Ural Discussion Group
Tech Tips
Topic: Oil cooler (1 of 7), Read 320 times Conf: Owners Section From: Corbin Anderson () Date: Sunday, April 19, 1998 01:33 PM Has anyone seen a oil cooler that might fit a Ural ?
Topic: Oil cooler (2 of 7), Read 167 times Conf: Owners Section From: David O. Smith ( ) Date: Sunday, June 14, 1998 03:58 AM Mr. Anderson, I'm not a Ural owner,YET, so I don't know its' front if the engine lay out all that well. I've gotten the impression that the internal oil filter lies between the base of the two exhaust, or close enaugh to this location that one of the bases of the manifold must be dismounted to uncover the internal oil filter to replace its element. I wounder "IF" a cast metal tube with seperate in-out channels, of sufficant strength, could be made long enough to end an the bottom end of a oil cooler-radiator that could be mounted at the lower front end of the frame,in front of the engine and prominantly in the wind slip-stream during forard motion, "AND" this tube would have room near its mid point,on its' underside for a mounting for a small motorcycle sized spin on oil filter with an anti-drainback valve on the input oil channel(maybe even a Beemer filter???. Eeyuhh, thats a lot of "ifs" but IF it should work out a couple of dirty lil' birds would be knocked off with one stone. Let me know what you think Sir, and any factory techs. that might read this. much obliged, Dave Smith.
Topic: Oil cooler (3 of 7), Read 169 times Conf: Owners Section From: David O. Smith ( ) Date: Sunday, June 14, 1998 03:58 AM Mr. Anderson, I'm not a Ural owner,YET, so I don't know its' front if the engine lay out all that well. I've gotten the impression that the internal oil filter lies between the base of the two exhaust, or close enaugh to this location that one of the bases of the manifold must be dismounted to uncover the internal oil filter to replace its element. I wounder "IF" a cast metal tube with seperate in-out channels, of sufficant strength, could be made long enough to end an the bottom end of a oil cooler-radiator that could be mounted at the lower front end of the frame,in front of the engine and prominantly in the wind slip-stream during forard motion, "AND" this tube would have room near its mid point,on its' underside for a mounting for a small motorcycle sized spin on oil filter with an anti-drainback valve on the input oil channel(maybe even a Beemer filter???. Eeyuhh, thats a lot of "ifs" but IF it should work out a couple of dirty lil' birds would be knocked off with one stone. Let me know what you think Sir, and any factory techs. that might read this. much obliged, Dave Smith.
Topic: Oil cooler (4 of 7), Read 182 times Conf: Owners Section From: URAL Tech Dep't ( ) Date: Sunday, June 14, 1998 05:13 AM Dear Mr. Smith-
Your are on the right train of thought on the oil cooler thing. There are a few unforseen items, (oil pump capacity, cumulative pressure drop of the "new" system, heat rejection rate) which have to be considered also, but the thought process is a fine one.
In the meantime, additional cooling can be obtained by adding a half quart of oil during the summer months. As the motor is part splash lubed/cooled, the additional half quart will help!
URAL Tech Dep't
Topic: Oil cooler (5 of 7), Read 191 times Conf: Owners Section From: Martin Manning ( ) Date: Sunday, June 14, 1998 09:20 AM This message is for the URAL technical department,
I'm confused, it's okay to overfill the crankcase with half a quart of oil? Cool!
Jeff
Las Vegas
Topic: Oil cooler (6 of 7), Read 193 times Conf: Owners Section From: URAL Tech Dep't ( ) Date: Sunday, June 14, 1998 06:30 PM Dear Jeff-
Unlike today's modern engines, the URAL relies on its crank taking an occasional "dip" into the oil for both cooling and lubrication. Called splash lubrication, this method was used regularly in the US through the Mid Fifties.
Splash lubrication will tolerate higher levels of oil. This means more splashing..more oil for lubrication...more cooling. the downside is less power at higher RPMS due to viscous losses as the crank passes through the oil. but this is a small price to pay for keeping the engine together during the hot summer months.
Keep that "old style" motor cool,
URAL Tech Dep't
Topic: Oil cooler (7 of 7), Read 198 times Conf: Owners Section From: Alex & Larry Botheras ( Date: Monday, June 15, 1998 12:50 AM Not only the 1950's... Those gurus of Hi-tech, messrs Honda had splash lube on the push rod C50 in the 60's. And as oil is meant to foam over 6000 rpm, and the engine revved to 9500, perhaps thats why I kept on blowing small ends... The joys of learning as a 16 yr old...