LQ9 In a 1970 Suburban - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BigFatRedNeck · 02-24-2009, 12:26 AM

Has anyone put in a LQ9 into a 4WD Suburban? I'm going to mount it up to a 400 Turbo and was curious what type of issues to watch for. Motor Mounts? Cross Member placement. Transfer Case Linkage.

OldCreek · 02-24-2009, 02:23 AM

The great thing about putting it in a 4x4 is that you can potentially leave the t.c. in the stock location and then mount the motor anywhere it needs to be by sliding the mount forward or back.

Edit:
I dry fit sbc motor mount/diy4x4 first gen motor mounts today and they do not clear the oil pan. It looks like the 73+ mounts/crossmember clears just fine....

I was worried that there weren't enough threads about 4x4 GenIII/IV placements but it doesnt seem that big of a deal.

I should be mounting my LQ9 in my Blazer in the next week or so...then I can worry about all the other stuff...

sweet70beast · 02-27-2009, 12:06 AM

Dumb Question: What's a LQ9?

OldCreek · 02-27-2009, 01:04 AM

Its a 6.0L GenIII LSx motor. Probably the highest output truck motor of that generation...correct me if i'm wrong. It's just like the LQ4 but with flat top pistons (not dished) so it has a bit higher compression and, therefore, rated for more hp/tq. Iron block, aluminum heads. Was found it the Heavy Duty line of GM trucks and in some Cadillacs.

boostat4500 · 02-27-2009, 04:27 PM

I have one in my burb right now. Actually it's on a stand in the garage, prepping the burb for paint, but it was in there for the previous 2 years. It's a pretty easy swap in a 4x. I ended up using my stock tranny x-member in the factory location. Truck was originally a 4 speed. The engine crossmember I made myself so I can't help ya there. Glad to help with any specific questions you have or problems you run into, just let me know.

'63GENIII · 02-27-2009, 04:54 PM

I got my mounts from Summit. Haven't done the install as of yet, still have to send out the harness and computer. I'll be watching this thread. Money's kept me from getting more done. Your's should be a cool project!! Good Luck. Chris

AMD6769 · 02-28-2009, 12:10 AM

how about some pics guys

boostat4500 · 03-01-2009, 10:12 PM

Here's a couple. Far from pretty, but got the job done. When it goes back in after paint, it will look much better!

BigFatRedNeck · 12-01-2009, 01:11 AM

I dropped my suburban and LQ9 off at hillbillyhotrodz.com to have them properly mount the engine into the frame. I bought a couple of different conversion kits and nothing worked out for my talent level. I will post some pics after its complete and let you know how they did.

**Dieselwrencher** · 12-01-2009, 08:58 PM

That cross member almost looks like it is dropped enough to put a cummins in there.

Very nice transplant there!

Critter · 12-01-2009, 11:08 PM

Quote:

Originally Posted by OldCreek

Its a 6.0L GenIII LSx motor. Probably the highest output truck motor of that generation...correct me if i'm wrong. It's just like the LQ4 but with flat top pistons (not dished) so it has a bit higher compression and, therefore, rated for more hp/tq. Iron block, aluminum heads. Was found it the Heavy Duty line of GM trucks and in some Cadillacs.

I think you were spot on until your last sentence. The LQ9 (345 HP) was found in the Escalade, Chevy SS Silverado, and the Chevy/GMC Vortec Max, all which are "light duty" 1/2 ton platforms. The LQ4 (300-325 HP depending on the application) was the engine in the "heavy duty" 2500 and 3500 trucks, along with 3/4 ton Vans, GMC Denalis, 3/4 ton Suburban, 1500 HD, and the Hummer H2. Basically everything I said here is applicable for the older body style vehicles i.e 1999-2006.

By 2007 you start to see the LY6, L76, LFA, L92 which are similar but different.

...somebody correct me if I am wrong.

02-24-2009, 12:26 AM	#1
BigFatRedNeck Registered User Join Date: Feb 2009 Location: Lees Summit MO Posts: 2	LQ9 In a 1970 Suburban Has anyone put in a LQ9 into a 4WD Suburban? I'm going to mount it up to a 400 Turbo and was curious what type of issues to watch for. Motor Mounts? Cross Member placement. Transfer Case Linkage.

02-24-2009, 02:23 AM	#2
OldCreek Registered User Join Date: Jan 2007 Location: Central Coast California Posts: 1,026	Re: LQ9 In a 1970 Suburban The great thing about putting it in a 4x4 is that you can potentially leave the t.c. in the stock location and then mount the motor anywhere it needs to be by sliding the mount forward or back. Edit: I dry fit sbc motor mount/diy4x4 first gen motor mounts today and they do not clear the oil pan. It looks like the 73+ mounts/crossmember clears just fine.... I was worried that there weren't enough threads about 4x4 GenIII/IV placements but it doesnt seem that big of a deal. I should be mounting my LQ9 in my Blazer in the next week or so...then I can worry about all the other stuff... __________________ 1972 K20 Suburban 5.7/700r4/NP205 Dana 44/H052 Sold 1972 C10 5.3L/4L60E 12bolt 5Lug - Sold 1971 K5 Blazer 6.0L LQ9 4L60E NP205 Dana 44/H052!!! 1970 K3500 1ton CrewCab 8.1L/Allison1000/NP205 Dana 60/14B!!!! - Sold 1984 K10 SWB 7.4L/4L80e/NP208 Corp 10/12 bolt Sold 1988 V30 CCLB 7.4L/TH400/NP205/Dana 60/Dana 70/3.73!!! (Sold) 2003 K2500HD 8.1/Allison1000/NP263 Last edited by OldCreek; 02-24-2009 at 02:49 PM. Reason: wrong info!!!

