2001 ST350 Workhorse Smoke from exhaust

sccowboy · 03-16-2015, 10:25 AM

http://ngksparkplugs.com/tech_suppor...qs/faqread.asp

http://www.onallcylinders.com/2012/1...r-spark-plugs/

Both offer examples of what could cause that. The compression seems to be high as compared to the manual.

toolman090 · 03-16-2015, 05:59 PM

If that oil was overfull check the air cleaner and make sure it is not soaked with oil

warfare · 03-21-2015, 05:50 PM

Replaced plugs, air filter, oil, fuel, fuel filter and oil filter. Could the valves need adjusting? The passenger side plug is black and wet but the Drivers side is just black. Could the carb need rebuilding / cleaning?

sccowboy · 03-21-2015, 06:46 PM

Adjusting the valves is never a bad idea, neitheriis a good carb cleaning.

sccowboy · 03-21-2015, 06:48 PM

Your compressionseems to be good, you could try pouring an ounce or so of 30 wt oil into the Cylinders and seeing what the compression does. If it comes up then the rings are worn, if it stays the same then possibly valve seals. Really the only 2 ways oil could be getting into the Cylinders would be rings or valve seals.

warfare · 03-29-2015, 09:16 PM

I have the valve guide seals. Does anyone know of a procedure that does not require removing the head?

sccowboy · 03-29-2015, 11:36 PM

Hmmm. I can't say that I do. It's really not that difficult to pull the engine and head. Plus you could RE lap the the valves while you have it apart. Idk bud. If I was going to do that, why not just knock out the rebuild.

Beaner913 · 03-31-2015, 09:45 AM

Quote:

Originally Posted by warfare

I have the valve guide seals. Does anyone know of a procedure that does not require removing the head?

Use compressed air to hold the valves closed. Using your compression tester you can remove the gauge and hook compressed air from a tank or air compressor to the end of the hose that is threaded in to the spark plug hole. The air pressure in the cylinder will hold the valves in place while the springs are removed.

sccowboy · 03-31-2015, 11:37 AM

I totally forgot about that trick. That should work nicely.

warfare · 04-04-2015, 08:34 PM

I was able to replace the valve guide seals today without removing the head and it cured the oil burning problem. It was a bit of a challenge but I got it done and no more smoky and wet exhaust. Thank you for the guidance on this issue. Now I only have $300 into this cart and it's working. WooHoo!!

03-16-2015, 10:25 AM	#11
sccowboy It ain't gonna be easy. Join Date: Apr 2008 Location: St. George, SC Posts: 1,480	Re: 2001 ST350 Workhorse Smoke from exhaust http://ngksparkplugs.com/tech_suppor...qs/faqread.asp http://www.onallcylinders.com/2012/1...r-spark-plugs/ Both offer examples of what could cause that. The compression seems to be high as compared to the manual.

03-16-2015, 05:59 PM	#12
toolman090 Not Yet Wild Join Date: Apr 2013 Posts: 7	Re: 2001 ST350 Workhorse Smoke from exhaust If that oil was overfull check the air cleaner and make sure it is not soaked with oil
toolman090 Not Yet Wild Join Date: Apr 2013 Posts: 7

03-21-2015, 05:50 PM	#13
warfare Not Yet Wild Join Date: Mar 2015 Posts: 7	Re: 2001 ST350 Workhorse Smoke from exhaust Replaced plugs, air filter, oil, fuel, fuel filter and oil filter. Could the valves need adjusting? The passenger side plug is black and wet but the Drivers side is just black. Could the carb need rebuilding / cleaning?
warfare Not Yet Wild Join Date: Mar 2015 Posts: 7

03-21-2015, 06:46 PM	#14
sccowboy It ain't gonna be easy. Join Date: Apr 2008 Location: St. George, SC Posts: 1,480	Re: 2001 ST350 Workhorse Smoke from exhaust Adjusting the valves is never a bad idea, neitheriis a good carb cleaning.

03-21-2015, 06:48 PM	#15
sccowboy It ain't gonna be easy. Join Date: Apr 2008 Location: St. George, SC Posts: 1,480	Re: 2001 ST350 Workhorse Smoke from exhaust Your compressionseems to be good, you could try pouring an ounce or so of 30 wt oil into the Cylinders and seeing what the compression does. If it comes up then the rings are worn, if it stays the same then possibly valve seals. Really the only 2 ways oil could be getting into the Cylinders would be rings or valve seals.

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03-29-2015, 09:16 PM	#16
warfare Not Yet Wild Join Date: Mar 2015 Posts: 7	Re: 2001 ST350 Workhorse Smoke from exhaust I have the valve guide seals. Does anyone know of a procedure that does not require removing the head?
warfare Not Yet Wild Join Date: Mar 2015 Posts: 7

03-29-2015, 11:36 PM	#17
sccowboy It ain't gonna be easy. Join Date: Apr 2008 Location: St. George, SC Posts: 1,480	Re: 2001 ST350 Workhorse Smoke from exhaust Hmmm. I can't say that I do. It's really not that difficult to pull the engine and head. Plus you could RE lap the the valves while you have it apart. Idk bud. If I was going to do that, why not just knock out the rebuild.

03-31-2015, 11:37 AM	#19
sccowboy It ain't gonna be easy. Join Date: Apr 2008 Location: St. George, SC Posts: 1,480	Re: 2001 ST350 Workhorse Smoke from exhaust I totally forgot about that trick. That should work nicely.

04-04-2015, 08:34 PM	#20
warfare Not Yet Wild Join Date: Mar 2015 Posts: 7	Re: 2001 ST350 Workhorse Smoke from exhaust I was able to replace the valve guide seals today without removing the head and it cured the oil burning problem. It was a bit of a challenge but I got it done and no more smoky and wet exhaust. Thank you for the guidance on this issue. Now I only have $300 into this cart and it's working. WooHoo!!
warfare Not Yet Wild Join Date: Mar 2015 Posts: 7

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