bredstein
TYF Newbie
Hello! My '98 Tahoe with a 5.7 engine had a P0305 code with a SES light. After eliminating any possible ignition problems, I realized that it was a bad injector. The plan was to get rid of the old poppets and install a new MFI setup. At the same time I was loosing a good amount of coolant from a leaking manifold gasket, so I decided to do two things at once. My question to those who have done this job is about the valley: what is the best way to clean it? Where do the holes at the bottom lead? That said, if I wash everything around with a paint thinner or a brake cleaner, will it drain through the oil plug? Here are a few pictures. This black nasty stuff is quite impressive!