- Jan 14, 2022
- Brooksville FL
Hey 3F-E engine experts, I have a new to me 91' 80 series with a 3F-E with 175k miles. I purchased it as a project with a poorly running engine. upon getting the LC home, cleaning it up and starting to diag. the motor I found Cyl. #6 to have no compression...borescope revealed nothing obvious and the valves appeared closed. So...off came the valve cover and dang....#6 intake pushrod bent and out of the rocker. Valve does not appear stuck and bounces on the spring when tapped with a brass hammer. Also scoped the pushrod hole in hopes to see if the lifter came out of the bore. It looks ok from what I can see which is not much....My question is: Should I just get a new pushrod and install to get it running and see where I'm at? or should I order the lifter too and dig into the side of the lifter cover etc and go quite a bit deeper? can I change the lifter from the Side cover? Are these hydraulic lifters or solid? anybody have any experience with one tossing a pushrod?....History on this truck is that the guy I bought it from only had it for a couple months and purchased it for a father son project and decided to go a different direction. so It sat in a parking garage in Miami for 3 months prior to me taking it over. Before that it was trucked from NC where it was parked for an undisclosed amount of time and for unknown reasons. I am speculating that the pushrod came loose very recently when the Father Son did a cap/rotor/plugs change out and may have overrevved a sticky valve from lack of use before he got it. The reason I say recent is that he told me he did a compression test and got good numbers when he did the plugs(he had no reason to lie to me) also I drove it out of the garage and it barely made it down 7 levels and onto my trailer, we had to push it to get it up. This thing would have never climbed 7 levels of parking garage they way it ran with no #6. so now you know the story, Any help and guidance will be greatly appreciated TIA!! As a side note I am getting the FSM as we speak!!