Belgian1979 wrote:I have been trying to find out what the best way is about this. There seems to be a lot of opinions on this subject.
My previous engine scuffed the pistons during startup and I want to make sure this doesn't happen again.
Untill now there are people that say that you only lightly need to oil the pistons, walls and rings. Probably to have the seat fast. On the other hand reading D. Vizards book about rebuilding SBC, it says to really dip the piston in oil.
So what's the concensus here ?
PWMAX wrote:To add, a lot of the scuffing on the 1st start up, is usualy a case of not having the block filled with coolant. Make sure to circulate coolant thru the engine before start up. Just as important as priming the oil pump
Strange Magic wrote:Scuffing a piston on start up?
Are you actually tearing teh engine back down after the first few minutes to come to this conclusion? You would have to, to make a bold statement as such.
Do not mis-interpet a piston to wall clearance being to tight with scuffing a piston on start up. When you actually think about that staement, it's kind of rediculous. The piston manufactures recommended clearances are usually to tight and without the proper block prep and the correct piston to wall clearance, you will score and tear at the skirts.
Keith Morganstein wrote:
Yes, lots of opinions and recipes. A few drops of oil on the rings and skirts is enough lube.
Most scuff / damage on start-up is because of dirt. Everything needs to be very clean.