Thread: F100 - Question for Rojo

It's very hard to second guess the "Quality" of the build. Obviously it was not rebuilt, maybe not even re-ringed. The bearing issue is the best example of very low grade work in any case. Now the rings will need to be removed off the pistons to make sure no contaminants still remain. Simply blowing the rings out you can't "know" all the trash is out. "Knowing" every aspect of the assembly process is how we warrant our work. The rings must go back on the same piston and in the same groves. If you do take the rings off place them 1/2 way down in the bore, use a piston to "square" the ring with the cylinder walls and check the gap, of Every Ring. If you find any tight rings they should be ground to the proper clearances too. The pistons must go back in the same hole, also they are usually oriented in a particular direction so pay close attention to that or you will have a severe case of "Skirt Slap" if not a complete binding of the rotating assembly. Plastigage the bearings, pressure wash the block super well, I noticed no Anerobic Sealant in the block halves, if that is required I suggest using it instead of the RTV that was used to begin with. Use a Torque wrench to reassemble. The oil pump almost has to have damage I wouldn't think of reusing it. Finally one cylinder had low compression that I have not seen a "Why" posted yet. That must be fixed. My Bud.

Excellent. I assume by your response you don't think I'm completely crazy! lol

Great advice. I will follow it to the letter, and roll the dice on using the old parts. This will be fun.

Oh, yes, the low compression was due to "visible" head gasket failure, and air being blown into neighboring piston during leak down test. Actually looked bad between #2 cyl and #1, and maybe even between #2 and #3. I'll see if I can find a pic.

Here's the head removal video. And to answer the question I posed in the video, the head gaskets do come in two pieces. Well one piece, but two pressed together into one. They seem to come off as two.

Yes I remember now. I'm trying to get enough done today to slip off and catch a few more crappie this afternoon guilt free. I'm starting to think there was a problem with the oiling to start with and the engine was split to repair that but they just changed the bearings and put it back together. We will never really know though, just guessing. It does make me more concerned about the oil pump not less. I always have so many projects going at once taking time to do one over just can't happen here.

You mentioned oil pump, so what do I do, jump! Yep, that's one thing I've not looked at yet. Looking at the following video, I'll be ordering a new one. I'll take this one apart though just to see with my own peepers.



Take a look at that. Gotta wonder where those metal pieces came from.

Wow, that’s a lot of metal!

Some of the metal could be left over from whatever the engine went through before this build.

Originally Posted by DockShootinJack

Some of the metal could be left over from whatever the engine went through before this build.

Exactly what I was thinking. The previous job obviously was very flawed, who knows when that metal hit the pan.