Neglected LDS-465-1 peace of mind check and freshen

[Davidwyby]

Hi all. My truck was abused and neglected as a civilian water truck on a farm for years, and then left to sit a few more. I want to go through the engine and make sure it's in good shape before I go any further with the rest of the project and am trying to decide how deep to go.

Planning on the standard fuel system cleaning, fluids and filters, water pump and radiator leaks, check thermostat, need to adjust valves.
Wondering about maybe pulling the intake (and what else?) to check for coolant corrosion as my oil cooler housing was corroded through.
Planning to remove and test injectors, inspect cylinders with bore scope.

Maybe pull the oil pan, maybe install better rod bolts.
Maybe even the heads, or maybe just a retorque?
Rebuild date of '72, would those be the "new" gaskets?

Head oil leak here maybe?



Anything anyone can think of to check or correct I'd appreciate.

Lastly, for the heartbreaker.

My "hot rod" LDS has been neutered by someone installing an LD injection pump. Eventually, I will be installing boost and pyro gauges and seeing what I can do to make the best of it. Turn the fuel up, maybe advance and governor springs...

Thanks all.

 

[Flyingvan911]

If you get a LDS injector pump you won't need to turn the fuel up.

 

[gimpyrobb]

Truth be told, I'd just run it.

To get the intake off, you have to pull the exhaust. Its a real PITA.
Is your motor an LDS a1 or an LDS427? makes a difference.
If it runs ok I'd just re-torque everything and run it.

 

[RAYZER]

What gimpyrobb said.
Maybe do a compression test while the injectors are out being checked.

 

[Davidwyby]

gimpyrobb, that's kinda what I thought (I have been running it around the yard a bit, feels a little weak maybe) but whatever I can do easy enough to get some hope it's not gonna go poof on me would be nice.


Rayzer, thank you, good idea on the compression, I should have thought of that. I'll try to go educate myself on how to adapt my tester to it.

Was gonna adjust the valves today and run it with the cover off to check oil flow over them after.


LDS 465-1A per rebuild tag. Pretty sure it was an A1 with 427 originally. If you haven't seen it, I have the thread on it in the Deuce section. Air filter had 4# of dirt in it, etc....

Nother thread around here in the 5 ton section where I was trying to decipher what the Xs refer (rods, mains, etc.)to on my tag. Haven't heard back from the MV tag guy.






Thank you

 

[gimpyrobb]

I'm pretty sure it didn't start as a 427, they have a smaller bore.

 

[Davidwyby]

Sorry, meant to say that I think the truck started as a 427.

 

[Davidwyby]

Found the compression test in the LDS 427 manual pages 143, 144 by hitting CTRL F and searching for tester, finding the tester part number, and searching for that number. Had fits trying to copy and paste out of the TM or screen shot. Here's the basics.

At operating temp :

C . (B) Connect com-
pression tester gage -10899180 and
coupling -10899184 to the adapter -
10899183 and tighten the connection
securely. (C) Crank engine several
(1)
(2)
seconds at 150 to 180 rpm using the
starter motor. Observe cylinder
compression reading on gage. Cylinder
compression should be from 500 to 550
psi at engine cranking speed. (D) De-
press pressure gage vent to release
pressure to reset gage to zero reading
after first test. Release gage vent and
for figures 148 and 149 (par. 83).
repeat test.

pg143


Note. Compression pressure readings
between cylinders Should not vary more
than 25 psi and pressure should not
fall below 475 psi.

 

[RAYZER]

Here's a compression tester I put together.View attachment 547168View attachment 547167

 

[Davidwyby]

I think I saw yours somewhere while I was searching the forum for the procedure already, saved the pic, thanks. Your linky no worky though.

I think I will use one of my injector holders while I have them out, as I don't have an extra. Sure wish I had and extra blown up engine around to rob parts off of and check things. Probably shouldn't wish for that...

I need to start compiling info on LDS/LDT pump and engine differences...I think I might be scratching the surface. Has anyone already started collecting info?

Initial timing, when advance mechanism timing starts coming in, fuel rates etc...

 

[RAYZER]

I'll try again.

 

[gimpyrobb]

Here's a compression tester I put together.View attachment 547168View attachment 547167

Attachment no worky!

 

[gimpyrobb]

Nevermind, missed page 2!!!!!

 

[Flyingvan911]

There's a lengthy thread about the differences between the LDT and LDS. Search "LDT LDS real differences".

 

[Davidwyby]

There's a lengthy thread about the differences between the LDT and LDS. Search "LDT LDS real differences".

I've been working on it. I'm about halfway through I think. I'm mostly trying to nail down specific differences in the pumps so that I can make the best of my pump without spending a grand or two on the correct pump for the LDS.

Thanks

 

[fuzzytoaster]

Have a CO2 extinguisher on hand and ready when firing her up. A few stories on SS go to show one in the right place would have saved the engine and one from kicking him/her self in the butt afterwards.

 

[Davidwyby]

Gotcha. She's been runnin a couple weeks. Adjusted the valves tonight, some were very loose, purrs now. might check out my threads in the deuce section, kind of an interesting truck IMO, but I'm biased.

EDIT-thread in my sig