Throttle Body Primary Blade Wear Issue - ZR-1 Net Registry Forums

Jagdpanzer · 05-09-2017

In the process of rehabbing a high mileage (120K) TB I acquired a while back.
Found the primary throttle blade worn down significantly on one side due to side forces coming from worn actuator cam follower.

Before removing the throttle blade screws I used a Dermal with a small cut-off disk
to grind off the retainer welds on the back side so not to ruin the throttle shaft threads.

S.hafsmo · 05-09-2017

Quote:

Originally Posted by Jagdpanzer

Is all that really worn off? Is there no notch on other side of the disk?
Remarkable. Makes sense one would have idle issues if the primary looks like that.

Roadster · 05-09-2017

What mine looks like at almost 70,000 miles.....not sure what the substance is on the edge of the blade and around the screw. Need to do a closer inspection, but that is probably the last thing I will do, wait til after the plenum is reinstalled....

tf95ZR1 · 05-09-2017

DAG

http://www.pontiactripower.com/shop/...ade-sealer-dag

Don't remove it!

Jagdpanzer · 05-09-2017

When used, dag is applied only to the secondaries.

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S.hafsmo · 05-10-2017

Phil,
If you've still got the throttlebody in your hands, could you take a pic of it underside, where the makers logo is?

Jagdpanzer · 05-10-2017

Here you go

S.hafsmo · 05-10-2017

Thanks!

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secondchance · 05-10-2017

Quote:

Originally Posted by Jagdpanzer

In the process of rehabbing a high mileage (120K) TB I acquired a while back.

Looks like you found it!
Are you planning on replacing the throttle plate? With new one cut to original size?

Jagdpanzer · 05-10-2017

Doubt if there are any OE spares around. Could fab up a 10 degree angle mandrel and turn out a few new ones on the lathe. A good project for next winter.

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05-09-2017	#1
Jagdpanzer Join Date: Apr 2007 Location: Northern VA Posts: 2,657	Throttle Body Primary Blade Wear Issue In the process of rehabbing a high mileage (120K) TB I acquired a while back. Found the primary throttle blade worn down significantly on one side due to side forces coming from worn actuator cam follower. Before removing the throttle blade screws I used a Dermal with a small cut-off disk to grind off the retainer welds on the back side so not to ruin the throttle shaft threads. __________________ Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake

05-09-2017	#3
Roadster Join Date: Mar 2014 Location: Warrington PA Posts: 1,913	Re: Throttle Body Primary Blade Wear Issue What mine looks like at almost 70,000 miles.....not sure what the substance is on the edge of the blade and around the screw. Need to do a closer inspection, but that is probably the last thing I will do, wait til after the plenum is reinstalled.... __________________ Tom 1994 ZR-1 #009 "captured test fleet car" 1974 LS4 454 Vert 1982 L83 CFI...now a retired "dd"....Sold WAZOO Member

05-09-2017	#4
tf95ZR1 Join Date: Aug 2005 Location: Northridge, CA Posts: 1,457	Re: Throttle Body Primary Blade Wear Issue DAG http://www.pontiactripower.com/shop/...ade-sealer-dag Don't remove it! Last edited by tf95ZR1; 05-09-2017 at 10:23 PM. Reason: Wanted 2

05-09-2017	#5
Jagdpanzer Join Date: Apr 2007 Location: Northern VA Posts: 2,657	Re: Throttle Body Primary Blade Wear Issue When used, dag is applied only to the secondaries. Sent from my iPhone using ZR-1 Net Registry __________________ Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake

05-10-2017	#6
S.hafsmo Join Date: Nov 2016 Location: Norway Posts: 397	Re: Throttle Body Primary Blade Wear Issue Phil, If you've still got the throttlebody in your hands, could you take a pic of it underside, where the makers logo is? __________________ - '90 ZR-1