1990 Montero 4x4 with Blown Head Gasket and Oil Leak, HELP!
Hello fellow Montero enthusiasts. I need your help!
I have a ‘90 Montero 4x4 that blew a head gasket in January, diagnosed after overheating, stalling, and coolant leaking from the engine bay, 3.0 V6.
A tech performed a leak-down test:
• Cylinder 1: 50% loss, air in coolant reservoir
• Cylinder 3: 33% loss, severe bubbling
• Cylinder 5: 25/35 psi held, coolant puking near the head
All passenger-side cylinders failed; driver’s side passed. Warpage on the passenger head measured .007-.008” (max allowed: .002”), indicating significant damage.
We resurfaced the passenger head, replaced all seals except the rear main, and reinstalled it. After getting it back, I noticed a small oil drip near the exhaust manifold. Now, oil is pouring down from the passenger side, possibly from the forward-most exhaust manifold stud.
The tech didn’t inspect for cracks due to the nonferrous head not being testable with Magnaflux. His plan: remove the stud, coat it with Loctite/Teflon tape, and reinstall.
What would you do? I’m already $12k deep and can’t afford much more. Seeking advice from every expert.
I have a ‘90 Montero 4x4 that blew a head gasket in January, diagnosed after overheating, stalling, and coolant leaking from the engine bay, 3.0 V6.
A tech performed a leak-down test:
• Cylinder 1: 50% loss, air in coolant reservoir
• Cylinder 3: 33% loss, severe bubbling
• Cylinder 5: 25/35 psi held, coolant puking near the head
All passenger-side cylinders failed; driver’s side passed. Warpage on the passenger head measured .007-.008” (max allowed: .002”), indicating significant damage.
We resurfaced the passenger head, replaced all seals except the rear main, and reinstalled it. After getting it back, I noticed a small oil drip near the exhaust manifold. Now, oil is pouring down from the passenger side, possibly from the forward-most exhaust manifold stud.
The tech didn’t inspect for cracks due to the nonferrous head not being testable with Magnaflux. His plan: remove the stud, coat it with Loctite/Teflon tape, and reinstall.
What would you do? I’m already $12k deep and can’t afford much more. Seeking advice from every expert.
Last edited by MonteroVictim#1013; Mar 18, 2025 at 06:03 PM.
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