leaker

[NJT 5573]

My 92 started dribbling oil off the block at the rear of the drivers side head last trip. Runs down the grove where the head bolts to the block. The PS pump looks tight, the blower base looks dry, maybe damp at the back on the sides more to the drivers side, but no telltale stream like I have off the block/head area.

The compressor mounts behind the leak. Can't see the flange areas at the rear plate. The inspection cover inside this bus is real small, and the other side is just as bad. About all I can do is start pulling parts and throwing wrenches untill I get to the problem. I hate to chase a small oil leak, because I know as soon as I repair it something major will make me tear it down again right away. What is the odds favorite for the cause, I don't do enough 2 stroke work to know the little stuff especially when I can't see the area. Must be a pressure leak, how bad will it get? Cross over pipe looks dry.

Everything I can see looks dry, so where is this leak hiding?

[luvrbus]

Larry, check the blower oil supply line 1/4 inch line about 2 inches long goes from the blower to the block on the back at the top of the blower.       Good luck

[Hartley]

Also check the clamps on the rubber sleeve that covers the blower drive.
Minor leaks in that location can be indicated in the place you said and the
oil will run down the back of the V and across the back of the engine.

Usually happens when under load and just leaves a wet area. Air + Oil under pressure is the magic part.

Just to verify, You are running 40 wt Oil? Anything less or diluted oil will tend to creep out of the oddest places and darned hard to find.

Dave....

[tomhamrick]

I chased the same leak for a long time and finally found that there is a short rubber hose connection in the middle of the cross over pipe that, If I remember correctly,  is sort of hidden and hard to get to. The hose clamps on mine were loose and after tightening them, no more leaks!!

Tom Hamrick
1984 Eagle 10S

[Busted Knuckle]

Clifford & Dr. Dave have NAILED the 1st 2 areas I have had problems with!

As a matter of fact I've had numerous experiences with the line Clifford mentions!
We even came up with a "hoakie way" of fixing one once when there was no way to get said line from DD on Holiday week-end and the bus was from NY.
The owner did not trust his driver to "keep an eye on it", probably since the only reason the driver knew there was a problem was the bus kept dying. And when we arrived on the service call it took 4 gallons of oil to bring it back to the "safe zone", not full that would've been another gallon. (Which I didn't have with me!)
And of course he needed it fixed NOW as the bus was leaving for NY that afternoon. So he asked "isn't there anyway you can patch it to make home so our mechanic can fix it right"

I talked to the owner a couple months ago about a different issue (6 yrs later) and asked him "Hey what did your mechanic think of our Hoakie fix on that blower oil supply line, when he fixed it?"
I about fell over when he said "Well to be honest our mechanic didn't fix it because he said what ya'll did was good as new! As a matter of fact when we sold that bus 3 months ago it was still like that!"

I really shouldn't tell how we "Hoakied it" for fear that someone will use it to short cut the correct fix and not replace the line with the proper one.
 BK  

[Hartley]

Oh.. And by the way..

The two rubber hose tubes that run from the cylinder head to the governor housing can also leak.

The biggest problem here is that to replace any of those hoses, You have to take stuff off the engine...

( Blower Drive Hose ) Remove blower and separate the blower drive assembly.

( Throttle Rod Hoses ) You have to remove the valve covers and governor housing to get the rods out to change the hoses.

One word of warning.. If by any chance you get dirt in the blower drive assembly it could result in breakage of the drive and blower. I had one do that and grind and engine to junk in about 60 seconds. The oil line must always be checked also.

Also check the turbo flange for leaks or oil puddling at the top of the blower case.
That might indicate a failing turbo seal or bearing.

[RJ]

I really shouldn't tell how we "Hoakied it" for fear that someone will use it to short cut the correct fix and not replace the line with the proper one.

BK -

Dunno what you did, but if you were from the northern part of the US, would your fix be considered "yanquee engineering?"