learn a little about your car before lifting it

[xkamikazestormx]

Originally Posted by Def

I'm pretty sure there is a diagram in the FSM that states the front/rear of the "framerails"/crossmembers being the preferred place for putting a jackstand.

There's no way I could ever jack my front subframe, and my car isn't even that low.

if i can get a jack under my front crossmember, im pretty sure you can. just use wood

[surreybc]

Originally Posted by Def

I'm pretty sure there is a diagram in the FSM that states the front/rear of the "framerails"/crossmembers being the preferred place for putting a jackstand.

There's no way I could ever jack my front subframe, and my car isn't even that low.

the picture in the OP's post is from the fsm. you jack the front suspension member and the differential in rear.

[C. Anderson]

I use the diff for raising the rear and the lower rad support for the front. I've been doing this for 6 years on all of my s chassis and have not messed up anything.

[Def]

Originally Posted by surreybc

the picture in the OP's post is from the fsm. you jack the front suspension member and the differential in rear.

So like I said, the FSM(at least the S13 KA24DE Chuki one I took these pics from) specifically says to put jackstands on the "framerails."

The page number is referenced in the 2nd pic.

No idea what other FSM pic the OP pulled that pic from, but his advice isn't applicable to S13s according to Nissan.




Here's the pic specifying using the pinchwelds on a 4/2 post lift.

[surreybc]

The OP better clarify where he got that diagram. maybe it is for s14.

[C. Anderson]

Originally Posted by surreybc

The OP better clarify where he got that diagram. maybe it is for s14.

The original diagram posted is from a s14 fsm. You can tell by the fuel tank placement. S14's have the fuel tank just behind the rear seats and s13's have their tank under the trunk.

[CoreyS13]

Okay, here is a picture of where i jacked it up and placed the jack stand when replacing front driver side rotor. Tell me if this is correct positioning.

[xkamikazestormx]

that is NOT the correct place.

[CoreyS13]

Please correct that then should I be jacking farther to the front or what?

[xkamikazestormx]

jack up the front from the front crossmember. the rear jack it up from the diff

[drift freaq]

Originally Posted by JRas

I've decided to make this thread to attempt to educate people on the design of their cars. It's come to my attention that people don't know, that their cars DO NOT have an frame-rails. The 240sx is a unibody meaning all the structural strength is from the external skin.

to read more about this structural design I recommend reading the link below:
Monocoque - Wikipedia, the free encyclopedia



these long beam type things that come down the middle of the car are called side members as you can see from the picture. This is not a frame-rail like most assume.. these are not designed to be lifted from under any circumstance.

[/B]

I will, Are cars are not full Monocoque they are semi Monocoque and though the service manual calls the rails side members they are basically a subframe rail.
Reason is they extend back from the front of the car. Both the core support and the inner fenderwells are attached to them. The Monocoque part is the passenger area back to the rear trunk or hatch area. These actually extend farther back than the Japanese domestic market ones because of federal crash safety standards.

Unlike a Honda Civic which actually is a full Monocoque chassis. If you doubt this? Ask any local body guy worth a damn and he will explain it to you, as well.

[CoreyS13]

Okay, the KA is coming out and I wanna make sure the jackstands will be in the best possible positioning. I'm thinking if they are on the cross member I may be sort of cramped. The pinch weld on the passenger front side is somewhat messed up. Any suggestions?

[jspaeth]

"........well my friend said you are supposed to jack it up from under the intercooler"

[SlideWell]

im sure nothing i can say or show will enlighten some of you, but for those who have not seen a clip or inside of the unibody, here's a pic. if you dont know where to jack a car up, i worry about our youth.

[ManoNegra]

^seriously
and for those those that mentioned lowered cars
just drive onto 2X6s or 2x4s to get that needed additional clearance
to get a jack under the crossmember.

I actually use those $20 plastic ramps they sell at auto stores with 2x4s in front.
works like a charm.

[surreybc]

re 1991 s13

I wont be jacking from suspension(cross) member or the differential unless I want to lift both wheels. The side member works fine and I have jacking knobs for the rear. Its quite hard to get the jack under the cross member. I do have the steel ramps and use them sometimes.(maybe i have jacking knobs because of lsd or hicas.no idea)

truthfully, i didnt even realize that jack position and stand postiion would be different. anyway, lets insult people to deter them from asking questions. people should learn the hard way.

[konichiwabeezy]

So for the rear, you place the jack directly under the differential??

[h2v7]

yea if you can get it under there but i assume its lowered and may need driven on something to raise it high enough to jack it up.

[konichiwabeezy]

Okay and it won't damage the diff right?

[purplove]

I'll admit it, I learned the hard way but figured this out on my own.

[Agamemnon]

You guys realize this is a 4 year old thread right?

[TheRealSy90]

So thats why my "framerails" are flat under the seats... Idiots...

[dawagarage]

here's a diagram of the Z32's jack points & safety stand points for anyone who needs it

[dawagarage]

Originally Posted by Agamemnon

You guys realize this is a 4 year old thread right?

dammit, didnt notice that. oh well, still important knowledge for the newer zilvians