Nismo vs. Nissan Motor Mounts

[Moto Man]

I've bought a set of new motor mounts for my 240... I decided to be conservative and get the Nissan mounts instead of the Nismo ones.

Anyhow, this presents an opportunity to resolve the debate over the height difference between the mounts. People who have installed the Nismo mounts have noticed that their engine sits higher than before. That is no doubt in part due to their old mounts sagging, but it could also be in part because the Nismo mounts were not designed for the KA24 engine.

So... I've measured my new mounts and found them both to be 69mm thick. Now, all we need is someone with a set of new, never used Nismo mounts to measure theirs and compare.

[let5l1de]

Interesting... I'd like to know myself... such a simple question can be answered here. Please answer the as i cant due to the last set of NISMO mounts recently were installed on the last sr swap.

I would bet not more than a couple mm difference. I think its mainly the compound of the NISMO mounts combined with the excessively sagging std engine mounts that exaggerate the end result.

[Moto Man]

I'm hoping to install these this weekend.

I'll rent an engine hoist. I'm assuming I'll need to get under the car as well. Should I buy jack stands, or would ramps be better? Do I need to raise both ends of the car, or is the front sufficient?

[let5l1de]

The engine hoist will be a great tool. As for lifting the front up.... it would aid in getting under the car to loosen the mounts front the bottom side. Ramps are fine. Jack stands are ok too...

FYI: Spray penetrating oil on all the nuts to be removed. The lower motor mt. nuts are often hard to remove. If you happen to strip a nut, buy a stripped nut removal kit. They work wonders... Its basically a socket of which contains reverse rotation teeth that spin into the nut casing resulting in more grip and eventually spinning the stubborn nut off. Also be sure to loosen the trans mt when replacing the motor mounts.

good luck

[Moto Man]

Well, I tried but was denied. The top bolts on the motor mounts were not a problem, but the bottom ones aren't moving.

A 14 mm wrench fits in there nicely, but I can't get enough leverage with that. So I got out my breaker bar, but the only way I could get it on is with the use of a swivel and a bunch of extensions. The whole assembly ended up being a bit sloppy and hard to really apply much torque.

What should I try next?

[zer0c123]

zerothread?id=194370

[artemous]

The mounts are identical in every way except that the nismo ones use a harder rubber and I believe have an inner reinforcment incase the rubber breaks. I am running the nismo and find them great. I also believe that the KA and SR mounts are the same for this car.

[Goldeneagle]

The mounts are identical in every way except that the nismo ones use a harder rubber and I believe have an inner reinforcment incase the rubber breaks. I am running the nismo and find them great. I also believe that the KA and SR mounts are the same for this car.

By way of looks...sure they are identical in every way. Nismo mounts are solid compared to the liquid/gel filled center on the OEM mounts.

Concerning the mounts being the same of the SR and KA.....that is under debate in other forums. Generally speaking if you use the left SR mount on the passenger side and the right mount on the driver's side they will work.

[l80_240]

i just measured my Nismo mounts, 1 is 69mm and 2 is 79mm, brand new still in box, part # 11210 & 11220 RS 520 they are CA mounts...
Modified by l80_240 at 12:24 PM 3/11/2007

[mrzabala]

Whats the height of that brand new ka motor mounts in terms of inches?

[JJ240]

I can tell you right now there is a difference. I have no idea what part of the mounts causes a KA to sit higher, but it most definetly does. My old S13 with nismo mounts had a hole rubbed in the black paper on the underside of the hood from the valve cover. It occurred after I changed to nismo mounts. And yes I'm sure the stock mounts were worn and sagged, but a new OEM mount would not have the valve cover rubbing on the hood.

[Soravia]

Is it because the SR20 valve cover is higher than KA cover? I don't know about the overall engine height/Mounting hole position though.

[guyaverage]

My Nismos pushed the engine up just a bit more than 3/4 inch from the stock mounts, thats with the Nismos swapped left for right, and right for left. There was about an inch of clearance between my strut bar and the valve cover before I put them on, and now its just a bit less than 1/4 inch.

[driftdude]

moto man, my username is driftdude my email is http://[email protected] I have a 92 240 sx hatchback with a ka motor on 3/27/07 I installed myself a pair of nismo motor mounts inplace of the stock nissan mounts. the engine height stayed exactly the same as the stock mounts. I no this because i have had a front shock tower brace connected that crosses over my valve cover with only 2 eigths of a inch clearence between brace and valve cover and the height remained the same. And also a nismo transmission mount works very well, clearence remanes the same as stock units. sincerly, the box canyon "dritdude".

