LM7 5.3L to F-body oil pan

[mrhurt73]

I have a 2001 LM7 5.3L engine i am putting in a 1979 chassis that is lowered on airbags. when the truck is lowered, the oil pan sits right on the ground.
kind of thought it would.

i was thinking of using a F-body oil pan to gain plenty of clearance.

i found these numbers, anybody know if they are correct? or anybody made this change?

12558762 oil pan
12558251 pickup tube
12558253 windage tray

any advice would would be great.

[LEEVON]

I'm not sure about the part numbers, but the F-body pan will solve your problem, I think it's only about 5.5" deep. I have one on my airbagged '50, Mustang II front with 5.3L and it's a good inch or two higher than the crossmember.

My only tips are be careful of used pans, look very closely for cracks. Also, there is a special alignment procedure for these pans. I think CTS-V and a couple of other styles will work too.

Leevon

[Bagood]

I have an 05 5.3 and swapped to a f body pan.....pace performance has an entire setup( dipstick, tube, windage tray, pan, gasket, bolts, pickup tube) it ran me 320 shipped to me. not sure of your budget but I thought it was a fair deal

[mrhurt73]

Originally Posted by LEEVON

I'm not sure about the part numbers, but the F-body pan will solve your problem, I think it's only about 5.5" deep. I have one on my airbagged '50, Mustang II front with 5.3L and it's a good inch or two higher than the crossmember.

My only tips are be careful of used pans, look very closely for cracks. Also, there is a special alignment procedure for these pans. I think CTS-V and a couple of other styles will work too.

Leevon

tell me more of this alignment procedure? what do you have to do?

Originally Posted by Bagood

I have an 05 5.3 and swapped to a f body pan.....pace performance has an entire setup( dipstick, tube, windage tray, pan, gasket, bolts, pickup tube) it ran me 320 shipped to me. not sure of your budget but I thought it was a fair deal

hmm pace performance? will have to do web search, thanks for the info.

[ls1nova71]

Originally Posted by mrhurt73

tell me more of this alignment procedure? what do you have to do?

Basically, you just want to make sure the back edge of the pan is aligned with the back of the block due to the fact that the transmission bolts to it. If it's overhanging the block, or in too far, bolting the transmission up tight will cause alignment issues. The shop manual says to put a straight edge on the back side, but it's not practicle if the engine is in the vehicle. Also, put a dab of silicone on the 4 corners of the pan gasket where the front and rear covers meet the block to prevent leaks, there is a little crosshatch area on the gasket in those areas if I remember correctly.

[mrhurt73]

after measuring again

maybe a CTS-V pan would be best
CTS-V oil pan: Part#12605814
Oil pan defector: Part# 12611129
Oil pump pickup: Part# 12621299
Oil dipstick tube: Part# 12584737
Oil dipstick: Part# 12584738

anybody used the cadillac pan?

[68Stepbed]

I used an f-body pan in my swap and it has great clearance. The stock truck pan hung too low for comfort for me and I'm only static dropped 4.5". I got my stuff used from www.ls1tech.com classifieds.

[mrhurt73]

Originally Posted by ls1nova71

Basically, you just want to make sure the back edge of the pan is aligned with the back of the block due to the fact that the transmission bolts to it. If it's overhanging the block, or in too far, bolting the transmission up tight will cause alignment issues. The shop manual says to put a straight edge on the back side, but it's not practicle if the engine is in the vehicle. Also, put a dab of silicone on the 4 corners of the pan gasket where the front and rear covers meet the block to prevent leaks, there is a little crosshatch area on the gasket in those areas if I remember correctly.

thanks my engine came from the wrecking yard with the bellhousing bolts loose, might take it off and align it that way. is the 4L60E same as TH400 that you have to spin torque converter until it falls in pump before bolting up?

[Daaaanz67]

I have in my 69 c10 sits abou 1/2 inch above x member but I think it depends on which motor mounts your using here some photos
Posted via Mobile Device

[ls1nova71]

Originally Posted by mrhurt73

is the 4L60E same as TH400 that you have to spin torque converter until it falls in pump before bolting up?

Definitley! If it's not seated all the way you'll ruin the pump! Had a buddy do that on a fresh rebuild, he got the fun of pulling it again.

[mrhurt73]

Originally Posted by Daaaanz67

I have in my 69 c10 sits abou 1/2 inch above x member but I think it depends on which motor mounts your using here some photos
Posted via Mobile Device

which pan is that? hard to tell upsidedown

[mrhurt73]

now it looks like the caddy pan after some serious web surfing.
but i am going to wait until motor mounts come back and measure again before i order pan. dont want to send two back.

