Originally Posted By: volvomix
I used Bar's stop leak for an dodge dynasty gasket leak. It immediately plugged up the heater core. I freaked out, but got it to a shop who immediately back flushed it and freed it out.
We drained all that stuff out of there and put anti freeze back in.
Now I didn't use pellets I think the color of the bottle was silver for some reason. That was two years ago. I may have a head gasket leak on the Volvo but hesitate to use a stop leak on it.
Yeah, stay away from the bottled stuff. The pellets are a totally different product, and correct me if I'm wrong, cparksjr, but I believe the GM pellets are made by Bar's Leak, which they put in every engine that came off the line for years.