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Another Oil Leak Thread...

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Old Dec 1, 2018 | 09:47 AM
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Default Another Oil Leak Thread...

So, my Corvette is leaking oil fairly badly. I've got dye on order and intend to try to clean up and try the talc trick I've read about here. In the meantime, I thought I would check the torque on the pan and any other bolts I can find.



According to the torque specs I found here, the smaller bolts should be 80ftlbs and the larger 165. My torque wrench only goes up to 75 so, I'll have to go get a higher rated one but, tried hand tightening a few. They were awfully loose. My question is if the bolts were that loose, should the gasket be replaced as well or is proper torque enough?
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Old Dec 1, 2018 | 10:48 AM
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I think you need to read that torque spec again 80 ft lbs and 165ftlbs ???? on little oil pan bolts?? that should be INCH lbs.. you will twist them all off .. also you need to start in the middle and work alternating sides to each end
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Old Dec 1, 2018 | 11:28 AM
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Originally Posted by fishslayer143
I think you need to read that torque spec again 80 ft lbs and 165ftlbs ???? on little oil pan bolts?? that should be INCH lbs.. you will twist them all off .. also you need to start in the middle and work alternating sides to each end
We're both right.


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Old Dec 1, 2018 | 11:44 AM
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Originally Posted by anonimitie
We're both right.

No, your wrong, and so is that chart.
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Old Dec 1, 2018 | 11:49 AM
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Originally Posted by Big2Bird
No, your [sic] wrong, and so is that chart.

Nope, I'm 50% wrong. Repeating: "According to the torque specs I found here..." I misread one of the torque specs.
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Old Dec 1, 2018 | 12:02 PM
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screw vanity ... the table is wrong ...165 foot lb on pan rail is way too much ... heck thats double head bolt tq
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Old Dec 1, 2018 | 12:05 PM
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Originally Posted by jackson
screw vanity ... the table is wrong ...165 foot lb on pan rail is way too much ... heck thats double head bolt tq
No vanity involved. I didn't write the chart, I just quoted and misquoted it.
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Old Dec 1, 2018 | 12:30 PM
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are you using synthetic oil? if yes, go back to dinosaur oil and leaks may stop.
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Old Dec 1, 2018 | 12:52 PM
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Originally Posted by anonimitie
We're both right.

that chart is a typo... its inch pounds ..trust me.. its wrong.. you will snap those bolts right off..
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Old Dec 1, 2018 | 12:57 PM
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chart is right.
far right it says "in"
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Old Dec 1, 2018 | 01:07 PM
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Originally Posted by calwldlife
chart is right.
far right it says "in"
It says 165 FOOT LBS for end bolts THAT IS NOT RIGHT its a 5/16 grade 5 bolt... it will snap off.. Cylinder head bolts are only 90 Ft Lbs
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Old Dec 1, 2018 | 01:14 PM
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Originally Posted by fishslayer143
It says 165 FOOT LBS for end bolts THAT IS NOT RIGHT its a 5/16 grade 5 bolt... it will snap off.. Cylinder head bolts are only 90 Ft Lbs
yes.
wrong
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Old Dec 1, 2018 | 03:26 PM
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Originally Posted by dar322
are you using synthetic oil? if yes, go back to dinosaur oil and leaks may stop.
Huh. I am using synthetic oil. I'll give that a shot.
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Old Dec 1, 2018 | 03:30 PM
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Originally Posted by anonimitie
Huh. I am using synthetic oil. I'll give that a shot.
that's not going to work any better than tightening 165 ft lbs on the bolts .. synthetic oil does not cause leaks.. all gaskets made since mid 60s are compatible with synthetics
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Old Dec 1, 2018 | 03:45 PM
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Remove pan
Check pan rail/edge for straightness
Fix pan rail as needed
Acquire 1 piece Felpro gasket
Follow instructions
Re-install pan
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Old Dec 1, 2018 | 04:28 PM
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Originally Posted by jim2527
Remove pan
Check pan rail/edge for straightness
Fix pan rail as needed
Acquire 1 piece Felpro gasket
Follow instructions
Re-install pan
And torque oil pan bolts to proper specs, lol.
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Old Dec 1, 2018 | 06:31 PM
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Would like to point out a couple things about synthetic oil and oil seals/ gaskets.
1. Synthetic does not cause oil leaks when you change over from mineral base oil. What it does is clean/dissolve the carbon build up that the old seal/gasket was sales on. Carbon ring it is called by some.
2. If you go synthetic, and change back to mineral base after the seals start leaking, it probably will continue to leak because the carbon seal is no longer there.
As usual, YMMV
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To Another Oil Leak Thread...

Old Dec 1, 2018 | 07:40 PM
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FWIW, I have the same chart & numbers in my 1978 Chassis Service Manual.
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Old Dec 1, 2018 | 07:45 PM
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Originally Posted by karol
FWIW, I have the same chart & numbers in my 1978 Chassis Service Manual.
Perhaps a parting gift from a disgruntled ex GM employee.
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Old Dec 3, 2018 | 08:11 AM
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Thats what happen to me went from basic oil to Mobil 1 and back to basic. Leaks at the pan gasket all at once.
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