Restore oil treatment blows head gasket
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#207
All I have to do is install the induction system and check all the hoses, water & vacuum.
I am going to use diesel oil for the first 500 miles to clean up all the crap in the engine, then fill with good oil and restore treatment.
Biggest surprise so far was that the heads went on very easily and thank god I bagged all the screws.
I did replace some screws with stainless socket head cap screws to clean it up. pictures to follow when I have finished all the assembly.
I am going to use diesel oil for the first 500 miles to clean up all the crap in the engine, then fill with good oil and restore treatment.
Biggest surprise so far was that the heads went on very easily and thank god I bagged all the screws.
I did replace some screws with stainless socket head cap screws to clean it up. pictures to follow when I have finished all the assembly.
#208
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#212
Update:
Got everything put together. started to turn it over without fuel pump fuses.
Sounded OK a little rattling from chains as the tensioners pumped up.
Put in fuses and started her up. Lots of white plumes of steam on right exhaust and a little surging.
I shut her off and checked the throttle body, it was open too far so I adjusted the cable (the square locator had turned too far and was holding throttle open)
I pulled the plugs on the passenger side and the rear most plug gap was closed and there is a gouge on the electrode prong. This cylinder looks damp but not wet, coolant level looks like it dropped but that could be from air in the system.
So I think I am going to have to pull the head off and investigate.
Please guys any ideas, I am really getting frustrated
Got everything put together. started to turn it over without fuel pump fuses.
Sounded OK a little rattling from chains as the tensioners pumped up.
Put in fuses and started her up. Lots of white plumes of steam on right exhaust and a little surging.
I shut her off and checked the throttle body, it was open too far so I adjusted the cable (the square locator had turned too far and was holding throttle open)
I pulled the plugs on the passenger side and the rear most plug gap was closed and there is a gouge on the electrode prong. This cylinder looks damp but not wet, coolant level looks like it dropped but that could be from air in the system.
So I think I am going to have to pull the head off and investigate.
Please guys any ideas, I am really getting frustrated
Last edited by Roger77; 03-15-2013 at 10:35 PM. Reason: bad grammer
#213
Instead of pulling the head, you can first try:
-- compression test
-- leakdown test
-- coolant pressure tester
also turn over engine by hand looking for interference. put a new plug in first so that you can see if you get a new mark on the electrode or the electrode closes again.
What exact sparkplug number are you using?
How did you time the engine?
What was your head bolt torquing sequence and procedure?
Did you measure the head and block deck for straightness and what measurements did you get?
What finish is on the cylinder head and block mating surfaces?
-- compression test
-- leakdown test
-- coolant pressure tester
also turn over engine by hand looking for interference. put a new plug in first so that you can see if you get a new mark on the electrode or the electrode closes again.
What exact sparkplug number are you using?
How did you time the engine?
What was your head bolt torquing sequence and procedure?
Did you measure the head and block deck for straightness and what measurements did you get?
What finish is on the cylinder head and block mating surfaces?
Last edited by plums; 03-04-2013 at 09:53 PM.
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Roger77 (03-05-2013)
#214
When I put mine all back together, it sounded like sh*t for about 10 seconds or so and then smoothed out... Was there any coolant in the cylinders when you put it back together? It might just be burning it off.
Thats really odd... As mentioned above, try putting another plug in.
I pulled the plugs on the passenger side and the rear most plug gap was closed and there is a gouge on the electrode prong.
#215
It's entirely possible that coolant spilled into the exhaust while dismantling the engine. This takes a while to burn off.
The spark plug I cannot account for but am hoping that youu just banged it while puttin things together. Nothing you did should have cause anything to be hitting the plug.
A leakdown test and/or a borescope will tell you more.
Fingers are crossed for you.
The spark plug I cannot account for but am hoping that youu just banged it while puttin things together. Nothing you did should have cause anything to be hitting the plug.
A leakdown test and/or a borescope will tell you more.
Fingers are crossed for you.
The following users liked this post:
Roger77 (03-05-2013)
#216
#217
Update
I ran a compression check ,
Drivers side front to back 105,105,120,105
Pass side front to back 120, 120,130, 0
So off with the head. it only took 4 hours this time.
This is what happened.
The retainers popped off an intake valve, that bent the valve and the retainers stayed in the cup and got crushed, the piston is dented but the cylinder bore looks like there is no damage.
I'm off to the dealer in the morning for a new valve and retainers.
A very close friend said he always hits the valve tip with a soft hammer to make sure the retainers are set in place. (a bit late for that advice)
I'm happy with 120 psi on some cylinders but a bit worried about the 105's on the drivers side.
I need this advice:
Do I use new head gaskets?
Do I need to worry about the dings in the piston?
what might be causing the low compression ?
Interesting that it was pretty even on both sides,
Maybe I did a better job of valve lapping on 1 side (I did the passenger side last)
I'm so tired that photos will follow tomorrow, I'm drinking a glass of wine thinking, I was lucky on my first rebuild, and how did I F*** up on 1 valve when I had already done 31 others.
Oh well if it was easy everyone would be doing it....
I ran a compression check ,
Drivers side front to back 105,105,120,105
Pass side front to back 120, 120,130, 0
So off with the head. it only took 4 hours this time.
This is what happened.
The retainers popped off an intake valve, that bent the valve and the retainers stayed in the cup and got crushed, the piston is dented but the cylinder bore looks like there is no damage.
I'm off to the dealer in the morning for a new valve and retainers.
A very close friend said he always hits the valve tip with a soft hammer to make sure the retainers are set in place. (a bit late for that advice)
I'm happy with 120 psi on some cylinders but a bit worried about the 105's on the drivers side.
I need this advice:
Do I use new head gaskets?
Do I need to worry about the dings in the piston?
what might be causing the low compression ?
Interesting that it was pretty even on both sides,
Maybe I did a better job of valve lapping on 1 side (I did the passenger side last)
I'm so tired that photos will follow tomorrow, I'm drinking a glass of wine thinking, I was lucky on my first rebuild, and how did I F*** up on 1 valve when I had already done 31 others.
Oh well if it was easy everyone would be doing it....
#218
I wouldn't be particularly worried about the ding in the piston so long as it is still holding.
If it has sharp edges, round off the edges to avoid them being hot spots causing pre-ignition.
A wet compression test might have told you whether it was rings. But, the head is already off.
I would be very tempted to use new head gaskets. It sucks, but so does a blown gasket.
In the V6 section of the engine manual is a very interesting difference in the torquing procedure. It is the same, except that the first torque by force operation is done, then the bolts are backed off 360 degress, then torque by force again, then the two 90 degree operations. I like it. As you know, I like to let things "settle" between each stage. Your engine though.
If it has sharp edges, round off the edges to avoid them being hot spots causing pre-ignition.
A wet compression test might have told you whether it was rings. But, the head is already off.
I would be very tempted to use new head gaskets. It sucks, but so does a blown gasket.
In the V6 section of the engine manual is a very interesting difference in the torquing procedure. It is the same, except that the first torque by force operation is done, then the bolts are backed off 360 degress, then torque by force again, then the two 90 degree operations. I like it. As you know, I like to let things "settle" between each stage. Your engine though.
#219