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Old 08-12-2018, 10:36 PM   #26
Steeveedee
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Re: Harmonic b

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Originally Posted by LockDoc View Post
Good deal. Glad you got that solved.

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Yup, that's the sound I was talking about. Right on!
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Old 08-13-2018, 01:20 AM   #27
71CHEVYSHORTBED402
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Re: Harmonic b

I'm installing one myself soon. Here's an excellent video, this guy is real good, though he seems to have more faith in experience than torque wrenches https://www.youtube.com/watch?v=R7BuijqjcUk


Not saying you didn't, but the bolt inserted into the crank has to bottom out. Otherwise you're tearing up threads as you tighten the balancer.
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71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025
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Old 08-13-2018, 07:50 AM   #28
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Re: Harmonic b

Here is an explanation of why you apply grease to the back of the crank seal , It's just a safety measure but if the spring does come off when your replacing the seal with the timing cover on the engine it eventually will end up in your oil pan and nobody wants pieces of spring steel getting sucked up into your oil pump . I've seen it happen . This is why I pull timing covers to replace crank seals .

https://www.youtube.com/watch?v=WOfOHMI6Wnc

https://www.youtube.com/watch?v=1MzHlqQFHcs

Last edited by Grumpy old man; 08-13-2018 at 08:04 AM.
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Old 08-13-2018, 09:44 AM   #29
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Originally Posted by Grumpy old man View Post
Here is an explanation of why you apply grease to the back of the crank seal , It's just a safety measure but if the spring does come off when your replacing the seal with the timing cover on the engine it eventually will end up in your oil pan and nobody wants pieces of spring steel getting sucked up into your oil pump . I've seen it happen . This is why I pull timing covers to replace crank seals .

https://www.youtube.com/watch?v=WOfOHMI6Wnc

https://www.youtube.com/watch?v=1MzHlqQFHcs
funny thing is ,that spring came flying off as soon as we took the cover off , and yes nobody wants pieces of steel flying around in there
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Old 08-13-2018, 09:45 AM   #30
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Originally Posted by 71CHEVYSHORTBED402 View Post
I'm installing one myself soon. Here's an excellent video, this guy is real good, though he seems to have more faith in experience than torque wrenches https://www.youtube.com/watch?v=R7BuijqjcUk


Not saying you didn't, but the bolt inserted into the crank has to bottom out. Otherwise you're tearing up threads as you tighten the balancer.
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Old 08-13-2018, 09:48 AM   #31
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Good deal. Glad you got that solved.

LockDoc
Thanks LockDoc
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Old 08-24-2018, 03:47 PM   #32
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Re: Harmonic b

Well folks got the truck started sounded good but now we have hemorrhage from the bottom of timing cover /oil pan meet ,would it be safe to say its the oil pan gasket ,i did replace the half moon one but i guess it did not seat correctly ,thanks again
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Old 08-24-2018, 04:30 PM   #33
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Re: Harmonic b

Did you use the right one?
There are two.
Different thicknesses.
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Old 08-24-2018, 05:04 PM   #34
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Re: Harmonic b

Back to your messed up threads in the snout of the crank.

Google "Bottoming Tap". You can usually cut a few more threads in there with one.
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Old 08-24-2018, 09:56 PM   #35
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Re: Harmonic b

I've seen people drill out a crank with stripped threads and rethread it for a larger bolt, I believe it was a 3/4 bolt.
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Old 08-24-2018, 10:00 PM   #36
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Did you use the right one?
There are two.
Different thicknesses.
I used the one that came with the timing cover gasket which was the right one ,i did put them side to side and they were the same ,.
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Old 08-24-2018, 10:02 PM   #37
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Re: Harmonic b

Did you lower the pan when you put the timing cover back on?
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Old 08-24-2018, 10:03 PM   #38
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Back to your messed up threads in the snout of the crank.

Google "Bottoming Tap". You can usually cut a few more threads in there with one.
I did run a 7/16 20 in there , the initial 1/4 inch threada were bad just deep wnough for the bolt to slip ,i got a longer bolt and cut it down a bit and it was able to grab enough to tighten ,its all good now .
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Old 08-24-2018, 10:05 PM   #39
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I've seen people drill out a crank with stripped threads and rethread it for a larger bolt, I believe it was a 3/4 bolt.
Its all good bow ,but if i have to take it off again ill have to go that route.
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Old 08-25-2018, 08:35 AM   #40
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Did you lower the pan when you put the timing cover back on?
Oh oh ,i most certainly did not ,smh
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Old 08-25-2018, 08:44 AM   #41
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Re: Harmonic b

Oh, oh is right.
Likely knocked the gasket outta place.
There’s two ways to fix it.
One is drop the front of the pan about 1/2 inch so the timing cover gasket stays in place.
Two is leave the pan alone and modify the cover bottom channel.
Like this. Pic-in here and explanation.
https://forums.iboats.com/forum/engi...ng-the-oil-pan
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Old 08-25-2018, 08:54 AM   #42
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Quote:
Originally Posted by geezer#99 View Post
Oh, oh is right.
Likely knocked the gasket outta place.
There’s two ways to fix it.
One is drop the front of the pan about 1/2 inch so the timing cover gasket stays in place.
Two is leave the pan alone and modify the cover bottom channel.
Like this. Pic-in here and explanation.
https://forums.iboats.com/forum/engi...ng-the-oil-pan
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Old 08-25-2018, 09:03 AM   #43
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Quote:
Originally Posted by geezer#99 View Post
Oh, oh is right.
Likely knocked the gasket outta place.
There’s two ways to fix it.
One is drop the front of the pan about 1/2 inch so the timing cover gasket stays in place.
Two is leave the pan alone and modify the cover bottom channel.
Like this. Pic-in here and explanation.
https://forums.iboats.com/forum/engi...ng-the-oil-pan
i got me in this mess , looks like ill just change the oil pan gasket and be done with it hell of a lot easier than taking timing cover off if it was the seal.

Thanks for the info and help..
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