C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

TB R&R...

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Old Sep 20, 2004 | 06:57 PM
  #1  
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From: San Jose Pat Tillman - American Hero
Default TB R&R...

While installing my R-D Racing Camber Brace this weekend, I had the rubber intake tubing off the TB for the first time since I purchased the car last December. The car has 46k on the clock, and the TB had a decent amount of grime on the backside of the plates and inside. I wiped as much off as possible with a towel I had handy, but I certainly couldn't have got it all.

I've done the TB coolant bypass, and I'm wondering if it would be worth it to pull the TB and do a thorough cleaning? I am a little hesitant to futz with the TPS - I'd have to buy a multimeter first, of course - but if it's not all that bad, I'll give it a whirl. Is this something a novice could tackle with basic tools, or am I gonna get myself in over my head?

If you think it's do-able, what will I need besides my tools? A new TB gasket, I suppose - part number? Anything else?

Thanks in advance...

Aaron
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Old Sep 20, 2004 | 07:15 PM
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mikey whipreck
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i've been putting this off as well because of the TPS... i'm interested to hear opinions
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Old Sep 20, 2004 | 07:29 PM
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"Just Do It!" No special tools needed. Just the gasket and be careful tightening it up to do it evenly. Pull the IAC and the TPS and you can boil it out in carb cleaner if you like. Make sure to get ALL of the IAC passages clean. An inch-pound torque wrench will make the even tightening of the mounting bolts easier to monitor, but it's not needed. Depending on your year car, if the TPS is adjustable, you WILL need a DVOM. I think the chain, parts stores have them pretty economically, and you WILL be using it in the future.

RACE ON!!!
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Old Sep 21, 2004 | 02:20 AM
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Yes, it's worth while to thoroughly clean the TB.

You'll need a digital volt meter to set the TPS voltage, but I've seen them as cheaply as $10 at Ace hardware in one of the tool bins sitting in the isle where other inexpensive tools are offered.

Setting the TPS is super easy.

Just follow the advice already posted and you're home free.

Jake
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Old Sep 21, 2004 | 04:04 AM
  #5  
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Don't know about your LT4, but on my L98 there is no reason to mess with the TPS when removing the TB for cleaning.
Don't mess with it and it should be the same when you bolt the TB back on.
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Old Sep 21, 2004 | 11:21 AM
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LT4??? Regardless, the TPS and the IAC should be removed if the TB is going to be immersed in cleaner. If the TPS is non adjustable, you won't need the DVOM.

RACE ON!!!
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Old Sep 21, 2004 | 11:39 AM
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You won't need a DVOM for an LT4 as the TPS is non-adjustable.
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Old Sep 21, 2004 | 11:53 AM
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Look carefully at the gasket-I think they sell them in pairs-but only one is correct.Torque for the TB is 18#, if memory serves me right. Don't over torque.
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Old Sep 21, 2004 | 11:57 AM
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careful handling the IAC valve. don't dunk it in cleaner, and don't mess with the pintle position when it is off. (don't push/pull it.) there are mighty fine gears in there that can break easily.

you may find you will need to reset your IAC position once everything is back in place. hopefully someone will chime in with the LT4 procedure.
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Old Sep 21, 2004 | 12:07 PM
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From: San Jose Pat Tillman - American Hero
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Thanks for all the suggestions and encouragement... I may just give this a shot, but I'll probably wait until this next weekend so that my wife's car will be available should something else come up in the middle of it all.
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