Ok, I believe i have rod knock and these are the options I've thought of.

1) Rebuild my engine.

2) Swap another VQ35DE in.

3) Swap A VQ35HR

4) Swap out my bottom end and and use my current heads. Question is has the heads been ****ed up and how could i tell.. Also what other bottom ends/short blocks mate with these heads. VQ37,VQ40 ?? IDK

If anyone has anything other options I can go with or any info related to one of the options I have listed I would greatly appreciate it !




Thanks!

 

This is along the lines of what I would do if I was positive me engine had Rod Knock.

Parts are worn/damaged so the engine will need to be pulled to replace those parts.

If you are going to tear down the engine and try to rebuild there is more to be done then just replace the parts and put it back together. You want to know what caused this to occur. Most of the time on bad worn out bearings it is lack of oil supply/pressure to cool/lubricate each component. Also having the engine exposed to repeated detonation can cause issues too.

There are many things that can cause low oil pressure. Worn out main and rod bearings and also crankshaft journals. Also camshaft journals and cam bearings with excessive clearances will decrease oil pressure. Oil pressure is created not really from the oil pump. The oil pump provides the flow of the oil, and resistance on that flow produces the oil pressure. The channels that the oil flows through and clearances of the bearings and journals determines the oil pressure. As things wear the clearances increase which does not put as much resistance on the oil system meaning lower oil pressure. Also check for any restrictions and/or clogs in the oil system.

Moving on, after determining what caused the excessive wear on the bearings you can then move on the fixing everything that needs to be fixed.

This involves a bit of work and sometimes is easier to just replace the entire engine instead of rebuilding it.

 

^ Agreed 110%.

Find out WHAT caused it first if you do plan on rebuilding it. Are you low on oil? If not then I would look for another engine and just replace it. There are tons of these engines out there so I'm sure you can find a low mileage engine for around a grand give or take. My sister had the same problem with hers (2003) to only find out she was very low on oil and the noise went away when she added more oil. In the mean time we looked for another engine and came across one with 5k miles for $2200 in NJ. She ended up trading the car for a newer one anyways. Again, that's just my opinion, swap out the engine and have piece of mind.

 

budget dictates all.