Author Topic: 69 th350 leaks  (Read 5667 times)

1969RSCamaro

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69 th350 leaks
« on: February 08, 2015, 03:09:55 AM »
I have a leaking trans pan. what do you have to do to change it? I am guessing support the tail end and pull mount and cross member to get access to rear pan bolts?

ko-lek-tor

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Re: 69 th350 leaks
« Reply #1 on: February 08, 2015, 03:39:24 AM »
Moderator needs to move this to maintenance. I have changed oil without having to remove any of mentioned items. You may need a swivel socket to gain access to rear bolts. While pan is off, you should dimple the holes with a ball pean hammer to restore holes to being flat with surface. Most leaks occur from overtightening the pan. I believe spec, without looking up, is around 25 inch pounds or about what would be achieved using a 1/4 inch ratchet.
James to strangers, Bentley to friends
1969 SS/RS 396 coupe Hugger Orange X22 712 bought in 79
1969 SS 350 coupe LeMans Blue 713 bought in 79
1969 307 4spd. coupe Daytona Yellow 711 bought in 85

firstgenaddict

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Re: 69 th350 leaks
« Reply #2 on: April 02, 2015, 03:07:07 PM »
Moderator needs to move this to maintenance. I have changed oil without having to remove any of mentioned items. You may need a swivel socket to gain access to rear bolts. While pan is off, you should dimple the holes with a ball pean hammer to restore holes to being flat with surface. Most leaks occur from overtightening the pan. I believe spec, without looking up, is around 25 inch pounds or about what would be achieved using a 1/4 inch ratchet.

The tapping the pan rails back flat is a MUST to keep them from leaking... any sheetmetal cover should have this done... valve covers, timing chain cover, oil pan, diff cover etc etc
James
Collectin' Camaro's since "Only Rednecks drove them"
 
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zman1969

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Re: 69 th350 leaks
« Reply #3 on: April 03, 2015, 01:49:46 PM »
FWIW I had a 76 Cutlass with T-350 that I replaced the pan gasket 2-3 times only to find out side servo cover O-ring was leaking and running to the pan. lesson learned
ALWAYS diagnose the problem right the first time makes repairs less of a whipping in the long run
Rich

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mikefam

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Re: 69 th350 leaks
« Reply #4 on: April 30, 2015, 10:53:31 AM »
I replaced my pan gasket with a MR Gasket aluminum pan. It came with a thick rubber gasket and is nice and dry now. I did remove the bolts from the rear motor mount and frame cross support and slid the support rearward a few inches by tapping it with a hammer. It was not very difficult to do and worth the effort.

Mike.
68 Convertible w/327 275hp donor engine from a 67 Impala and TH350