Hey guys, I have a knock coming from my engine that's only apparent when warm. The knock is most audible and very loud with a stethoscope when placed on the VTC solenoid, specifically the brass part, on the tip closest to the fender. I'm guessing the knock is being transmitted up through the oil passageway, probably the ones closest to the brass part.

Does anyone know what component(s) these passageways lead to? Thanks!

2006 Rev-up engine btw.

 

My car is doing the same thing, except the knock occurs when braking or after I have stopped. My engine revs high sounding like its stuck, making a grinding sound then shifts in gear and takes off fast. The dealership replaced my idle relay which was causing it to rev high but had to order an odometer cluster (waiting on that); however the problem is still there. This transmission shop diagnosed my car with an electrical solenoid problem that Nissan says isn't their code number (1807). Hope we can help each other with this.

 

it's probably your cam sprocket. that oil passage goes all over the place. if you trace it, it goes from the oil pump, through the timing covers, up to the front cam bearing block, through the vtc solenoid, back through the cam bearing block, through the timing covers, into the cam sprocket.

it seems the cam sprockets leak internally and produce the knocking noise you are hearing. the internal "pockets" for the oil pressure to fill in during cam timing changes go empty and they slap back to rest where a spring pushes a small plactic button locking it into place. you can take off the front of the cam sprocket cover(4 10mm bolts), and remove the spring seals---they look like little archery bows. you can bend those bows a little bit and the noise might go away for a few miles, but will surely return.

good luck, replacing those sprockets kind of sucks.

 

An inspector recommends to change out the transmission valve body.

Tell me if that works, please.

Call the corporation get a claim number or have them to do a recall on this vehicle. Help all of us with this problem.

I have a question, was the engine built in California? The vin starts out JN1A