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#1 |
Senior Member
![]() Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,922
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Oil Pan Clearance
I'm putting a 5.7 Vortec from a 98 Chevy into my 72 Blazer 4WD. The oil pan hits the engine cross member before the motor mounts sit on the towers. The mounts are new. There's about 1/8 inch between the towers and the mounts.
Do I need to change my oil pan, or should I use spacers on the mounts? Another question: Do the towers go on top of the frame rail or under it? I can't find any good pictures of 4WD towers, and it's been 5 years since I disassembled this.
__________________
I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson |
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#2 |
Registered User
Join Date: Apr 2014
Location: Azle,Texas
Posts: 2,248
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Re: Oil Pan Clearance
Not sure if the 4wd is the same or not, but the stands sat on top of the rails in my 72 c10.
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#3 |
Registered User
Join Date: Nov 2014
Location: Bigfork, Montana
Posts: 1,137
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Re: Oil Pan Clearance
Looking at your pic, it looks like my stock vortec pan steps down further back. No fitment issues on '70 K20.
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#4 |
Senior Member
![]() Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,922
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Re: Oil Pan Clearance
I ended up replacing the oil pan with a 4 quart pan (5 with filter) and it went in fine. Lesson learned - the 6 quart Vortec pan doesn't fit.
__________________
I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson |
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#5 |
Registered User
Join Date: May 2016
Location: Henderson NC
Posts: 975
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Re: Oil Pan Clearance
Just wondering did your motor come out of a 2500 4-wheel drive?
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#6 |
Senior Member
![]() Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,922
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Re: Oil Pan Clearance
I'm actually not sure. The engine had been transplanted into a 87 Jimmy, but it was supposedly from a 98. The previous owner of the Jimmy had done a hack job of the installation but I was able to drive it home (barely).
__________________
I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson |
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#7 |
Registered User
Join Date: May 2016
Location: Henderson NC
Posts: 975
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Re: Oil Pan Clearance
Just wondering because if I remember right the 4-wheel drive had a bigger oil pan and they look like 3/4 ton 906 casting marks on the heads. I just looked at my heads on my truck and yours look close but a little different. The 1/2 ton 062 heads have a saw blade casting mark.
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#8 |
Senior Member
![]() Join Date: Jun 2017
Location: burlington north carolina
Posts: 1,030
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Re: Oil Pan Clearance
the make a replacement pan just for that i saw it on parts web site today
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#9 | |
Senior Member
![]() Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,922
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Re: Oil Pan Clearance
Quote:
__________________
I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson |
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