Advice sealing crank case/oil pan.

The place to discuss problems and routine maintenance questions and tips. This is for topics that are specifically diesel-related.
User avatar
I'm luving it
Regular Member
Posts: 211
Joined: Mon Apr 08, 2013 11:36 am
Location: Seattle, WA

Advice sealing crank case/oil pan.

Postby I'm luving it » Sun Jun 16, 2019 11:29 am

I installed the 4x4 oil pan on the diesel a couple months ago. Used RTV (Black) on the sides and proper corners (per the manual). I also used the correct rubber sealing pieces for the front and rear of the pan (from Jerry). Almost immediately the front and rear where the rubber goes started leaking almost right in the middle. The sides are dry. I torqued everything to spec. Going to try to and seal it again. It’s currently leaking too bad to drive.

Anybody out there have any suggestions this is a pain?
1982, Diesel, reguler cab, short bed, 5 speed, 2wd, 185/75/14, 2" exhaust, tiny tac, 35-40 mpg.
-1981, 4x4, 5 speed, Turbo diesel, long bed, Toyota axles, 33x10.50x15, 5.29 gears,

User avatar
Halden
Regular Member
Posts: 2918
Joined: Thu Mar 29, 2012 5:20 pm
Location: Everertt, WA
Isuzu vehicle(s): 1983 Diesel LS Long Bed 4x4

Re: Advice sealing crank case/oil pan.

Postby Halden » Sun Jun 16, 2019 5:25 pm

Did you put RTV in the groove on those main caps? and put rtv where those seals press up against on the pan?
It's not pronounced "Ih-soo-zoo", it's pronounced "It-screws-you"
83 LS Long Bed Diesel
64 Chevy C20 w/ 283 & 4 speed.
05 Sonata with a standard
At work: 2000 Blue Bird TC2000 w/ 5.9

User avatar
I'm luving it
Regular Member
Posts: 211
Joined: Mon Apr 08, 2013 11:36 am
Location: Seattle, WA

Re: Advice sealing crank case/oil pan.

Postby I'm luving it » Mon Jun 17, 2019 1:49 am

I did not put it in the grove. The manual only called for it around outer edge and corners were rubber seal meets. I will try that next time. So light coat RTV everywhere....
1982, Diesel, reguler cab, short bed, 5 speed, 2wd, 185/75/14, 2" exhaust, tiny tac, 35-40 mpg.
-1981, 4x4, 5 speed, Turbo diesel, long bed, Toyota axles, 33x10.50x15, 5.29 gears,

User avatar
puttputtinpup
Regular Member
Posts: 10712
Joined: Sat Oct 08, 2005 5:18 am
Location: Winston Salem, NC

Re: Advice sealing crank case/oil pan.

Postby puttputtinpup » Mon Jun 17, 2019 5:01 am

I've never done a pan gasket on a c223 but I have seen at advance Auto that there's different rtv for different applications. I've used one type made for exposure to transmission fluid. Purple tube I think. I used it last year when reassembling a mower hydrostatic transmission. It held up great

User avatar
Halden
Regular Member
Posts: 2918
Joined: Thu Mar 29, 2012 5:20 pm
Location: Everertt, WA
Isuzu vehicle(s): 1983 Diesel LS Long Bed 4x4

Re: Advice sealing crank case/oil pan.

Postby Halden » Mon Jun 17, 2019 9:40 pm

I'm luving it wrote:I did not put it in the grove. The manual only called for it around outer edge and corners were rubber seal meets. I will try that next time. So light coat RTV everywhere....


Interesting. I believe in my 82 manual it specifies to put it in the groove. I also put a rather generous amount in the corners against the caps. A ford I rebuilt had the same kind of thing. Really put a lot of the crap in there, doesn't leak a drop....
It's not pronounced "Ih-soo-zoo", it's pronounced "It-screws-you"
83 LS Long Bed Diesel
64 Chevy C20 w/ 283 & 4 speed.
05 Sonata with a standard
At work: 2000 Blue Bird TC2000 w/ 5.9

User avatar
I'm luving it
Regular Member
Posts: 211
Joined: Mon Apr 08, 2013 11:36 am
Location: Seattle, WA

Re: Advice sealing crank case/oil pan.

Postby I'm luving it » Sun Jul 14, 2019 12:50 am

Well I removed the pan again and resealed it with Ultra Black Sealant. I applied it generously all around including around the rubber seals on each end. It didn’t leak for almost two weeks.
Then today it really started leaking. It’s leaking from the ends where that rubber seal is. I cleaned it up then started the truck and could see the oil leaking out.
84B012CE-026F-4071-A243-B471F33DD211.jpeg

I definitely am tired of this problem. Ideas?
1982, Diesel, reguler cab, short bed, 5 speed, 2wd, 185/75/14, 2" exhaust, tiny tac, 35-40 mpg.
-1981, 4x4, 5 speed, Turbo diesel, long bed, Toyota axles, 33x10.50x15, 5.29 gears,