Offroad-Express

just got another 4d56-t as mines abit dodgy, just wondering if anyone recommends while i have it out should i flush it somehow drop the sump and clean it down with diesel ? thought i should check first before i do anything silly or not worth while... also whats a good engine flush product? ive heard people using diesel ? also heard the horrid story's of people using engine flush and lossens up junk and throws it on a big end any input would be great, thanks

I use atf every couple of oil changes. I just drain out half a liter of oil then top it up with atf and let the engine idle for a couple of minutes then drain it, works perfectly and is cheap. The engine flushes in a can are very good at cleaning the built up crap in engines, but they can clean to much by removing the carbon build up that helps seal the engine.

if its not broke dont fix it

yeah might just do that, leave it be good idea