1999 4.3 Volvo Penta Gi overheating issue

[Jhm1992]

I have a 1999 4.3 Volvo Penta engine which had a bad oil pressure sensor so 1 fuel injector would stop spraying around 2500 rpm. I changed out the oil pressure sensor and now the fuel injectors are working just fine but all of a sudden it is overheating. I don't even know where to start checking for the problem. I would greatly appreciate any advice to help me find the issue. Thanks in advance.

 

[Scott Danforth]

Start with the impeller

 

[Jhm1992]

I just changed that a few days ago.

 

[Scott Danforth]

did you backflush the system to remove and broken pieces of impeller or to clean out the power steering cooler?

 

[Jhm1992]

When you say backflush do you mean run water through the hoses? Because I took most of them apart and cleaned them out.