dubyagee01
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If I remember correctly, the way the EGR system works, it dumps unevenly into the intake. Some ports get coated. Check the intake.
Blown head gasket/Cracked head/tired of mechanics
- Thread starter bigfootchiro
- Start date
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If I remember correctly, the way the EGR system works, it dumps unevenly into the intake. Some ports get coated. Check the intake.
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bigfootchiro
Full Access Member
The burnt valves are Cylinder 4. 
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bigfootchiro
Full Access Member
Found all this oil under the plenum. The large drop of oil being next to cylinder 2 and 4 injectors.
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bigfootchiro
Full Access Member
This little guy was stuck on the bottom of the head, possibly causing a leak
And this white substance was on the block side of the intake, back toward cylinder 7.
And this white substance was on the block side of the intake, back toward cylinder 7.
Tonyrodz
Resident Resident
Is that white substance from coolant?
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bigfootchiro
Full Access Member
That’s what I don’t know. The back side of the block was a little rusted under the intake.
Tonyrodz
Resident Resident
I bet it's from water(coolant). Possibly from when aluminum gets oxidized. Block being rusty proves water was around. That's what happens instead of rust. Thoughts?
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swathdiver
Full Access Member
Air pocket.
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bigfootchiro
Full Access Member
I was going to say oxidation but not sure how that would happen. Any thoughts on the head pictures guys? I’m hoping the valve seals on Cylinder 4 are what’s causing them to be burnt and the low compression. Also, Cylinder 7 valves are slightly pink, also pink around all 4 plug tips on that side. Not a lot, but definitely noticeable.
swathdiver
Full Access Member
Noticed that too, seems like the head gasket was blown there too. Well, what are you going to do? Get new heads or overhaul these? Do they still do 3 angle valve jobs?
How's the block (pistons, rings, crank and bearings) and intake?
How's the block (pistons, rings, crank and bearings) and intake?