[driftdude]

Moto man, driftdude again. I just read about the question on installing the motor mounts and I was told from Ray president of kaaz Lsd rearends. That was going to install the nismo mounts for me. That you would need a engine hoist to install them. But that is Not true to save my money I did it myself. All you need is 4 jackstands and a floorjack. Put the car on the stands on a level surface. And put a 8" long 2"x6" wood stud on the floorjack and place it under the oil pan with just barely any tension on it. Then theres a couple parts in the way power steering line and air fuel sencer and a hose to a smog device remove them to make room for wrenching. Than take out bolts on your your motor mounts jack engine up slow tell you feel it stop thats about 1" to 2" and do one mount at a time theres right and left side motor mounts dont install single bolts on the bottom of motor mounts tell both sides are done. Then lower floor jack slowly so motor mount bolts drop into frame mount holes all the way and install bottom motor mount bolts and tighten up and thats it. Reinstall all other parts. BAM!!! your done. sincerly, "Driftdude".

[let5l1de]

New stock Nissan mounts = 69mm

New NISMO Nissan mounts = 72mm (both left and right sides)

sry... no time to elaborate on technical detail...

[Moto Man]

Cool, thanks for the info let5|1de!

I finally replaced my mounts today. All of the bolts came off easily, some were not much more than finger tight,...except for two: the bottom bolts on the engine mounts. Even with a two foot breaker bar, they were almost impossible to get off. I don't know why as there was no corrosion at all.

Anyhow, the job is done and my engine is nice and tight again.

[Moto Man]

Looking back through this thread, there are conflicting reports about height differences. It may all be explainable, however.

I80_240 reports that his Nismo mounts are 69mm and 79mm, while let5l1de reports that both of his are 72mm.

I80_240 says he has parts 11210-RS520 and 11220-RS520, while let5|1de appears to have parts 11210-RS540 and 11220-RS540.

I believe the RS520 parts are for the CA engine, while the RS540 are for the SR engine.

It seems that the Nismo mounts will raise your engine a little bit, or a bunch, depending on which ones you get.

[realseals13]

So let me get this straight... U use the sr left mount and right sr motor mount then switch them and thats how you install them on a ka24e/de? I installed the left side with the left nismo motor mount and it seemed fine. Is this true?

[Moto Man]

The SR Nismo mounts are the same height (left and right), so switching them won't make a difference.

It's the CA Nismo mounts that should be switched to reduce clearance issues.

If you're buying Nismo mounts, buying the SR ones could save you some grief.

[zer0c123]

So let me get this straight... U use the sr left mount and right sr motor mount then switch them and thats how you install them on a ka24e/de? I installed the left side with the left nismo motor mount and it seemed fine. Is this true?

Yea you need to swap the mount of each side when installing on the KA24DE. Nismo mount L goes to the driver side and R goes to Passenger. I swapped them when i installed mine after reading several posts. I did not try to do the other way for a test fit, but some people have commented that if you don't swap them, then you will not be able to reinstall the metal bracket on the mount.

[dk1army]

dude to be honest i wouldnt rockem. i used nismo mounts and they are far inferior to homade mounts. theres diy on 240sx tech.com. hope that help later

[94_240sx]

My 14 years old stock mount is 61mm. And I have new Nismo mounts( 11210-RS540 & 11220-RS540). No wonder I feel that the engine raised up so much.

[brizanden]

ok dead thread revival but if the ca one is 69mm part no 11210-RS520 why not just get two of those? thus the stock height will remain.

[Skilz10179]

ok dead thread revival but if the ca one is 69mm part no 11210-RS520 why not just get two of those? thus the stock height will remain.

I was thinking the same thing.

It would also be nice to see more people measure these mounts as well as listing the measurments with their part numbers.

[Moto Man]

ok dead thread revival but if the ca one is 69mm part no 11210-RS520 why not just get two of those? thus the stock height will remain.

Hmm, interesting idea. There are minor differences between the left and right side mounts, though that's not prevented people from swapping them.

Somebody should do this and report back.

[derass]

Silly question but does the mount marked LN go on left (driver) side?

[zer0c123]

Silly question but does the mount marked LN go on left (driver) side?

EDIT !!!! Just noticed I actually responded to this post a while back. Dude read the posts above. The info is there.

[derass]

lol, sorry i didnt realize it was a thread about the KA motor... i have an SR but thank you for the info