RB Tensioner VS Z31 Tensioner

[Booztd 3]

Guys

Ive read a few places that the tensioners are the same between the Z31 Motor and the RB motors, so I went and bought one from O-Reily Auto Parts....

Here's the results







Also the RB Lower Idler Pulley is identical to the Z32/VG Lower Idler Pulley, I'll try to get pictures of that in the next few days

[jrd450r]

So they are the same? Looks it but pictures are decieving. Also any idea where to get a new spring?

[Sil240]

Yeah are they???Can't tell from the picture.

[Booztd 3]

How much closer do you guys want them to be? lol

They are practically identical besides how the spring is held in place, which is neglible when it comes to mechanics. The bearings are not identical because the newer one is not OEM equipment, but I see no reason why anyone couldnt use this as a replacment. I plan on doing so

[midnightsliding]

im running a z31 tensioner

[Spazz]

im running a z31 tensioner

+1 for z31 tensioner

[Carl H]

the one on the left is how the new nissan bearings are supplied...

[Booztd 3]

the one on the left is how the new nissan bearings are supplied...

My guess is they did away with the slit where teh spring retainer goes, and went with the 'hole' design to eliminate the possibility of the spring popping out of position

[002-M-P]

Isn't there a difference between the tensioners on the different RB's?

[Carl H]

nope all the same except for the rb30de/t/t swap...single cam rb20's have a single timing belt tensioner bearing and thats it, but i think the block is still tapped for a twin cam setup.all twincam rb motors use the same timingbelt and bearings, only hybrids are diffrent.

[uber95]

How much did it run you? It's an aftermarket not a genuine Nissan correct?

[Racinjitter]

How much did it run you? It's an aftermarket not a genuine Nissan correct?

Here is a great link to the rb tensioners at a non US inflated price. http://www.nismoparts.com/catalog/?section=756 BTW the RB tensioner has the same part number as the Z31 VG30 engines.

[uber95]

Thanks for the link man!

[Darius]

I'm pretty sure my Z31 tensioner cost less than the one on nismoparts.com. It's the same part with the exact same dimensions. That slot in the tensioner for the spring makes me nervous about the possibility of improper installation and subsequent engine destruction. I'm glad nissan modified this into a hole instead of a slot.

[Booztd 3]

That slot in the tensioner for the spring makes me nervous about the possibility of improper installation and subsequent engine destruction. I'm glad nissan modified this into a hole instead of a slot.

I agree with you to a point, but you'd really have to be a dumbass to mess the installation of that tensioner up. If You didnt have the spring in the correct place, that pulley wouldnt sit flush up against the block, and you'd really notice something like that...

[Darius]

haha it isn't as noticeable as you'd think. I did it once and it took me a while to see that the belt was walking off of the tensioner because it had the spring pinched behind it. Must make me a dumbass

[002-M-P]

I just had another question based on this. I went to advance auto today and found a Z31 tensioner for $38...but then I looked up the lower idler pulley for the Z32...$180. I was perplexed. They had a left lower idler and a right lower idler (the right lower was the cheaper of the two). The one that is currently on backorder at nismoparts is only $30. Anybody have any further info on this?

[Booztd 3]

I just had another question based on this. I went to advance auto today and found a Z31 tensioner for $38...but then I looked up the lower idler pulley for the Z32...$180. I was perplexed. They had a left lower idler and a right lower idler (the right lower was the cheaper of the two). The one that is currently on backorder at nismoparts is only $30. Anybody have any further info on this?

Buy the OEM nissan lower idler pulley, its much cheaper and readily available.....

[002-M-P]

What was this I heard about a Lower left and lower right idler though?

[300Plus]

So is it safe to spread and lock in the fact that on the RB25 we can use the Z31 tensioner and the Z32 Idler ?

[Darius]

From what I remember about this, the Z32 idler was larger in diameter than the RB's. The Z31 tensioner has been a confirmed match for years in the parts thread.

[002-M-P]

Just wanted to bring this topic back up for a minute in relation to the Idler pulley. I really don't want to order a Z32 lower idler pulley if it isn't going to work. Also, Nissan wants $80 for the Z31 tensioner and $90 for the Z32 idler, when I could just get it from eric's performace on ebay for $150.

[Darius]

Get the Z31 tensioner from O'Reilly's for $35 and find the idler somewhere for $50 or so. (nismoparts.com)

[HxC_Nismo]

i didnt have much luck finding these at a local parts store so i just bit the bullet and bought my rb oem idler and tensioner from tophat for $150

[002-M-P]

Just got off the phone with Shay at nismoparts and the idler pullies are still out of stock at least a few more weeks. So something alternate is definately necessary if I don't wan to spend $150 on ebay for the combo. So anything else?

[Booztd 3]

Just got off the phone with Shay at nismoparts and the idler pullies are still out of stock at least a few more weeks. So something alternate is definately necessary if I don't wan to spend $150 on ebay for the combo. So anything else?

Just go to http://www.czp.us and buy the darn Z32 lower idler pulley already. Who cares if its a clit-hair's diameter in difference. I put these pulleys up side by side and I cant physically see the difference, and besides who really cares if the diameter is off a smidge? The tensioner (which is verified teh same) is what takes the slack out of the belt, and the only thing that would be affected is how fast/slow the idler turns....

[002-M-P]

Ok ok, I shall pull the trigger today on the Z32 idler...thanks

[Booztd 3]

Ok ok, I shall pull the trigger today on the Z32 idler...thanks

Atta boy

[002-M-P]

yes indeed, bought it and its on the way...also got a z31 tensioner on the way from advance...PE timing belt is also on its way from evasive...should have everything soon.

[FriedEGs]

is there a difference between turbo and non turbo?

(for z31 tensoiner and for the z32 idler)