Coolant Leak

[All_Boost16G]

I have just put a new motor in my 1999 Gst eclipse. I've taken off the housing a couple of time, and replaced the O-Rings and have used RTV for the housing. But now when it has not leaked for 2 or 3 days. When i started it today it leaked alittle bit, and i watched it spurt out near the bolt in the block,by the turbo, under the exshust manifold. But I revved it up and it went away. The only thing i thought is that the O-Ring doesn't expand till it get warm and build pressure. Has one had this problem or even the bolt.


Thanks Matt

 

[luv2rallye]

One common source of a water pump leak is the o-ring not installed properly. You must replace the o-ring in the crossover inlet pipe by putting it on the pipe end first, coating with coolant, and then insert pipe with o-ring into water pump. Do not put the o-ring into water pump first as it will not seat properly and will leak.
Also do not use RTV on the water pipe. The o-ring does the job of sealing the water pipe to the pump housing and doesn't need anything else. The RTV will reduce it's ability to seal and flex and can actually create ways for the coolant to leak. Make sure that the water pipe is free of any corrosion where the o-ring sits and that the o-ring is lubed with coolant before putting the pump on so it isn't cut or torn. Take a scotch brite pad (the green kitchen scrubbers) and polish the water pipe end if necessary. Use a new o-ring. Make sure you don't scratch the inside of the water pump.

 

[All_Boost16G]

Thats is the way i installed the o-ring, and i did not use RTV. I also used a grinder with a wire brush and cleaned up all the fittings on the pipe, it has not leaked since, so I have pretty much forgot at it. I just keep checking the coolant levels.

 

[luv2rallye]

Other ideas: http://www.dsmtuners.com/forums/problem-diagnosis/233476-finding-coolant-leaks-tips-tricks.html