So the 79 351m just doesn't wanna be on the road ever. Today while changing the steering shaft we pulled the dipstick tube, afterward a ton of milky oil came out of the pan. Now I'm frustrated here's a run down on the oil history

Last oil change 2006
2006-2008 driven approx 1000 miles never any signs of problems mostly driven locally about 1 day a month

I sold it 2008 it was drove 10 miles parked
New owner replaced intake manifold with a performer intake messed up wiring and never restarted the truck
2008 -2010 truck sat

2010 I got the truck back fixed the wiring have been fixing problems and replacing parts since. Started the truck in 2010 for 2 mins. Started again this year 2 times for about 15 mins each idle only didn't notice any tell tale signs of head gasket.


Now the PO that installed the intake wasn't very good at working on cars I'm wondering if he screwed up the intake gaskets. I have been repairing his mistakes for 2 years was really hoping this was done right. Or could it be condensation ? Truck has sat along time or maybe the coolant got in the oil during the intake install. The coolant seems to be fine.


Here the pic of my garage floor ps yeap it's always all damp

 

Sorry to say but that ain't condensation. Time to pull and re-do the intake (at the least).

I hate fixing other people's crappy workmanship.

 

Yep, that is not condensation. You have a water leak somewhere. Before tearing it down get a pressure gauge and check the cooling system to see if you can locate where it is leaking.

 

Yeah I knew condensation was just out if the question the way that oil looked. I'm so frustrated. The amount of work and money I have put back into this thing just to get it to drive again. I should have bought a rust free southern truck lol cause this thing is rusty too

What's the proper way to check for a leak I have a couple compression gauges but only have used them for checking head gaskets not intake

 

The 351 M has a dry intake, you can pull it off without draining the radiator, and won't loose a drop. Pull the plugs and see if any have coolant on them, or look rusty, good chance its a head gasket, but it could've sat where water could run into the pvc, or seep through a valve cover gasket.

 

Well damn I thought they had a wet intake Now I did find acorns in the rad lol

 

That's a lot of water in the oil. Change the oil and ruun iit again for a bit and see what happens. Who knows, could have ingested a couple quarts for an excessive engine wash. But like fordgirl said its a dry intake. Do a compression/bleed down test. Not sure where you're at but If it has been Sitting that long and that PO was a retard that at some point only put water in the radiator and the block frzen you could be looking at a Cracked block. Yes I know they have freeze plugs, but I have seen it many times.

 

Yeah kinda worried that might be the case

 

Advance Auto Parts has a tool set in the "Loaner Tool Program" just for pressure testing cooling systems, it'll let you pump the system up and watch to see if it holds. You pay for it but then you get full credit or refund when you return it whole. Not sure about Auto Zone, etc.

On a 351M / 400 you can even pull the intake and still test, you may find a crack in the block wall behind the push rods from freeze ... or maybe a leaking head gasket ... or maybe a rusty steel plate that resides between the water pump and timing chain cavity.

One good thing, 351M and 400 both use same block.

 

I was looking at some images are we sure the 351m is a dry intake I'm gonna pressure the cooling system tomorrow

 

Yes it is dry.

 

So even if the intake was installed wrong its most likely something else

 

Oh I pulled the plugs today all seem 100% normal none looked to steamed cleaned

 

Pressurized the system today went a lil high 16 lbs for 15 mins with no pressure drop hmm what could it be

 

I'm gonna do an oil change and run it again for 15 mins we shall see what shades the oil wants to turn next. Any suggestions on anything to aid in cleaning the oil system out. And from my previous post does anyone have any other suggestions or thoughts