BDE Performance VTC Gears
Stock VG30DE(TT) variable Valve Timing Control (VTC) intake sprockets are non-serviceable sealed units that are notorious for leaking oil and making noise. Oil leakage occurs because the rear cover can become loose and rotate independent from the sprocket, this ruins its o-ring and eventually leads to an oil leak.
The noise is typical with aftermarket higher-pressure valve springs that cause the cams to over-rotate on every valve-closing event. This over-rotation causes the VTC piston to screw itself into the VTC helix and overpower the piston return spring. As the cam continues to rotate, the valves close and the valve spring pressure diminishes to the point where the return spring slams the piston back to its stop creating the audible tick that is indicative of a noisy VTC.
By design, the VTC primary function is to advance the intake cams 20 crankshaft degrees from off idle to roughly 5800 RPM to increase torque in this RPM range. At idle and high RPM the VTC is in its static “zero advance” position which reduces overlap for smooth idle characteristics and increased torque at higher RPMs; however, at idle there is sufficient time between valve open and close events to allow the VTC piston to move its full stroke for greatest noise production. At higher RPM the noise may not be as loud due to the other competing high RPM noises, but more than likely the cams are not 100% in control of the intake valve timing and power suffers.
BDE rebuilt VTC sprockets feature a piston return spring specifically engineered to be capable of the load needed to prevent camshaft over-rotation and permit full VTC function with installed valve spring pressures up to 90 lbs. Oil leaks are eliminated by positively locating the rear cover with a dowel pin thereby preventing it from rotating.
$475.00
We have these gears in stock and ready to ship. A $150.00 core charge applies.
We now have 94+ style BDE Performance VTC Gears in stock as well.
When BDE rebuilds late model VTCs, we set the bolts directly on center with the adjustment slot, allowing a full ±10° (crankshaft) of adjustment from either side of zero. Also, BDE relocates the adjuster bolts to the front of the sprockets making them truly user-adjustable when installed. Nissan has also offered this new style VTC as a service replacement with two different versions - one that will fit early (1990 to 1993) camshafts, and one that will fit only late (1994+) model camshafts. BDE has a limited quantity of cores for both versions, and these will only be sold as matched pairs. Please specify the version that you require when ordering. We prefer exchanged cores to be the same version as purchased, under no circumstances will early model VTCs be accepted as cores towards the purchase of late model VTCs.
These are $575.00 with exchange or a $400.00 core deposit.
Click Here For 94+ Style Gears
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BDE Performance VTC Gears In Stock - 
