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Discussion Starter · #1 ·
I use a Nissan navara 2008 model. Lately the speed is low with heavy black smoke from the exhaust and when my car goes beyond 100km/hr the overheating gauge rises almost hitting the red. I don’t know what the problem is?
 

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Welcome to the forum.

It could be a number of things. Did the overheating and black smoke start at the same time?
 

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Discussion Starter · #3 ·
Welcome to the forum.

It could be a number of things. Did the overheating and black smoke start at the same time?
I can’t tell exactly, I only discovered the overheating when I I had to travel hence going beyond 100km/hr but it started about the same time
 

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I was thinking a blocked radiator (not uncommon) would cause overheating, but not black smoke.
A faulty boost control solenoid would cause large amounts of black smoke, but not overheating.
A faulty head gasket could cause both.
 

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Discussion Starter · #5 ·
I was thinking a blocked radiator (not uncommon) would cause overheating, but not black smoke.
A faulty boost control solenoid would cause large amounts of black smoke, but not overheating.
A faulty head gasket could cause both.
I will check the head Gasket
I have Already replaced the Radiator and the boost control solenoid.
 
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