I am looking at getting an ol beater pickup, the truck is a 1969 ford 100, has a straight six think its a 289. But I am pretty sure I can get it for about 200 bucks, motor runs fine other then that. What do you think would cause this? And do you think it would be worth getting this or think the motor is at its last leg?
Bad gasket on the oil filler cap? Too much oil in the engine?
Not having the cap on lol
Rob
Sold 2/2/05
Bad oil control rings, or it's pressurizing the crankcase & the PCV system is shot.
well I was gonna say on newer cars te oil covered cam is spinning right under the cap, alot of cars have internal paffels in the valve cover to keep the oil thats flinging off the cam form shooting out when the cap is off.
and its a 240 motor not a 289 my bad, but the piston rings is what I was afraid of what it could be, which aint a simple fix if I aint mistaken, cause that would be a full rebuild basically.
The old Ford straight 6 is a very durable engine.
They have a solid reputation as being very hard to kill, even with major things wrong with them.
The I-6 is actually a desired engine for 4x4's and tow rigs, due to it's high torque output and longevity.
In other words, if it runs at all, it's worth more than $200 just for the engine.
I seriously doubt the problem you're seeing is due to piston rings. There's just no direct correlation between the oil on the top end and the piston rings.
As suggested, certainly try a new oil filler cap first.
My next guess would be a plugged oil passage on the top end.
Could be a malfunctioning oil pump, but those tend to reduce pressure when they fail, not increase it.
You should put a mechanical oil pressure gauge on it to see what it reads.
A compression test would also be good info to have.
Again, though, if it runs, it's worth more than 200, so if nothing else, buy it and resell it for a quick profit.
You may want to post your question on "Inline 6" forum at
Ford Truck Enthusiasts, they have some very smart folks there that could possibly give you a diagnosis.
-Ferrite
If it coming out the cap, then it's either blow by from the rings, or the PCV system is trashed. Nothing else will pressurize the crankcase to cause that kind of action.
If the rings are shot (blow-by) won't the exhaust have black/blue smoke from oil coming from the tail pipe? The motor will also run like crap. I had a straight 6 amc motor do that.
I'd snatch it up for that price even if you had to replace the motor. Drop a 300 straight 6 in it or upgrade to a v8
Not always. It doesn't take much to pressurize the crankcase.
If it was my truck, I'd be digging into the PCV (crank vent) system.
Edited 1 time(s). Last edited Monday, November 06, 2006 1:00 AM
