Build Isuzu 4BD1T Lexus LX450 (Land Cruiser) Build
- Thread starter Wheelingnoob
- Start date
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- Thread starter
- #1,222
Nope, no way to do it driving. I have no soot or exhaust smells in the cooling system or overflow bottle.
Its the origonal that I got with the engine. No known history. It did spend a few days in my failed vinagar mix for eliminating rust. That very well may have compromised the seal or weakend it.
Im going to try taking off the belts tomorrow and see if I still have bubbles when running (not a long test).
Jeremy
- Thread starter
- #1,223
Well I got it fully warmed up it makes bubbles with the waterpump running we know and with the belts disconnected it makes bubbles still. So I guess that only leaves me with HG or head 
Not the christmas magic I was hoping for. sigh
Not the christmas magic I was hoping for. sigh
Bummer!
With the water pump out of the loop and pressure is getting into the cooling system, it's either compression/combustion or boost.
You may have a crack in the intake runner to water jacket, hence no combustion gas? I know, no help, but the cause is narrowing.
As a test, remove the rocker assy, so all valves are closed. Then pressurize the intake and see if bubbles appear. I wont take long and only needs to be 25 psi or so. Mat be an easy way to find out if the head is cracked in an area you can't see very well.
With the water pump out of the loop and pressure is getting into the cooling system, it's either compression/combustion or boost.
You may have a crack in the intake runner to water jacket, hence no combustion gas? I know, no help, but the cause is narrowing.
As a test, remove the rocker assy, so all valves are closed. Then pressurize the intake and see if bubbles appear. I wont take long and only needs to be 25 psi or so. Mat be an easy way to find out if the head is cracked in an area you can't see very well.
- Thread starter
- #1,225
The way this swap has gone im not suprised!
Yeah I can spend a few more hours narrowing down the exact location but at this pojt I know the head is comming off. I would rather focus my limited time on just getting it off and out for testing. I dont think its intake air getting in there becosuse at idle there is no boost to force air in. It also bubbles for a few min after being run and if it was intake pressure that is gone almost right away after shutdown. Compression presseure will slowly bleed out of the cylinder in this case into the cooling system.
Im going to run it for a couple more weeks just to get through the holidays then start the teardown.
What a bummer, was so hoping you wouldn't be pulling the head.
Sorry man. Super lame.
Have you ran the truck with the pressure tester attached to see what kinda pressure this leak is putting into the system?
- Thread starter
- #1,229
Not really, I had a pressure guage on the system and it builds to rad cap open pressure with in about 5min cold.
- Thread starter
- #1,230
It looks like I may have finished it off yesterday in frustration. I drove the snot out it. Did 3-4 0-60 runs back to back. Went up a fairly long hill at full throttle accelerating and generally beat snot out of it. When I got home I have a waterfall out of the front from the over flow as the engine evacuated its self of all coolant.
Plan to re fill it tonight and take it out snow wheeling tomorrow. Well see if it ends up at the bottom of a cliff somewhere. Lol
Plan to re fill it tonight and take it out snow wheeling tomorrow. Well see if it ends up at the bottom of a cliff somewhere. Lol
I've driven mine 300km home with a bodged radiator hose and refilling it whenever the temp gauge dropped to zero (no coolant in thermostat housing). Replaced the hose, refilled and no related problems.
So don't worry about causing more damage. Just worry about the original leak!
So don't worry about causing more damage. Just worry about the original leak!
- Thread starter
- #1,232
Yeah im not too concerend at this point. I have a 5 gallon jerry full of water if needed.
Im going to start pulling the head after the hollidays. My hope is that maybe the issue will get wores so its obvious when I pull it appart.
Im going to send the head out to get checked as well. Just to eliminate it as a possibility.
Would you still send the head out even if you see an obvious problem with the HG?
- Thread starter
- #1,234
At this stage yes, I do not want to be pulling the head a 3rd time.
- Thread starter
- #1,235
Well I got 45kms into my trip and am now on the side of a road waiting for a tow truck. The coolant got blown out on a hill and now when its refilled and I stsrt the engine it will blow the water 4-5ft out of the rad cap opening. So its got compression going directly into the cooling system now unabated.
Well... That's what the weekend is for 
I'm sure you'll have er buttoned up by Monday morning...
Let's hope it's the head gasket only...
I'm sure you'll have er buttoned up by Monday morning...
Let's hope it's the head gasket only...
- Thread starter
- #1,237
Na im going away for a few days. Im going to wait till I have all the parts before I take it appart again. Plus the head needs to be sent out for testing as well. May have it back on the road by Feb.Well... That's what the weekend is for
I'm sure you'll have er buttoned up by Monday morning...
Let's hope it's the head gasket only...
Did you end up machining the deck? I remember seeing a gouge in some of your earlier posts...
- Thread starter
- #1,239
No I replaced the cylender liners so the cylender seals against the slightly rased cylender sleeve. The gouge is still in the deck but did not cross any oil or coolant galeries. If I need to pull the entire engine again ill probubly put something else in.