems even installing it with the tool.
I pressed one in with a block of wood and an arbor press; you've just got to get it straight.
MAKE SURE you get it in the right way(the "cavity" in the seal towards the inside; pressure pushes against the seal and forces it to actually seal).
If you get it in backwards, it will leak like a sieve.
 

Nick382

Full Access Member
Joined
Jul 26, 2017
Posts
195
Reaction score
21
Location
Ohio
I can only say in my case it was...
I decided to check, and I think mine are also leaking !
You must be registered for see images attach


Thanks for the suggestion!


Sent from my iPhone using Tapatalk
 

Nick382

Full Access Member
Joined
Jul 26, 2017
Posts
195
Reaction score
21
Location
Ohio
Valve cover gaskets came in today. Will be using brake cleaner for the mating surfaces.

Also took a coupe tests of the current coolant.
You must be registered for see images attach
You must be registered for see images attach





Sent from my iPhone using Tapatalk
 

Forum statistics

Threads
91,217
Posts
1,128,517
Members
24,045
Latest member
Ramtough01

Members online

Top