1999 K2500 Suburban - Hydroboost leaking, replace or upgrade?

[stutaeng]

Here's the procedure I followed when I replaced my unit on my K3500. It's a GMT 800, but everything else still applies:

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[Frank Enstein]

Frank's leaky hydroboost healed itself. This can't be good.

 

[TexasAggie]

I'm going to try and replace the seals before replacing. A full rebuild kit is $20 and a rebuilt unit is anywhere between $180 and $350. It looks like it may be possible to replace the seals without taking it off the truck (you just have to separate the halves and pull the piston out), but not sure how easy/hard that will be with the access issues. Since I have to pull it out anyway to replace, I may as well see if I can fix it for a fraction of the cost.

 

[Supercharged111]

Frank's leaky hydroboost healed itself. This can't be good.

That just means you have a month or 2 and it'll be back. I tried cheating with some Lucas on mine and it worked! Until the truck sat for 2 weeks, leak was back as bad as ever.

 

[castine917]

I'm going to try and replace the seals before replacing. A full rebuild kit is $20 and a rebuilt unit is anywhere between $180 and $350. It looks like it may be possible to replace the seals without taking it off the truck (you just have to separate the halves and pull the piston out), but not sure how easy/hard that will be with the access issues. Since I have to pull it out anyway to replace, I may as well see if I can fix it for a fraction of the cost.

I just did the seal replacement myself. The seals on Amazon/ateam performance were too soft and kept ripping on me. The ones from pirate were slightly stronger and held up better.

Access issues aren’t too bad. I didn’t do anything in the area of the pedals. All under the hood.

 

[Supercharged111]

I just did the seal replacement myself. The seals on Amazon/ateam performance were too soft and kept ripping on me. The ones from pirate were slightly stronger and held up better.

Access issues aren’t too bad. I didn’t do anything in the area of the pedals. All under the hood.

Can you post a link to the pirate seals? I tore an a team seal putting mine together. I also found this thread, says Elder Rubber makes the one seal that always leaks.

hydro-boost seals found

I don't want to step on Vanco's toes, but after an extensive search, I finally found a source for the input and output shaft seals for my hydro-boost. It came off of a late 70's GMC 1-ton, but as far as I can tell all the GM units look about the same. Anyway the place is called Elder Rubber...

www.binderplanet.com

Here they are, haven't emailed them yet. Supposedly you have to buy like 25 of them, but they're dirt cheap.

Elder Rubber Company | Rubber Molding

<p>Elder Rubber Company is a renowned provider of high-quality rubber molding products and services. With decades of experience in the industry, we have esta...

www.rubbermolding.org

 

[stutaeng]

Can you post a link to the pirate seals? I tore an a team seal putting mine together. I also found this thread, says Elder Rubber makes the one seal that always leaks.

hydro-boost seals found

I don't want to step on Vanco's toes, but after an extensive search, I finally found a source for the input and output shaft seals for my hydro-boost. It came off of a late 70's GMC 1-ton, but as far as I can tell all the GM units look about the same. Anyway the place is called Elder Rubber...

www.binderplanet.com

Here they are, haven't emailed them yet. Supposedly you have to buy like 25 of them, but they're dirt cheap.

Elder Rubber Company | Rubber Molding

<p>Elder Rubber Company is a renowned provider of high-quality rubber molding products and services. With decades of experience in the industry, we have esta...

www.rubbermolding.org

That company is local to me! My 04 project suburban has a hydroboost that seeps. I hope they are the same seal...

$10 worth of seals + shipping sure beats $250+ for a remanufactured hydroboost.

I also just remembered there's a company in Mesquite, Texas that apparently rebuilds the hydroboost for one of the big companies. I can't remember the name though.

 

[castine917]

Kit 50 (2771004X) Hydro-Boost Repair Kit- UNIVERSAL RUBBER SEAL KIT ONLY- GM, FORD, MOPAR

Shop Pirate Jack for disc brake conversion kits, master cylinders, brake boosters and much more. We carry parts for Fords and GM made vehicles.

piratejack.net

This is the seal kit. Wish they offered just the one seal as this did cost more and had more than I needed. They also offer a bigger kit with more parts if you want to rebuild farther.

 

[castine917]

You must be registered for see images attach

Here is one of my ateam(on right) seals next to my prior seal(on left). The prior seal had a crack in the groove. The a team seal was so soft that it swelled up almost immediately on both the first and second kit I bought. They were the same size before installation.

 

[Supercharged111]

That company is local to me! My 04 project suburban has a hydroboost that seeps. I hope they are the same seal...

$10 worth of seals + shipping sure beats $250+ for a remanufactured hydroboost.

I also just remembered there's a company in Mesquite, Texas that apparently rebuilds the hydroboost for one of the big companies. I can't remember the name though.

I had to get my reman in CA, it was $400!