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Old 07-26-2019, 01:00 AM   #1
82Diesel
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Thumbs up GM Truck Hydro-Boost Sealkit ?

I have an 82 K10 Diesel, It was Converted to Gas (SBC 305) But original Diesel had a hydro-boost! I've been converting it back over to diesel so I bought a 3/4 Ton Diesel truck that's the same year, engine besides being 2wd...

Anyhow, I think the one from my parts truck was leaking right behind the master So I was just gonna buy a brand new one unless I can get a Seal kit or rebuild kit for it Is that even possible for the Older 73-87 Hydro-Boosts, Do they have any part numbers on them or anything like that?? Thanks
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Old 07-26-2019, 03:28 AM   #2
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Re: GM Truck Hydro-Boost Sealkit ?

Yep...you can buy rebuild kits....check pirate jacks...
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Old 07-26-2019, 11:33 AM   #3
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Re: GM Truck Hydro-Boost Sealkit ?

I'm glad this came up. I went through 3 Duralast rebuilds before making them get one from another vendor a couple years ago. Even this one leaks constantly. Went to get a new one and they quit carrying the brand I got, and their house brand is out of stock with no ETA on availability. There was a thread here a while back about rebuilding them and it looked pretty straightforward. I just couldn't remember where to get the kit.
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Old 07-26-2019, 03:48 PM   #4
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Re: GM Truck Hydro-Boost Sealkit ?

For those of you wanting to try a rebuild on your own...

https://piratejack.net/hydro-boost-rebuild-kits/
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Old 07-26-2019, 07:06 PM   #5
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Re: GM Truck Hydro-Boost Sealkit ?

Agree on piratejack for the rebuild kit.

Rebuild instructions here.

https://www.oilburners.net/threads/h...al-long.72688/
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Old 07-26-2019, 07:08 PM   #6
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Re: GM Truck Hydro-Boost Sealkit ?

Quote:
Originally Posted by kipps View Post
Agree on piratejack for the rebuild kit.

Rebuild instructions here.

https://www.oilburners.net/threads/h...al-long.72688/

Do you have a kit? I need the number off one of the seals.
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Old 07-26-2019, 07:41 PM   #7
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Re: GM Truck Hydro-Boost Sealkit ?

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Do you have a kit? I need the number off one of the seals.
Have already installed the kit into the hydroboost, but haven't installed the hydroboost into the truck yet.
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Old 07-26-2019, 10:03 PM   #8
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Re: GM Truck Hydro-Boost Sealkit ?

Very timely; thanks for posting everyone.

K
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Old 07-27-2019, 07:49 PM   #9
82Diesel
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Re: GM Truck Hydro-Boost Sealkit ?

Quote:
Originally Posted by DieselSJ View Post
I'm glad this came up. I went through 3 Duralast rebuilds before making them get one from another vendor a couple years ago. Even this one leaks constantly. Went to get a new one and they quit carrying the brand I got, and their house brand is out of stock with no ETA on availability. There was a thread here a while back about rebuilding them and it looked pretty straightforward. I just couldn't remember where to get the kit.
Your welcome, It's been something I've been "Pondering" about in my mind for the last few months. I didn't want to ask too fast and then get the incorrect answers b/c i didn't look over my Unit very well or "Too-Fast" Ya know.
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Old 07-27-2019, 07:51 PM   #10
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Re: GM Truck Hydro-Boost Sealkit ?

Quote:
Originally Posted by mongocanfly View Post
Yep...you can buy rebuild kits....check pirate jacks...
Thanks, I will!
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Old 07-28-2019, 07:11 PM   #11
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Re: GM Truck Hydro-Boost Sealkit ?

I got a kit from Pirate Jack's because mine was leaking brake fluid on the floor in the cab. Fixed it right up.
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Old 07-29-2019, 05:27 PM   #12
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Re: GM Truck Hydro-Boost Sealkit ?

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I got a kit from Pirate Jack's because mine was leaking brake fluid on the floor in the cab. Fixed it right up.
So you can replace the brake rod seal? I read somewhere that you had to remove the rod to do that and the rod was crimped in place.
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Old 07-29-2019, 05:38 PM   #13
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Re: GM Truck Hydro-Boost Sealkit ?

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Originally Posted by DieselSJ View Post
So you can replace the brake rod seal? I read somewhere that you had to remove the rod to do that and the rod was crimped in place.
There's two styles. The older ones secured the rod with a rubber grommet. The newer ones crimped(staked) the rod in place. Instructions say to pull the grommet type out for repair, and to cut/reweld the staked rod when repairing. I cut and welded my staked rod.

After I did that, I ran across info saying that the staked rod could be pulled out as well. It just takes a lot more force, and some fabrication to make a puller. Restaking it is easy enough, it seems. Just use a small punch to crimp some metal back around the ball end of the shaft.

With a staked rod, it's going to require some metal work either way. If you have handy access to a welder, it's probably just as easy to cut and reweld.
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Last edited by kipps; 07-29-2019 at 05:53 PM.
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Old 07-30-2019, 12:54 PM   #14
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Re: GM Truck Hydro-Boost Sealkit ?

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Originally Posted by DieselSJ View Post
So you can replace the brake rod seal? I read somewhere that you had to remove the rod to do that and the rod was crimped in place.
I was able to pop the rod out of mine and put it back it (maybe not recommended but I dont see how its going to fall out when reattached to the pedal).

I did this on my '75 which seems to have all kinds of weird slightly different quirky parts that dont seem to apply to most squarebodys.
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Old 07-30-2019, 01:25 PM   #15
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Re: GM Truck Hydro-Boost Sealkit ?

Thanks guys.
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Old 09-14-2019, 11:50 AM   #16
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Re: GM Truck Hydro-Boost Sealkit ?

Found this thread and thank everyone for all the information. Just replaced all my power steering components and now I sprung a leak (I imagine the system was not operating at such a high efficiency previously and now it blew a seal).

Ordered the kit and am installing it this week.
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Old 09-16-2019, 05:10 AM   #17
82Diesel
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Re: GM Truck Hydro-Boost Sealkit ?

Quote:
Originally Posted by focusedontheprize View Post
Found this thread and thank everyone for all the information. Just replaced all my power steering components and now I sprung a leak (I imagine the system was not operating at such a high efficiency previously and now it blew a seal).

Ordered the kit and am installing it this week.
Dang, That sucks! I guess now i'll look online for a gasket kit for my P/S. I hope they sell one for my engine! (6.2L diesel) everythings getting obsolete these days for this engine...
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Old 09-16-2019, 06:35 AM   #18
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Re: GM Truck Hydro-Boost Sealkit ?

Mine seems to have healed itself....

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Old 09-16-2019, 04:10 PM   #19
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Re: GM Truck Hydro-Boost Sealkit ?

Rebuilt mine finally. The kit was very easy to install. When I got it apart I noticed that the big main seal wasn't centered, and my piston has some very light scoring where it was contacting the bore. But pulled it apart and cleaned it all and replaced everything except the input seal. It works way better than it did...I do believe the rebuilder also missed hooking up the smaller piston correctly. I still have the slightest weep out the hole on the bottom between the master and the booster, but it is 95% better than it was.
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