This may be wrong thinking all together but there are no leaks i would think that much missing would be noticed. No poor running no extra smoke... None in oil no bubbles in Over flow resovore? Have you tried to fill it up again and see if it stays full? What if while you were running it down the road lets say you lost some out of a hose that wasent sealed up 100% but now it is and or the leak does not happen at idle or till its ran or ran hard? Just a thought i had..
1953 F250 Powerstroke RatRod
- Thread starter Skill_Kills
- Start date
bluedge8
Active member
You could try harbor freight. I think I'll have a little time this Saturday if your intrested
You can rent a coolant pressure tester at Oriellys
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Skill_Kills
Member
Just tee into the hose coming out of the right side of the degas. Don't cut the hose just add a short section and a tee then adapt to a air chuck fitting.
Might try that if i dont get into town today. going to warm it up and re torque the studs once i find where all the coolant went (most likely out the cap). I ordered a compression tester which should hopefully come next week.
Worst case scenarios for this are a messed up head or blown head gasket on the drivers side. the passenger side i can do right where its at but everythings so tight on the drivers side that the cab will have to come off to slide the head off the studs
broke an electrode off in my plasma torch on thursday so no more work on the box and stuff for a bit =(
Skill_Kills
Member
1:270
2:350
3:325
4:380
5:320
6:380
7:340
8:320
There's a hissing noise near #1 when I stop cranking. Gonna start pulling the head tomorrow
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2:350
3:325
4:380
5:320
6:380
7:340
8:320
There's a hissing noise near #1 when I stop cranking. Gonna start pulling the head tomorrow
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morefuel
New member
Probly have to pull the head anyways, but you could make sure both valves are closed and put air pressure to the cylinder. Then listen and see if it comes from the intake or exhaust to see if its valves.
bluedge8
Active member
Generally before you pull the head you want to see where the problem is. like said above pull the valve train and fit an air chuck to the glow plug hole and try to Identify the source of the leak.
DZL JIM
Member
We just had a truck with a crack in the head that smoked like crazy and only lost a gallon or so in 1/2 hour of driving. So if you don't have any smoke, my guess is it's not being burnt in a cylinder.
We also have had plenty of 7.3 trucks be a complete pain to bleed the cooling system properly. Get an old t-stat and drill a big hole in it (or gut it?) and drive the truck, see if coolant goes down then. If not, you know it's a bleeding/burping issue.
We also have had plenty of 7.3 trucks be a complete pain to bleed the cooling system properly. Get an old t-stat and drill a big hole in it (or gut it?) and drive the truck, see if coolant goes down then. If not, you know it's a bleeding/burping issue.
Skill_Kills
Member
Well, there's no white smoke except for maybe a small puff at startup so its not burning it and theres none in the oil so it all had to come out the cap. When doing the compression test I could hear gurgling after testing #1 I went back and took another reading and now there's nothing on cyl 1 so the head is coming off and getting checked before it goes back on. Already have a gasket coming from riffraff
It'll be interesting to find out why #1 has no compression. That gasket is either pretty dang messed up or theres a big hole somewhere lol
It'll be interesting to find out why #1 has no compression. That gasket is either pretty dang messed up or theres a big hole somewhere lol
Last edited:
bluedge8
Active member
what about a valve hanging up? would you be interested in setting up a leakdown tester before you pull the head? When are you working on it next?
^this. You most likely wouldnt even have to spend anymore money. Most compression testers have a normal air chuck fitting for the gauge, at least mine do. Just pull the schrader valve out of the adapter, turn it over to #1tdc compression, and hook ot to air. If its got no compression, you dont need a gauge to tell you percent leakage.
Check oil fill, degas, intake, and exhaust pipe for any air sounds.
Skill_Kills
Member
All the pressure was going straight into the cooling system. Head is off now. Nothing super apparent looking with the gasket. Going to clean up the head and get it checked out
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Strokersace
Well-known member
SMH...
Skill_Kills
Member
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bluedge8
Active member
did you have to make an adapter for the compression tester? Are you thinking head gasket?
Skill_Kills
Member
Ended up getting a mightyvac tester and adapter. Just used a rubber tipped nozzle to blow air in it. Thinking its a cracked head since the gasket looks decent. Brought the head in today so they'll take a look at it next week
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Skill_Kills
Member
took a look at it again today after work and my cousin and i found a spot that didnt quite look right. looked like one passage near #1 wasnt sealed up quite right because the gasket hadnt left any material on the mating surface like everywhere else. maybe it was that, maybe it wasnt. Til the head gets checked I'll keep spreading manure on the fields and chip away at the rest of the wiring
Skill_Kills
Member
Got the head back yesterday. flattened and 4 new inj cups in it. should be able to start putting it back in tonight and hopefully get all the way to doing a hot retorque on the studs by the end of the weekend
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