F150 cooling question

[Aquamaniac]

Hey folks,
Tried to help a buddy with a a F150 that had been in storage for 9 months.
Started and ran fine....except for minor detail.......it was not pissing.
This was on the muffs. Tried flushing through port (motor off) and water exited through exhaust and lower unit, but not through pisser as it normally did.
Removed hose from top of heat exchanger and blew air with compressor successfully though it to the flush hose...also through from pisser to the top of the heat exchanger. So seems 'clear'......
Still no flow through pisser when water hose hooked to flush. Took off thermostat and it was salted up a bit ( he claims to flush each time). Cleaned it and port up, tested Tstat in hot water....opens. Replaced. Still only water exiting below when flushing, not through pisser. Nor any water through pisser when idling on the muffs...or even both flush port and muffs. He notes that it would piss within a few seconds previously.
So.......inquiring minds want to know.....what's up with that????????
Any thoughts/advice appreciated!!!!
Thanks.

[Aquamaniac]

Forgot to mention that I have at least tried to read through several threads here on cooling systems....all educational, but did not find a good answer. Hopefully someone can explain why water would find its way from flush 'south' to lower unit, but not 'north' to through head passages and out pisser when air does.
Thanks again.

[TownsendsFJR1300]

Sounds like there's still crap/salt clogging up a hose somewhere..

It should piss not running with the small flushing attachment hose hooked up and water on.

And yes, on muffs, start pissing (running) within 4-5 seconds tops (at least mine does).

I would probably start at the pisser itself and work backwards from there till you find the clog.

PM sent as well

[pstephens46]

My F150 doesn't pee worth a damn on muffs. I use two hoses. One with the muffs and one attached to the flushing fitting. Works every time. Try that before chasing any more issues. Or put it in the water....

Trying to read post....maybe you tried two hoses already?

[Aquamaniac]

T: thanks, I will have to give it a try again tomorrow. Sure did not make sense if compressed air would pass entire 'circuit', why water would not.....unless I was missing part of the path some how. Began to ponder if somehow the water was 'bleeding off' via an excessively lower pressure route to the LU and unable to create enough pressure to travel through seemingly open hoses to pisser.

p: yes, I did try both muffs and flush unit (2 hoses) at same time when idling.....but no flow at pisser. Familiar with F150 pissing well in the water, but not on muffs.

[TownsendsFJR1300]

I forgot if the fuel cooler would have any effect on the tell tale. As noted in my PM, it's on the starboard side with 4 hoses going into and out of it.

It wouldn't hurt to remove the water side and make sure it's clear.

Here a video of mine, only on muffs and it'll run all day on muffs, no overheat, pisser always pissing. I JUST replaced the WP (with a kit) and the stream is slightly stronger now (vs the video).

1st Link, Flushing F150 Video by SRT-60 | Photobucket

[HMBJack]

I have the same thing with my 2012 F150.

What works for me is to throttle up the engine - just slightly - like from idle to say 1,000 or 1,200 RPM's. Once I throttle up to 1,000 or so RPM's for just a second or two, I pull it back down to idle. Pee stream always comes after that. Might be a water pressure thing, not sure.

Good luck!

[TownsendsFJR1300]

Any updates?

[Aquamaniac]

Took hoses back apart yesterday to be sure compressed air passed. It did.
Still no flow though through pisser with flush while motor off.
Told him to put it in the water and try it.
I suspect it might simply be a case of not enough water pressure through hoses, but we shall see. He should splash it today. Will let you know.
Thanks!

[TownsendsFJR1300]

Thanks for the update but I don't think your successful.

In my engine, just on the flushing attachment, once the block fills up, (not running), the pisser works...

Maybe I have more WP/volume.

I forgot what the guys were using to shove upwards into the pisser to clear it.

Wether it was heavy fishing line or light SS fishing line. Doing this while the engine is running should help clear it.

I'd probably pull the hose from the pisser(while running in the water) and keep going until I "hit water"...

I gather the actual plastic tip of the tell tall was visibly checked and light can be seen thru it

[99yam40]

If a bug built a nest in it the weed wacker line trick usually works. but if plugged in deep inside, then compressed air will make it around all the bends to push debris out of the way , try that while running on muffs of hose attachment

[TownsendsFJR1300]

If a bug built a nest in it the weed wacker line trick usually works. but if plugged in deep inside, then compressed air will make it around all the bends to push debris out of the way , try that while running on muffs of hose attachment

Forgot about the weed eater line, but plus 1 on that!!

[Aquamaniac]

Good news!
He put it in the water. Did not do much until he bumped it to 1200 rpm. Fine stream then, even back at idle.
I had indeed checked from tip of pisser, through fuel heat exchanger, and all the way to flush input hose. Clear with compressed air noted from one end to the other!
Looks like it was just not enough water pressure/volume on hose.
Interesting that he says it pissed fine with just the flush hose previously.
Go figure.
At the end of the day, he is happy and back on the water.
Sure appreciate the help folks. Thanks!

[TownsendsFJR1300]

Glad it's working.

Not noted is how old is the water pump? They WILL take a set, especially with much sitting.

The WP isn't hard to do and it wouldn't hurt to re-grease the mid section bushing/splines.

Mine was pissing good but the impeller was getting old. I did find half the veins had a set so it was definitely due... It visibly pumps more water now..

[Aquamaniac]

I advised him he might want to service LU. He is not much of a wrencher, so I suspect I might be 'involved'. Turns out this is a fairly new motor....so he may be due for service anyway 😎