Search results

Alright good to know. Just don't want to ventilate a brand new block.

So, would it be alright to idle it long enough to get the engine to at least 120 degrees before loading it for break in? I just don't feel right about putting a load on a cold multifuel.

So the newer pistons are only 1/8" shorter. Should still be plenty of meat left to cut more ring grooves.

If it ever comes down to it, I'll take them and get a couple more ring grooves machined into them.

I don't like them. I don't want less rings in my engine.

That's why I was saying I would have used the new LDT rings. More tension is better, especially since you have less rings anyway with the new pistons. I don't feel like those pistons are right for our engines. I'm thinking they are for another application, but since they fit, the dealers are...

With the difference in ring tension you found, I believe I would have gone back in with a new set of surplus multifuel rings on the new pistons, especially with all the labor time you have in it. That's just my thought on the matter. Ring tension in a high compression engine is certainly...

I sure would like a set of those pistons..

You know Jake, that is an interesting idea. I forgot about that entirely. Seems plausible. And it would explain why some reman engines have a lot of blowby from the slobber tube, and some have almost none. If they weren't properly observed and replaced with properly sized liners during rebuild

I see its shorter too, no skirt legs.

It almost has to be the pistons, or the hone of the liners. Worn out engines have compression on par with those readings. With new heads it couldn't be a bad valve job on every hole, and I don't see valve springs getting weak enough to cause that just from sitting on a shelf for years. If they...

Yes we are, we are just surmising at this point. It really needs to be torn back down to find the problem. A cracked block could cause it, if he were losing water, but that wouldn't explain the low compression across the board.

Maybe those two ring pistons are the old 17:1 fabled pistons? I don't know, just surmising.

Those pistons may be for the LDS 465-2, less rings for higher rpm. These engines always have blowby. I know that doesn't make you feel any better after all that work, but I don't know what else to tell you, unless you want to tear it back down and put your old pistons back in with new rings.

I know an easy way to get the rings to seat without actually running the engine. Works with some engines that have run hot too. Pull the injectors all out, get a quart of dex/ merc ATF and some gasoline or mineral spirits in a small squirter bottle. Squirter some ATF and a little bit of the...

Oil pressure is more affected by condition of cam bearings than crank and rod bearings. Try and find a set of new cam bearings.

That's correct.

Exactly. Installation procedures were slightly modified by adding a retorque to address the issue of head gaskets blowing, even with the newest style gaskets. Just ask Ferroequinologist.

That is for the old, new style headgaskets. Second generation.

You have to get the engine to proper operating temp, then retorque the heads. I don't know what oil you are using, but the greasy sludge in the valve cover is usually paraffin or other impurities from cheap oil, or outside sources. It can also form if you have a habit of running the engine for...