02-27-2009, 12:06 AM	#3
sweet70beast Registered User Join Date: Sep 2006 Location: Shelley Idaho Posts: 876	Re: LQ9 In a 1970 Suburban Dumb Question: What's a LQ9? __________________ 1970 Nova 327/T5 (my 1st car) 1971 K-20 350/350/205 (winter DD) 1953 GMC Suburban 1968 Chevy Bel Air 1976 Chev C-10 1972 Skylark (suncoupe) 1 of 3943 made

02-27-2009, 01:04 AM	#4
OldCreek Registered User Join Date: Jan 2007 Location: Central Coast California Posts: 1,026	Re: LQ9 In a 1970 Suburban Its a 6.0L GenIII LSx motor. Probably the highest output truck motor of that generation...correct me if i'm wrong. It's just like the LQ4 but with flat top pistons (not dished) so it has a bit higher compression and, therefore, rated for more hp/tq. Iron block, aluminum heads. Was found it the Heavy Duty line of GM trucks and in some Cadillacs. __________________ 1972 K20 Suburban 5.7/700r4/NP205 Dana 44/H052 Sold 1972 C10 5.3L/4L60E 12bolt 5Lug - Sold 1971 K5 Blazer 6.0L LQ9 4L60E NP205 Dana 44/H052!!! 1970 K3500 1ton CrewCab 8.1L/Allison1000/NP205 Dana 60/14B!!!! - Sold 1984 K10 SWB 7.4L/4L80e/NP208 Corp 10/12 bolt Sold 1988 V30 CCLB 7.4L/TH400/NP205/Dana 60/Dana 70/3.73!!! (Sold) 2003 K2500HD 8.1/Allison1000/NP263

02-27-2009, 04:27 PM	#5
boostat4500 Registered User Join Date: Aug 2006 Location: Reno, NV Posts: 346	Re: LQ9 In a 1970 Suburban I have one in my burb right now. Actually it's on a stand in the garage, prepping the burb for paint, but it was in there for the previous 2 years. It's a pretty easy swap in a 4x. I ended up using my stock tranny x-member in the factory location. Truck was originally a 4 speed. The engine crossmember I made myself so I can't help ya there. Glad to help with any specific questions you have or problems you run into, just let me know. __________________ 1971 Suburban 4x4, LQ4 6.0L, 4L80E, etc.

02-27-2009, 04:54 PM	#6
'63GENIII Registered User Join Date: Sep 2008 Location: San Carlos, Ca. Posts: 3,048	Re: LQ9 In a 1970 Suburban I got my mounts from Summit. Haven't done the install as of yet, still have to send out the harness and computer. I'll be watching this thread. Money's kept me from getting more done. Your's should be a cool project!! Good Luck. Chris __________________ Chris '63 k15 long step Vortec 7.4 - L29 Blackbear tune, Five 0 Motorsports injectors, Chris Straub Cam, NV4500, divorced 205 52" front and 63" rear spring swap D44 / 14bff - disc axles Milemarker 9K and 10.5K hydraulic winches 63" & B52 Spring Install http://67-72chevytrucks.com/vboard/s...ng+swap+thread NV4500 Reverse Build Thread http://67-72chevytrucks.com/vboard/s...=reverse+build L29 - 7.4 Vortec Build http://67-72chevytrucks.com/vboard/s...&highlight=L29

02-28-2009, 12:10 AM	#7
AMD6769 Registered User Join Date: Nov 2006 Location: OAKLAND CALI Posts: 61	Re: LQ9 In a 1970 Suburban how about some pics guys

03-01-2009, 10:12 PM	#8
boostat4500 Registered User Join Date: Aug 2006 Location: Reno, NV Posts: 346	Re: LQ9 In a 1970 Suburban Here's a couple. Far from pretty, but got the job done. When it goes back in after paint, it will look much better! Attached Images __________________ 1971 Suburban 4x4, LQ4 6.0L, 4L80E, etc.

12-01-2009, 01:11 AM	#9
BigFatRedNeck Registered User Join Date: Feb 2009 Location: Lees Summit MO Posts: 2	Re: LQ9 In a 1970 Suburban I dropped my suburban and LQ9 off at hillbillyhotrodz.com to have them properly mount the engine into the frame. I bought a couple of different conversion kits and nothing worked out for my talent level. I will post some pics after its complete and let you know how they did.

12-01-2009, 08:58 PM	#10
Dieselwrencher 6>8 Plugless........ Join Date: Sep 2007 Location: Prairie City, Ia Posts: 17,140	Re: LQ9 In a 1970 Suburban That cross member almost looks like it is dropped enough to put a cummins in there. Very nice transplant there! __________________ Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project *Tired of spark plugs? Check this out.*



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