UPDATE:
I have been reassembling the engine over the last few weeks, measuring everything as I go - no assumptions that the factory got things right etc.
Interesting fact 1. Crank stampings for journal diameters, mostly wrong. This resulted in extremely tight main clearances.
Interesting...
Yes, both intake and exhaust. Crank hasn't been checked. Please don't ruin my year more than it is already with such talk! hehehe. I'm taking it all pretty well I must say! Having just paid a heap of money to rebuild it, to do it all again. barely anything left that is usable. The machinist...
Thanks Smokey. I didn't think something I left out was important but it now seems it may have been critical to the problem.
I neglected to tell you why the engine was dead. Now I can't say which came first (its a chicken and egg situation - which came first), but the engine was stripped due...
ANOTHER question (what, he wants to know more!)....
ok, as mentioned previously, Nissan bearing clearance specs are 0.0008 to 0.0018in.
I had about .001 to .0015.
If I was to go to .0025in clearance, what negative effects do I have other than loss of oil pressure do to excess oil being...
Had a look at the Clevite site and the alli bearing section. They look fine compared. They have spot wear, but as mentioned by clevite, this is fairly normal. There is no scratching, discolouration etc to be seen.
I don't think lack of oil to the bearing is a problem, more likely the lack of...
Willeng, thankyou.
I am skeptical. The arias take away a fair bit of the pin offset that is there in the factory units. Ie, it was easy to measure the factory offset, nearly impossible to tell the the arias, but there is a tiny bit.
Scuffing is on the middle of the pistons.
OK, can someone...
Thanks everyone.
Not factory forged, correct. The block was bored with a torque plate (alloy block with steel liners), and taken out to the necessary clearance as specified with the pistons.
I cleaned and cleaned the bore knowing of the possibility of problems with this and yes, they were as...
Was using a Valvoline semi syth 10W-40. Since found out it was only a semi too. The engine was putting out 350 hp at the wheels out of 2Litres of capacity, which is basically twice the power output from factory, so it was fairly stressed.
There are many of these outputting much more, so I...
Not being an expert on such things, and self tought, assumptions were made.
The bearings reinstalled after the rebuild were of the same specification as original. Nissan do a numbering coding system on their stuff and we just replaced same with same. Knowing however that we were using...
I recently rebuilt a Nissan SR20 turbo charged engine. Ran fine for around 2000 miles. Pulled it down due to another failure and found thrust face wear on the forged pistons.
We installed some Arias forged pistons and Eagle H-Beam rods. These rods however do not have a thrust face oil...
