leak

[Soundguy]

</font><font color="blue" class="small">( compression test. now forgive my ignorance but i'm pretty new to this and i'm learning as i go but how would i go about doing this. )</font>

On a gas job you slap the plug in a sparky hole and let'er puff generally till the gauge quits rising.. gas off, and throttle wide open ( air). then do it wet.. both on a warmed engine.

On a diesel.. guess what.. you get to use an injector port. Old tractor gas engine might blow up to 150-170 max... diesel gonna be in the 400's or so... check yer spec sheet..

Soundguy

 

[normde2001]

"somewhere i saw some one mention doing a compression test. now forgive my ignorance but i'm pretty new to this and i'm learning as i go but how would i go about doing this."

Guys are always talking about doing a compression test on a diesel as if there were nothing to it. Fact is, it is not very feasible for the average homeowner/shadetree mechanic. I have never seen a diesel compression tester, wouldn't know where to find one, and certainly would not buy one.

 

[CO_Farmer]

White smoke is "cold" unburned fuel and is usually normal for any kind of diesel, especially when the outside air is cold and damp, the engine isn't particularly warm and at low RPMs. White smoke doesn't have anything to do with blowby.

 

[Gizmo36]

On a lot of old diesel Tractor some people would pant the exhaust black so they could trade then and you can not see the oil. When you start a diesel and run it for about 30m to and hour and oil start to come out of the exhaust that is bad rings in the motor if you are not lugging it. That is what a Used tractor man toll me. is he right Hoye.

 

[HGM]

Norm,
While I do agree that its not as easy as a gas burner, if a guy was to do is own diesel work, he should be able to do the compression test. On the other hand, if this is a one time deal, maybe he can rent one from a dealer or rental store? Just a thought. The engine side fitting will probably be unique and need to be purchased though. I just dont like the idea of tearing an engine apart without knowing why /forums/images/graemlins/grin.gif..

 

[todda323]

I think you guys may be right about the white smoke. I read that if there is blow by that is an indicator of compression loss past the rings and may be an indicator of bad rings...at least thats what i read...and thats why i ask allot of questions. By the way you guys are great and i greatly appreciate everyone's help and suggestions. I have traced the leak and it is definatley coming from the under side of the manifold. it has a very oily texture to it an appeares identical to the case oil. like i said no smell of diesal. I thought it may have been a line but it is leaking from the manifold and weeping down the line. I keep it garraged and there shouldn't be any h2o left in the pipe from sitting outside. it started raining again so it may be a while befor i can get her out of the girrage as the rice tires tear up the yard pretty bad