Secondary valve shaft seal removal? - ZR-1 Net Registry Forums

Subfixer · 01-03-2022

Looking for advice as to how to remove the secondary valve shaft seals from the heads.
I can't figure out how to get behind them to drive/pry them out.
Thanks.

spork2367 · 01-04-2022

I used a a heavy pick tool.

Subfixer · 01-05-2022

I tried using a scribe to get between the head and the seal. Broke 2 of them. Really trying to not damage the aluminum in the bore.
I need a sharper/harder tool.....

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Paul Workman · 01-06-2022

I fashioned a make-shift puller. With an 8-point socket just big enough to span the bearing, a bolt through a fender washer and socket and the bearing with a nut threaded on the end (back of the bearing), and another nut on top of the fender washer. I screwed down the nut against the washer. The bolt pulled the bearings out - easy peasy!

Then I pressed in a Dorman freeze plug with a little JB Weld to seal the hole. If I still have the little rig, I'll snap a pic and post it. - Pretty simple tho - a #6 machine screw about 2-1/2" long, a socket, a fender washer, & a couple of nuts.

Subfixer · 01-06-2022

Getting the Shaft and bearing out was the easy part.
Getting the seal behind the bearing out is where I'm at. (Unless I misunderstood your explanation)

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Jagdpanzer · 01-06-2022

They will pry out with a flat blade screwdriver. Forget about trying to save the lip seal though.

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1991 Corvette ZR-1 · 01-07-2022

Did you remove all the bearings? Curious if you have any pictures of the process. I am looking to do this in a few months.

01-03-2022	#1
Subfixer Join Date: Sep 2018 Location: Groton, CT Posts: 371	Secondary valve shaft seal removal? Looking for advice as to how to remove the secondary valve shaft seals from the heads. I can't figure out how to get behind them to drive/pry them out. Thanks. __________________ 1992 ZR1 #442, 2 tops, White, White, Haibeck 415, 3.90 gear, Coilovers 2018 Audi RS5, 2.9 V6 Twin Turbo, Auto, Black, Black 2021 Audi Q3, 2.0T, 8 spd Tiptronic, Navarro Blue metallic, Pearl Beige

01-04-2022	#2
spork2367 Join Date: Jun 2013 Location: PA Posts: 879	Re: Secondary valve shaft seal removal? I used a a heavy pick tool.

01-05-2022	#3
Subfixer Join Date: Sep 2018 Location: Groton, CT Posts: 371	Re: Secondary valve shaft seal removal? I tried using a scribe to get between the head and the seal. Broke 2 of them. Really trying to not damage the aluminum in the bore. I need a sharper/harder tool..... Sent from my Pixel 4a (5G) using ZR-1 Net Registry mobile app __________________ 1992 ZR1 #442, 2 tops, White, White, Haibeck 415, 3.90 gear, Coilovers 2018 Audi RS5, 2.9 V6 Twin Turbo, Auto, Black, Black 2021 Audi Q3, 2.0T, 8 spd Tiptronic, Navarro Blue metallic, Pearl Beige

01-06-2022	#4
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,493	Re: Secondary valve shaft seal removal? I fashioned a make-shift puller. With an 8-point socket just big enough to span the bearing, a bolt through a fender washer and socket and the bearing with a nut threaded on the end (back of the bearing), and another nut on top of the fender washer. I screwed down the nut against the washer. The bolt pulled the bearings out - easy peasy! Then I pressed in a Dorman freeze plug with a little JB Weld to seal the hole. If I still have the little rig, I'll snap a pic and post it. - Pretty simple tho - a #6 machine screw about 2-1/2" long, a socket, a fender washer, & a couple of nuts. __________________ Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry

01-06-2022	#5
Subfixer Join Date: Sep 2018 Location: Groton, CT Posts: 371	Re: Secondary valve shaft seal removal? Getting the Shaft and bearing out was the easy part. Getting the seal behind the bearing out is where I'm at. (Unless I misunderstood your explanation) Sent from my Pixel 4a (5G) using ZR-1 Net Registry mobile app __________________ 1992 ZR1 #442, 2 tops, White, White, Haibeck 415, 3.90 gear, Coilovers 2018 Audi RS5, 2.9 V6 Twin Turbo, Auto, Black, Black 2021 Audi Q3, 2.0T, 8 spd Tiptronic, Navarro Blue metallic, Pearl Beige

01-06-2022	#6
Jagdpanzer Join Date: Apr 2007 Location: Northern VA Posts: 2,650	Re: Secondary valve shaft seal removal? They will pry out with a flat blade screwdriver. Forget about trying to save the lip seal though. Sent from my iPhone using ZR-1 Net Registry __________________ Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake

01-07-2022	#7
1991 Corvette ZR-1 Join Date: Sep 2018 Location: Florida Posts: 301	Re: Secondary valve shaft seal removal? Did you remove all the bearings? Curious if you have any pictures of the process. I am looking to do this in a few months.