Throttle Body Primary Blade Wear Issue

[Jagdpanzer]

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]

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]

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]

DAG

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

Don't remove it!

[Jagdpanzer]

When used, dag is applied only to the secondaries.



Sent from my iPhone using ZR-1 Net Registry

[Hog]

Originally Posted by Jagdpanzer

When used, dag is applied only to the secondaries.



Sent from my iPhone using ZR-1 Net Registry

As in the 2 larger throttles in the t-body, or DAG is only used on the Port Throttles?

[Jagdpanzer]

Yes, the 2 larger throttle bores in the t-body

[Hog]

Originally Posted by Jagdpanzer

Yes, the 2 larger throttle bores in the t-body

OK cool.


Just an illustration of the confusion which can occur when referencing LT5 parts as "secondary or secondaries is often used in reference to the Port Throttles.


I just saw a gentleman who is sell DAG-213 for $15.00. He said the quantity sold for $15.00 would be enough to do a few sets of throttleblades. He states that suppliers sell this product in large quantities, like over $500 per gallon and that it has a shelf-life of 24 months from time of manufacture. He suggest using the $15 tube amount that he sells within 30 days, and keep it in the refrigerator to help lengthen its useful life.


Here's his link, sounds like he's a carb rebuilder
http://www.pontiactripower.com/shop/...ade-sealer-dag









Or 5 gallons for $1550 down to 30ml for $25.95
http://www.laddresearch.com/chemicals/dag-213

[Jagdpanzer]

Over the years I've looked over several TBs and only one had DAG applied to the secondary throttle blades. This leads me to speculate DAG was applied during the factory dyno test if acceptable idle behavior could not be achieved otherwise.

[S.hafsmo]

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