its back together and works oil pressure is good with the mechanical gauge still installed. I'll keep that connected until I can figure out why the electric gauge is not working. the engine wont stay running but at least now I can figure that one out.
thank you for all your help Wes. John thanks for jumping in at G503 and telling me not to start the engine again until this problem was corrected.
never would have guessed it was the oil jet.
Listen closely to your engine from now on. The .004 oversize on the jet contributed to low oil pressure but shouldn't have left you at zero. My money says you still have excessive clearances at one of the following:
1-Rod bearings
2-Main Bearings
3-Cam journals. Especially the center and rear which have no bearing shells.
4-Lifter bores. (Oversize lifters are available to fix this problem.)
Hi Bill,
I'm in the middle of an engine re-build, and found that mine was .070 also. I discovered that these nozzles (in either .040 or .070) are kind of rare, NOS or otherwise. The few I saw were quite pricey ($20+ or so) for what they are.
So I followed some of the advice in this and other forums and asked the machine shop I used for block work to weld the hole shut and re-drill it to the correct size. No problem. I don't own a welder and neither am I one so the few bucks it cost was worth it to me.
You can check the size of the hole with machinist drill bits.....if I recall correctly, .070 is a size 50 bit and .040 is a size 60 bit.
Thanks Ron. Yes I think I'm going to have to weld mine and redrill. Mine is definitely the .070 one , and although I have oil pressure I just think it should be higher. I saw that AJP has them but it doesn't say which size hole it has, and if you go by their picture it looks as if it's the .070 also. If you look at the picture Wes posted of the 2 oilers side by side the .070 has a slot cut in the end of the oiler where the .040 doesn't.
It is unlikely that you will see any measurable increase in oil pressure at the gauge with the later .040 jet. It simply slows the loss of localized pressure at the #1 rod bearing. If you read the maintenance notes carefully on the replacement of the .070 jet on early engines it only recommends the replacement if and when you must replace a scored or burned #1 rod bearing. Yes I would use a .040 on any rebuild of an older L-134 but I would not expect greater oil pressure on the gage. The normal cause of low oil pressure after the gage accuracy and bearing clearance has be ruled out on high time engines is the wear of the cam bearing journal openings and the lifter bore openings. They offer a single oversize for the lifters but there is no factory help for the worn cam journal openings behind #1 journal. Some folks have successfully adapted Ford small block cam bearings to the aft journals of the L134.
its back together and works oil pressure is good with the mechanical gauge still installed. I'll keep that connected until I can figure out why the electric gauge is not working. the engine wont stay running but at least now I can figure that one out.