[68Stepbed]

F-body pan vs. truck pan

[68Stepbed]

This is in my 68, which is similar chassis design as a 79.

[Hart_Rod]

Originally Posted by mrhurt73

after measuring again

maybe a CTS-V pan would be best
CTS-V oil pan: Part#12605814
Oil pan defector: Part# 12611129
Oil pump pickup: Part# 12621299
Oil dipstick tube: Part# 12584737
Oil dipstick: Part# 12584738

anybody used the cadillac pan?

I used an 07 CTsV pan and it worked great with the ECE motor mounts. Here's another thread with all the different oil pans:

http://www.gmtruckhq.com/lsx-tech/ls...them-2720.html

Originally Posted by ls1nova71

Basically, you just want to make sure the back edge of the pan is aligned with the back of the block due to the fact that the transmission bolts to it. If it's overhanging the block, or in too far, bolting the transmission up tight will cause alignment issues. The shop manual says to put a straight edge on the back side, but it's not practicle if the engine is in the vehicle. Also, put a dab of silicone on the 4 corners of the pan gasket where the front and rear covers meet the block to prevent leaks, there is a little crosshatch area on the gasket in those areas if I remember correctly.

I swapped out my pan when the engine and tranny was still bolted together. At the time, I didn't know that there was a particular procedure to do this, I just bolted it on. Is there anything I can do to double check and make sure I have it installed correctly? The motor and transmission are already bolted in... Thanks in advance and sorry for the hi-jack....

Edit: Here's another thread:

http://67-72chevytrucks.com/vboard/s...d.php?t=272174

[mrhurt73]

Originally Posted by Hart_Rod

I used an 07 CTsV pan and it worked great with the ECE motor mounts. Here's another thread with all the different oil pans:

http://www.gmtruckhq.com/lsx-tech/ls...them-2720.html

I swapped out my pan when the engine and tranny was still bolted together. At the time, I didn't know that there was a particular procedure to do this, I just bolted it on. Is there anything I can do to double check and make sure I have it installed correctly? The motor and transmission are already bolted in... Thanks in advance and sorry for the hi-jack....

Edit: Here's another thread:

http://67-72chevytrucks.com/vboard/s...d.php?t=272174

good site, confirmed what i was thinking........

don't worry about the hi-jack, it might have an answer i wanted to know

[mrhurt73]

see the pictures i modified, i am thinking the caddy pan is best fit. second picture said holden, but looks real similar to caddy pan.

[Hart_Rod]

Originally Posted by mrhurt73

see the pictures i modified, i am thinking the caddy pan is best fit. second picture said holden, but looks real similar to caddy pan.

I posted pictures of the caddy pan installed in my burb build thread.

[mooseknuckles]

gm musclecar pan in my 86....kinda hard to tell, but it's about 3/4" above the bottom of the crossmember.....If I was doin it over I'd get the f-body pan or the Holley pan....

[crazy longhorn]

Originally Posted by mooseknuckles

gm musclecar pan in my 86....kinda hard to tell, but it's about 3/4" above the bottom of the crossmember.....If I was doin it over I'd get the f-body pan or the Holley pan....

I am looking @ the Gm musclecar pan for my 69, but a ? What would sway you to the other 2 pans that you mentioned...(oil capacity, fit, ect.)? crazyL

[mooseknuckles]

the f-body and holley pan are shorter still....more ground clearance..

[crazy longhorn]

Thanks I see the truck in your avitar....mine is lowered, but not "slammed'. I think the pan will work out for my app crazyL

[ZR2RICK]

I also have a 5.3l in a TF chevy truck, I did use an Ls1 pan but would probably go with the Caddy pan if I was to do it again, the camaro pan is shallower but the sump is longer front to back if you are running a camaro or similar clip the fit is very tight from rear of crossmember to front of sump with the engine set very close to the firewall.

[mrhurt73]

does anybody know if these are current GM numbers?

CTS-V oil pan: Part#12605814
Oil pan defector: Part# 12611129
Oil pump pickup: Part# 12621299
Oil dipstick tube: Part# 12584737
Oil dipstick: Part# 12584738


also anywhere to get these besides GM dealers or GMpartsdirect?

[68Stepbed]

Check the classifieds at ls1tech.com. That's where I got most of my stuff.