Where to place jackstands without rear subframe?

need RX7 · 08-16-2010, 10:15 PM

Just like the title says, I began jacking up the rear of my FC, preparing to drop the rear subframe, when I discovered I didn't know where to put the jackstands once the subframe is gone. The only place I can see is those 'rails' that run along the underside, I've always avoided using those for anything since I've seen them crushed so bad.

Immediate help would be appreciated, the car is up in the air supported by the floor jack right now

.

josh18_2k · 08-16-2010, 11:29 PM

jack it up by the diff, then put jackstands under the pinchrails. if diff is too low, drive up on blocks or whatever.

RotorDad · 08-17-2010, 12:11 AM

Never mind! I agree above.

FC Zach · 08-17-2010, 01:49 AM

You could also use a "snowshoe" method and place a load displacing object (whatever you want to use such as a piece of wood) between the jackstand and the body but as close to the pinch weld as possible. That's if you're worried about destroying the said area.

***TitaniumTT*** · 08-17-2010, 06:55 AM

don't touch the pinch welds, especially if there is any type of surface rust ANYWHERE.

I use the "frame" rails underneathe the muffler heat shields. If you're dropping the subframe, the exhaust is gone so it's 3 10mm bolts and the heat shields are gone exposing a VERY stong jack point.

josh18_2k · 08-17-2010, 02:42 PM

ohh ive never pulled heat shields!

my pinch rails have been fine, but only like the rearmost 4" of it. beyond that they collapse. i have no rust tho

need RX7 · 08-17-2010, 05:20 PM

Quote:

Originally Posted by TitaniumTT

don't touch the pinch welds, especially if there is any type of surface rust ANYWHERE.

I use the "frame" rails underneathe the muffler heat shields. If you're dropping the subframe, the exhaust is gone so it's 3 10mm bolts and the heat shields are gone exposing a VERY stong jack point.

I'll unbolt them bitches right now.

NoDOHC · 08-18-2010, 10:50 PM

The rear tow hooks are another good spot

FC Zach · 08-19-2010, 12:04 AM

Quote:

Originally Posted by NoDOHC

The rear tow hooks are another good spot

That's what I always use, right on the two bolts.

08-16-2010, 10:15 PM	#1
need RX7 Clean S4 Nutswinger Join Date: Mar 2008 Location: Sterling Heights, MI Posts: 485 Rep Power: 18	Where to place jackstands without rear subframe? Just like the title says, I began jacking up the rear of my FC, preparing to drop the rear subframe, when I discovered I didn't know where to put the jackstands once the subframe is gone. The only place I can see is those 'rails' that run along the underside, I've always avoided using those for anything since I've seen them crushed so bad. Immediate help would be appreciated, the car is up in the air supported by the floor jack right now . __________________ -Ted -1986 Mazda RX7 Sport [DD/beater]: engine finally let go at 205k. parts car status. -1986 Mazda RX7 base [resto-mod project]: S5 n/a swap in progress.

08-16-2010, 11:29 PM	#2
josh18_2k Rotary Fanatic Join Date: Feb 2008 Location: Gresham, OR Posts: 473 Rep Power: 18	jack it up by the diff, then put jackstands under the pinchrails. if diff is too low, drive up on blocks or whatever. __________________

08-17-2010, 12:11 AM	#3
RotorDad Big Ugly Join Date: Apr 2009 Location: Fredericksburg, Va Posts: 591 Rep Power: 17	Never mind! I agree above. __________________ *Boosted Big Body On 335's* PS3 ID: Rotordad 1986 Mazda RX7 GXL - Street ported 13BT, Haltech, 62mm, ect. 2006 MazdaSpeed 6 - Eagle, Wiseco, Cobb, ect. Last edited by RotorDad; 08-17-2010 at 12:20 AM.

08-17-2010, 01:49 AM	#4
FC Zach RCC Loves Me Not You Join Date: Mar 2008 Location: Eagleville, TN Posts: 2,267 Rep Power: 20	You could also use a "snowshoe" method and place a load displacing object (whatever you want to use such as a piece of wood) between the jackstand and the body but as close to the pinch weld as possible. That's if you're worried about destroying the said area. __________________ 1993 Yamaha GTS1000 1992 Celica Turbo AllTrac 1987 RX7 Sport 1979 Yamaha G1, KM24 powered 1975 Dolmar KMS4

08-17-2010, 06:55 AM	#5
*TitaniumTT* Test Whore - Admin Join Date: Mar 2008 Location: Right Behind you son Posts: 4,581 Rep Power: 10	don't touch the pinch welds, especially if there is any type of surface rust ANYWHERE. I use the "frame" rails underneathe the muffler heat shields. If you're dropping the subframe, the exhaust is gone so it's 3 10mm bolts and the heat shields are gone exposing a VERY stong jack point. __________________ -The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. *-Angry Motherfcker Mode ENGAGED-**

08-17-2010, 02:42 PM	#6
josh18_2k Rotary Fanatic Join Date: Feb 2008 Location: Gresham, OR Posts: 473 Rep Power: 18	ohh ive never pulled heat shields! my pinch rails have been fine, but only like the rearmost 4" of it. beyond that they collapse. i have no rust tho __________________

08-18-2010, 10:50 PM	#8
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin Posts: 855 Rep Power: 17	The rear tow hooks are another good spot __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)