Ls Swap Oil Pan Hitting Frame on 84 Monte Carlo ss

Status
Not open for further replies.

junkyard junky

Not-quite-so-new-guy
Jan 12, 2016
21
2
3
Pulled the tired 305 out of my 84 Monte Cralo SS and putting a 2006 truck 5.3 in along with the transmission. Got the Holley engine mounts and 302-2 Holley oil pan. I can get the mount bolt in on each side but the oil pan is barely hitting the front crossmember. Called Holley's tech service but no one has any idea on what the problem is. Any help is appreciated.

ls swap1.jpg

ls swap5.jpeg

ls swap4.jpeg
 
  • Haha
Reactions: 1 user

Tony1968

Royal Smart Person
Supporting Member
Jul 1, 2018
2,313
5,100
113
NW Indiana
It looks like your mounts on the frame crossmember are too far forward. I believe they should be set back in other holes. The holley diagram should show the correct locations.
 
  • Like
Reactions: 2 users

Tony1968

Royal Smart Person
Supporting Member
Jul 1, 2018
2,313
5,100
113
NW Indiana
MOUNTSSSSS.jpg

Look closely where my mount is located and you can see the front hole is not used.
 
  • Like
Reactions: 1 users

64nailhead

Goat Herder
Dec 1, 2014
5,660
1
12,062
113
Upstate NY
It looks like your mounts on the frame crossmember are too far forward. I believe they should be set back in other holes. The holley diagram should show the correct locations.

X2 with Tony ^^^^

You could shim the frame mounts or engine pates as well. An 1/8 or 3/16" washer would do it. There is alot of info about these kits not having enough oil pan clearance - it's somewhat of a crap shoot imo.
 

oldsmobile joe

Royal Smart Person
Nov 12, 2015
2,067
3,053
113
mpls
I agree. The mounts are too far forward. Please read the the installation instructions. They are available on the holley site. Here are some pics of mine. I have an early frame and needed to drill some holes as stated in the directions.
20190829_083458.jpg
20190829_083505.jpg
20190829_091410.jpg
20190829_091418.jpg
 
  • Like
Reactions: 1 users

junkyard junky

Not-quite-so-new-guy
Jan 12, 2016
21
2
3
The pictures I posted were my second attempt. The first attempt was using the second holes. I couldn't get the holley brakets on the engine to line up with the frame mounts. The engine was hitting the ac box. Right now I have 7/8 inch of space from the firewall to the back of the cylinder head. Centerline of the first hole in the frame to center line of the second hole is an inch and 3/8.
 

jlcustomz

G-Body Guru
Nov 22, 2011
983
1,096
93
G-body frames & bodys have so many variables. I did my swap back in 02' making my mounts & notching & reboxing crossmember for f-body pan to fit .
I kinda have to say engine contacting ac box a little is about just right. I cracked & had to reseal the crack in case , as have many people I know of. I reused the same shorter driveshaft from my 1st gen engine in my location if that says anything.
Later swapped to fitting a vintage air system, really cleaned up the engine bay on pass rear side not having ac box hanging over.
 
  • Like
Reactions: 2 users
Status
Not open for further replies.

GBodyForum is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. Amazon, the Amazon logo, AmazonSupply, and the AmazonSupply logo are trademarks of Amazon.com, Inc. or its affiliates.

Please support GBodyForum Sponsors

Classic Truck Consoles Dixie Restoration Depot UMI Performance

Contact [email protected] for info on becoming a sponsor