I was checking to see if AEM made UR pulleys for the 350z. I did find that AEM doesn't make crank pulleys and this is the reason they gave.

Quote
"Virtually all of the cars we make Tru-Power pulleys for come equipped with a vibration dampener mounted to the crank from the factory. Aftermarket crank pulleys require the removal of these dampeners, which are required for engine life. Their removal can cause damage to your engine over time. If the manufacturers could save on vehicle costs by eliminating this device they would have done so."

Do our cars have a vibration damper and will installing a crank pulley hurt our engine?

 

what does it hurt btw???

does it blow it up into a million pieces with flaming rods shooting out like bullets or does it loosen some things or weaken the strength of things?

 

Oh no...

Please do a search for 'crank pulley' or something similar. There are plenty of very informative posts dealing with this very topic - as in, it's been discussed to death.

That said, I had an UR crank pulley on my '94 Z32 for over 80k miles with no problems at all...loved the boost in torque down low. I'll be installing one soon enough on my 350Z.

 

thats what I am trying to figure out, this caution on their website just threw me off

 

Good reading here:

https://my350z.com/forum/engine-and-drivetrain/30921-ur-pulleys-and-harmonic-balancers-in-general.html

 

Good golly miss molly that is a long thread, thanks for the link

 

what exactly has an engine failure due to attaching an airplane propeller to an engine have to do with a crank pulley?

And the guy is an engineer, lord have mercy.

 

Subscribing....

 

https://my350z.com/forum/search.php?forumid=50

search


I have the crank pulley on my car - I'm sure it isn't *good* for the engine, but I don't think it's gonna seriously hurt it - anytime soon anyway. I don't plan on my engine lasting 200k anyway....

 

a well designed pulley wont do damage. Many other cars besides the Z with 100k + on them with aftermarket pulleys that repalced stock ones similar to the one on the z have shown no abnormal wear.

 

Mods please burn/bury/destroy/kill/cauterize this thread. This issue has been covered way too many times!

 

I'm afraid it will never die until a knowledgable, competent Nissan (or other manufacturer's) engineer explains:
1) Why Nissan uses a damper in the first place.
2) Why it won't hurt the VQ to run without a damper.

 

What if a "knowledgable, competent...engineer" explains 1) but argues the opposite of what you imply in 2)? Would that send us back to square one?
--
Jeff

 

I'm not implying anything. It's a given that with the stock damper/pulley no harm will occur. If he explains why it won't hurt, then we'll all be free to use an un-dampered pulley without fear of premature failure. If he explains why it would hurt (the opposite), then that will convince those who are unsure that the safe thing to do is to stay away from them.

Having someone prove it one way or the other would close the issue, not send it back to square one.

 

i chose to error on the side of safety and longevity and removed mine.

 

Answer:
Because sometimes car companys do things that don't make sense. (I.E. Pontiac Aztek, The little flower vase on new VW bugs.)
Another dumb thing Nissan did was putting a plenum on the car that starves cylinders 5 and 6 for air. As a member who has a plenum spacer I am still scratching my head as to why nissan devised such an inefficient plenum. (I am sure, not so companies like Crawford Kinetix and AAM could make a killing selling aftermarket plenums!)
If you take the pulley and put it in your hand, you will see that the rubber insert does not separate two pieces of the pulley. Its just there.
Anyway the Z has been around for 3 years now. I have had my pulley for 2. I have yet to have a problem or hear of a problem on these boards.

So can we quit debating on this subject and quit wasting bandwidth? I mean shiat... They are now charging for memberships here. If we waste bandwidth on BS who knows whats next???

 

WTF? You mean I have to start paying to post here?

 

I have been unable to find an article that mentioned just that. The rubber piece is suppossedly NOT a dampener/elastomer like other non-internally balanced cars have but is there to reduce noise caused by the pulley possibly resting/coming into contact with the engine.

But I can't find the article again, so I can't post it for discussion. Sorry..........

 

i had one on my z for over 20000 miles, no probs with it at all. big improvement over the stock piece

 

ditto