VG30E Timing Belt Replacement Guide and Questions

[jp2code]

Originally Posted by Vwsnoopy

Is there a preferred kit with all the needed pieces for this job? I have a 93 SE and am getting ready to tackle this job

Pick one of these premium kits

https://www.rockauto.com/en/catalog/...onent+kit,5759

I found this one and it looks good https://www.timingbeltkit.com/produc...r-1990-to-1993

[cadillacdude1975]

I used a dayco kit. They have been making timing belt components for a very long time.

[strayedcat]

95 D21 Pickup SE 4x4 3.0 V6 VG30E Help Please! New here and to Nissan.
I have done the timing belt (Gates kit TCK249 w/water pump ) and new Gates hoses and many other parts. The parts replaced were all Nissan originals and in surprisingly good condition.
Everything was lined up correctly… Belt arrow to front, both cam sprockets punches on back cover marks and zip tied with 40 teeth b'twn cam & belt lines. #1@ TDC, crank key @11 o'clock, rotor on @#1 position. Crank gear punch @ 5 o'clock & 43 teeth b'twn driver side cam & crank punch marks. (No notch or any alignment mark present on engine). Everything set, adjusted tension pulley 70 degrees with hex key. Rotated crank a few times checking/adjusting belt tension. (No tension gauge here).
I have rotated the crank so many times and noticed the lines on the belt and cams/crank punches are not aligning? How man revolutions until they sync up again?? Maybe never? Anybody Know?

[cadillacdude1975]

As long as the 3 timing marks stayed aligned after two complete crankshaft rotations, do not worry about it. I am sure the belt marks will realign at some point, but they are for installation assistance.

[alabama_lowlife]

Like Caddy said, their purpose is to aid in installation. They’ll line up again eventually but it’s not necessary for you to reassemble the truck.

[jp2code]

How do I find "TDC on the compression stroke" after the timing belt is off and everything is already moved around?

If I just move the crankshaft using the bolt and the camshaft sprockets separately by hand, what are the odds of me hitting a valve on a piston?

For those of you who do not follow What have you done to your D21 Today, my harmonic balancer came apart while doing the timing belt job on a 2000 VG33e yesterday >>here<<. During the struggle to remove the harmonic balancer, all 3 parts shifted around.

[alabama_lowlife]

I would install the timing belt temporarily to move the engine around.

[D21son]

Hello all newbie here. I was hoping someone might be able to help me. I have a 1988 NIssan d21 VG30 that was gifted to my son. I decided to change the timing belt, one problem I did hace was the passenger side cam pulley rotated to the two oclock position. I put it back in the original position, after reinstalling the timingbelt the engine will give a backfire through the throttle body upon full acceleration. I have tore this thing back down 3 times lined up all marks, did the TDC thing and same thing. It runs and idles fine no miss only when I give it a quick full acceleration does it backfire. On my year there is no way to adjust timing. In advance thanks for the help.

[jp2code]

Originally Posted by D21son

Hello all newbie here. I was hoping someone might be able to help me. I have a 1988 NIssan d21 VG30 that was gifted to my son. I decided to change the timing belt, one problem I did hace was the passenger side cam pulley rotated to the two oclock position. I put it back in the original position, after reinstalling the timingbelt the engine will give a backfire through the throttle body upon full acceleration. I have tore this thing back down 3 times lined up all marks, did the TDC thing and same thing. It runs and idles fine no miss only when I give it a quick full acceleration does it backfire. On my year there is no way to adjust timing. In advance thanks for the help.

Did you count the belt teeth between the marks on the pulleys?

The belt only goes on one way. There are 40 teeth on the belt between the 2 camshaft pulleys, and 43 teeth on the belt between the driver's side camshaft pulley and the crankshaft mark.

If those are correct, you may have something else going on. A backfire is often caused by a vacuum leak or bad distributor position from the Ignition Timing.

Is your Ignition Timing correctly set to 14° TDC using a Timing Light? To set the timing, you would connect a timing light, loosen the bolt on the distributor and turn it slightly to get the Ignition Timing so that it blinks when the mark on the Harmonic Balancer is at the 14-degree mark.

Here is a video on how to set the Ignition Timing (on a 4-cylinder, but the principle is the same):