TB removal and then some!!!

[Roadster]

Originally Posted by carter200

Tom,
You have yet another PM....


Cliff,
Thanks for the kudos

Carter,
Another PM answered.....

Originally Posted by HAWAIIZR-1

Thanks for sharing all these details and nice photos Tom! I have been having some idle issues since I got this 95, but time to address it. I have this NIB TB and might as well put it to use instead of on the shelf for the last 14 years or so.

Craig that TB looks great, now only if I could persuade you to let it go for some Philly Cheesesteaks & Hoagies and $$$.....lol just had to try!!!

Just going to take my time and get this idle issue fixed. A learning experience for sure. Also will wait and see what the results are with mine before thinking about sending the TB out to Marc for a check-up.

Glad you enjoy the pics, I enjoy taking them!!!
Keep us posted on your progress too...

Originally Posted by XfireZ51

Marc offers a very simple coolant bypass solution utilizing a bent aluminum fuel line that passes under the plenum and connects the throttle body coolant hoses to each other.
The solution I have seals the coolant passages at the injector housing (both sides) and includes a small valve to bleed the coolant system.

I did see that before, elaborate more on your solution when time permits...
I guess my concerns are winter driving, (which I don't use the Z that much), so not a concern....lol The other one is air being trapped in the system....and I assume your bleeder valve would solve that problem. I know there are a lot of members to have done the bypass in different ways, so it is something to be considered.

[A1990]

Tim I had the exact same symptoms you describe. I sent my TB to Marc for his repair

Had my TB back in two days...problem solved


Sent from my iPhone using ZR-1 Net Registry

[XfireZ51]

Tom,

Here's one way to eliminate coolant flow. Different than mine.

https://www.corvetteforum.com/forums...post1581460754

You might also ask Marc for the "helper spring" he sells for the TB. That may be enough in your situation.

[Roadster]

Dennis, I'm already in this far, so the plenum will come off. Then will check for vacuum leaks and see if any hoses popped off.
TB is last resort.....

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[Roadster]

Originally Posted by XfireZ51

Tom,

Here's one way to eliminate coolant flow. Different than mine.

https://www.corvetteforum.com/forums...post1581460754

You might also ask Marc for the "helper spring" he sells for the TB. That may be enough in your situation.

Dom, will give it some thought, I'm still not feeling too comfy to attempt this mod...
Thanks for the link, and the info for the "helper spring". Will contact Marc.

[Roadster]

Latest update.....success!!!!
After I used my 5 lb sledge and crow bar, removal was easy peasy....lol
Having a cold one in celebration of my first plenum pull myself.....woohoo!!!

Used a hand siphon for the antifreeze, what a treat that was....I won't go into detail and yes it makes for the case to do the TB coolant bypass....

Just looking at everything at a quick glance, all seems fine. The one thing I was concerned about was when I pulled the plenum up the "curly" line (I imagine a PCV line) came out of its connector. But I can't tell you if it was already out or not. Will check more within the net few days. A lot going on, even with the 74, can't loose sight of that project...

All-in-all, everything went well so far!!!
Looks like I'll continue to freshen up parts as time goes on. Now is a good time to repaint the plenum. And maybe even more....

Here are some pics and a question or two.....
Another "famous" block(s) of wood....lol...they come in handy!!!


You may be able to see some of the connectors that need to be undone before plenum removal....the crow bar really comes in handy here....I didn't really say that, did I??? just kidding, must be the brew.....
IIRC, there must be 5-6 connections that need to be unplugged and one unbolted. Take your time when doing these, as patience is a must...
Again, directed to those who may want to attempt this for the first time...

[Roadster]

One of the also "famous" curly lines under the plenum. This one came out of its connector when I pulled up on the plenum. Did it pop out before, that I can't tell you.....

I imagine this is the PCV "pig tail" that Yun has referred too on numerous occasions. Have to see if this can be replaced, just to be sure....

not tapped....

tapped, no foreign objects allowed here....

had enough for the night....lol the LT5 is feeling nice and cozy all covered...

[A26B]

Looks like the old original plenum gaskets were re-used when the plenum was pulled last. I'm not a fan of re-using gaskets, they're not that expensive compared to the problem of chasing vacuum leaks.

[Roadster]

Originally Posted by A26B

Looks like the old original plenum gaskets were re-used when the plenum was pulled last. I'm not a fan of re-using gaskets, they're not that expensive compared to the problem of chasing vacuum leaks.

Yes they were....I have a set of thin gaskets, but may just order the thicker ones, plus a few other items....
Do you carry the part where the hoses connect into??? the bottom hole in the connector is the "curly" line connected to the LSF of the plenum.

[carter200]

You need my billet EGR plate to replace that nasty black piece you have there......