On the motorway!
Join Date: Jan 2007
Location: Farnborough Hampshire
I know of one D22 that had a noise just like yours, the owner got sick to death of taking back time and again to Nissan Aldershot, who changed the belts, adjusted the tappets and finally they even changed the camshafts.
He part-ex'd it for a D40 with them, the car then got cleared out in the trade to a mate of mine who bought it.
He changed and tried all sorts to get rid of the noise, right from the start I suggested he drop the sump and look at the big ends, but having many years spanner experience he was convinced that because it didn't sound like big end wear, it couldn't be this.
Eventually after much wasted time, frustration and head scratching he had nothing left to try or to loose and dropped the sump.
What did he find??
No. 3 big end completely b******d, worn right out, so far in fact that he had to have the crank ground to remove the scratches on it and go oversized.
I am not saying this is your problem, just giving you the benefit of past experiences.
I am sure many owners on this site will agree, that when the ends do go on the YD25 engine, they do NOT knock, but tend to give a tinkle/rattle just like a top end problem.
If you are going to strip parts of it down for this noise and intend to keep the car, you may as well do the ends, bolts and 'O' ring anyway?
Good luck, let us know what you find,
Very first upgraded D22 - 9 years and 70K miles and still going strong!