Cat_man320
Well-Known Member
Asking for a friend . He got a 3126 in a Chevy Topkick single axle dump truck . After the engine reaches operating temp , it will shut off and is hard to start . Wait 15 minutes and it will start again . It runs ok when running down the road. he has installed new injectors and tubes , changed the huey pump and lift pump. Oil pressure is low at idle when up to operating temp . I think he said 14psi at idle . he also changed oil pump. He is at a loss to know what the trouble is or where to turn to to fix it. Any of you guys that know 3126 cat engines can help this young lad. I'm thinking maybe rod bearings or main bearings. Any help would be great .