eshack93

I understand that cost benefit. My thoughts were “well it may save money in the long run” but dumping 10 grand into a transmission swap isn’t really a practical solution either. Thanks for the input I’m gonna keep digging

Question for you fellas, I’ve got an tandem dump r model with a 283 Mack and a two stick 6 speed with 4.17 rears. The ol 6 speed is gonna be due some repair pretty quickly and I’m really considering pulling it and putting an 8LL in it. Be nice to have a couple more gears to traverse these hills where I’m at. My question is does anybody have the numbers or can point me in the right direction for the bell housing, clutch and driveshaft I’ll need? I’m assuming all those things would have to change. Thanks in advance

Okay fellas. Sorry it took so long. Cleaned the pump up and put it back on, filled with oil etc. drove it down the road and it’s got 80 psi at 2,000 now and 32 at idle. Can too much press hurt? Or is it just high cause of the fresh rebuild?

I’d love to see one. Want to make sure this pump is missing something or broken before I would order a new one ya know? Thanks for all yalls help!

Checked the pump for scratches it’s all pretty clean the teeth all look to be in good shape. I polished the pressure valve with 1500 grit sandpaper and got it baby smooth. My oil pan is 9 inches in the deep part of it towards the bell housing.

I’ve got a 79 rs686 with the 283. It has 3 oil filters. How would I tell if it has the oversized pan or not?

This trucks a 79. It’s always held about 9 gallons which is what it’s got in it. It’s full on the dipstick which hasn’t been changed or anything. What’s the proper oil amount for a 283 e6?

And what about this brass bushing inside this gear? Is it supposed to be one long piece? I’ve got one small piece and one big piece

Would the surface rust on this pressure valve on the oil pump itself be a problem? I also pulled some bearing particles out of those small holes. I’m not super confident in my knowledge of how this oil pump works and what this pressure valve thing is for

Well I double checked the gasket at that base of the filter housing and it’s definitely got the correct gasket. I was sorta hoping that was the problem. Gonna drop the pan again and double check the oil pump. Make sure nothings missing or out of whack on that. However I did notice when I pulled my oil filters off that they were only about 3/4 full. What would cause that?

Just looked through my service records. I replaced oil stand gasket approx 1000 miles before overhaul happened. Didn’t notice a drop in oil pressure after that gasket was replaced though. Coincidence? Or do you think they’re related?

I did the oil filter stand off but that was probably 10,000 miles before the rebuild. Didn’t have any oil pressure problems at the time but the number two rod bearing spun. Which caused the rebuild. Ordered the gasket for that oil filter stand off the vin and it only appeared to fit one way. What are the odds those two things are related?

Yessir I made sure to jack the crank up and did one bearing at a time. It’s all within spec. That’s why I’m Kindof having a mind explosion. I’ll check on that oil pump and get back with you. Maybe when I changed a gasket something fell out of place. Thanks!

Yeah I get that. I’ve worked on a lot of stuff but this trucks been a headache since day one. I was hoping the inframe would solve a lot of that. I tightened up a lot of oil leaks, air compressor, power steering, remachined heads, new valves, pistons, liners, all bearings, crank, clutch, radiator. Only thing I didn’t change was cam and oil pump. But yet I’ve got low oil pressure and I’m banging my head against the wall. Only thing I can think is that oil pump was on its way out. That pump is not timed is it? It’s driven off the air compressor gear which was not timed.

Joey I read through this post and went through a lot of the trouble shooting Mike did. I have checked the pressure valve on the oil filter housing and did not see an issue with it at all. The spring had a lot of pressure on it. Cleaned it put it back together. I changed the crankshaft when I did my inframe so the oil pump was off, the rebuild kit came with some o-rings and gaskets for the oil pump so I changed them. What are the odds something didn’t go back together correctly on that pump? I mean it was relatively simple just a couple bolts. But I definitely do not have the correct oil pressure now