Srx burning coolant

J

Jonpost

New member
Joined
Feb 11, 2014
Messages
21
Location
Beamsville
This past summer I bought my 2002 srx 700. When I bought it the heads were missing the blue paint so I took the heads off to get them painted. While I had the heads off I noticed that one piston was not factory, so I took the jugs off and changed the base gasket, the one none factory piston and installed new rings on all three pistons, I also changed head gaskets and torqued it all to spec. The sled ran flawlessly for about 1400 km and then all of a sudden it started to burn coolant very badly. But I noticed before it ran out of coolant (so no piston damage). When I had the engine apart I noticed a small nick in the pto cylinder between the inside o-ring and the cylinder wall, but I did not think much of it because the sled ran great before I took it apart. It was about 2 weeks ago that I took it apart and found the head gasket was broken at the small nick in the cylinder on the pto side. So I bought a new used cylinder and new head and base gasket. I reassembled the engine and torqued it all to spec the sled runs great but still looks to be burning coolant. I thought maybe that it was just burning the coolant that was still in the bottom end, but after running the sled hard for about 15 min it is still burning coolant. When the sled is running It has a small cloud of smoke coming from the exhaust and when I shut it down and started it back up after about 2 min there was a large cloud of white smoke. I put a pressure tester on the coolant bootle and pumped it up to 11 psi and after about 12 hours it had dropped to 10 psi but stayed at 10 for the next 6 hours. Is it at all possible that it is still burning coolant that is in the bottom end. Or is it possible that the new used cylinder I bought has a crack in it? The coolant level is not really dropping noticeably in the 15 min it has been running. I also should mention that after running for about 10 min there is not a lot of pressure in the coolant bottle.
 

Is it possible that the exhaust can hold coolant and it is still burning off???? And that the sled just needs to be run for a period of time to clean it out.
 
after you have ran the engine and its good and warm remove the spark plugs and look down in the plug hole are the pistons wet and shiny? is the sparkplug wet and shiny looking in any of the cylinders?
 
Plugs come out all looking the same kind of a golden brown ting to them the pto piston looks a bit wet and shinny the mag and centre are dry
 
I would take it out and ride it a bit get it good and warm and then recheck the pto one, its possible it has antifreeze inside the pipe yet and the reversion pulse from the pipe is still bringing it back into the cylinder but it should burn out with a good running at wot for a little bit, if it still has wetness to it on the piston top and plug then you have a leak into that cylinder from somewhere.

I would also swap that spark plug with one of the dry ones before you go ride this, will help to read the plug.
 
i ran the sled hard last night and after about 25 min of hard running the exhaust finally started to clear and after 40 min it was all clear like normal. When i get home from work this evening i will check the coolant level, spark plugs and tops of the pisotns.
 
I pulled the plugs this evening and all plugs are dry and have the same brown ting to them. I did put the mag plug in the pto side and pto plug in the mag side like u said. The pto piston looks like it has a very thin layer if wax on it and the other 2 have a small amount of carbon on them or something black on the tops but they look pretty normal. The coolant level stayed the same.
 
You must log in or register to reply here.


Back
Top