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

L98 Air tubes and Hoses nightmare identifying them....HELP !!! Pics included !!!

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Old 04-16-2008, 12:20 AM
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Calderone
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Default L98 Air tubes and Hoses nightmare identifying them....HELP !!! Pics included !!!

Hi all
Me again,trying to get this done.-
I am doubtful with some of the wires and hoses and tubes ...
Any light here will help me a lot to make it run again.

Here i have some pics ..i hope some of you can help me thanks !

Is this on the correct position ?


I found 2 blocked hoses.....what's their function?


Tube


Tube


Tube


Pcv to where ? where is this connected?


where ...tube ??????


rare tube with something like a filter ...


Hose ...looks like it comes from the power brakes and goes....
but not sure ..


what's this ?



what does connect to this intake fitting ?


same


small hose


thanks !
Old 04-16-2008, 01:00 AM
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johnnyevans
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Pic 1 - looks correct if the electrical connectors are at 6 o'clock on the front.
Pic 2 - left tube pointed up and forward looks like air tube to cat. Other tube ?
Pic 3 - looks like air tube to air tube that run to cat.
Pic 4 - looks like crossover air tube from left to right banks.
Pic 5 - looks like vacuum hose that hooks up to underside of TB, goes to drivers side to
vacuum hose to charcoal cannister control valvc.
Pic 6 - No idea
Pic 7 - No idea
Pic 8 - Looks like filter for air diverter, goes in front of engine with Pic 4
Pic 9 - No idea
Pic 10 - Looks like filter capacitor, possibly tach filter
Pic 11 - Hot water tube for heater supply hose
Pic 12 - Same as 11
Pic 13 - Looks like water hose to bottom of TB.

Should get you in the ballpark, this is all from memory, I can check FSM tomorrow and see.
Johnny
Old 04-16-2008, 01:05 AM
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Calderone
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thanks !!!
Old 04-16-2008, 03:57 AM
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rodj
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6 and 7 are the PCV lines.

PCV valve goes in LH rocker cover grommett ( front ) with hose to fitting on intake in behind # 5 injector.
Solid line goes RH side from tube on throttle body to gromment in RH rocker cover ; rear

All the AIR system can be deleted to cleanup the engine bay.Remove everything and just cap off the two fittings on the exh manifolds

11 / 12 is the coolant air bleed from rear of intake.Can just block off

Tach filter goes on top bellhousing bolt LH side , by oil switch; one wire to plug on loom , other to dist if I remember right

You are going to take pics NEXT time aren"t you

Last edited by rodj; 04-16-2008 at 04:01 AM.
Old 04-16-2008, 06:44 AM
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Calderone
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Rod how are you !!!!! thanks ...
Yes,i didnt take any pic
that was a big mistake.-
AIR....what's the effect of blocking it ?
i really want to do it
thanks
Old 04-16-2008, 08:30 AM
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AGENT 86
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Originally Posted by Calderone
Rod how are you !!!!! thanks ...
Yes,i didnt take any pic
that was a big mistake.-
AIR....what's the effect of blocking it ?
i really want to do it
thanks
Dumping all the A.I.R. parts will cause no problems, but will clean up a lot of the crap on the front of motor.
Old 04-16-2008, 08:32 AM
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jsup
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They look just fine on the floor, leave them there.
Old 04-16-2008, 08:40 AM
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Calderone
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Hehehe
Old 04-16-2008, 08:43 AM
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rodj
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Originally Posted by rodj
.Remove everything and just cap off the two fittings on the exh manifolds
Forgot ;
there is a 3rd S/S air line running from AIR system front of engine,
under the car to the cat convertor.Remove also and seal at cat.
Old 04-16-2008, 08:47 AM
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Calderone
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Originally Posted by rodj
Forgot ;
there is a 3rd S/S air line running from AIR system front of engine,
under the car to the cat convertor.Remove also and seal at cat.

Where is the cat connection ?
Thanks

ps : can someone post a pic of what tubes to remove / block
there are little hoses that goes everywhere under the plenum too,i dont now if this are from AIR or something....
Old 04-16-2008, 09:06 AM
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rodj
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The AIR system are all the big pipes from the air pump.
Remove everything , tuck the spare wires back into the loom somewhere.
Cap off where the hose go to the air pipes on exh manifolds. Fitting shown in pic 2.

The smaller lines under the intake supply to the EGR solenoid then to the EGR valve.
If you don't want EGR to work ,only need vac line to fuel reg and line that goes into cable loom behind dist that operate the A/c functions.
Old 04-16-2008, 09:11 AM
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Calderone
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what's the effect of a non working EGR?
Thanks Rod!
Old 04-16-2008, 09:44 AM
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rodj
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Originally Posted by Calderone
what's the effect of a non working EGR?
Thanks Rod!
It upsets some people on this forum
Old 04-16-2008, 09:46 AM
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Iroc57
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Originally Posted by jsup
They look just fine on the floor, leave them there.
Old 04-16-2008, 09:49 AM
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Calderone
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Can some of you post some FSM Scan?
my fsm its on its way..and the 86 fsm seems different
Old 04-16-2008, 10:58 AM
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Bad Karma
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Originally Posted by rodj
It upsets some people on this forum
Haha, it does indeed.


I have the EGR blocked and the air lines removed/blocked off, with no issues. The connection to the cat is a tube coming out the side of the cat. remove all the hard lines and block off the hose leading into the cat. Plumbing caps work for the exhaust manifolds.
Old 04-16-2008, 11:02 AM
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Calderone
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i love your car BK !
Do you have any pics of the blocked lines ?
i wonder why GM used AIR and all of those lines !

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To L98 Air tubes and Hoses nightmare identifying them....HELP !!! Pics included !!!

Old 04-16-2008, 01:08 PM
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Demonic85
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The connection for the cat runs underneath of the car along the passenger side and thats the line you see in front of the passenger side header. Its secured to the fender well down low by the exhaust. Its kinda hard to reach.

IMO the engine looks a lot better without all the AIR hookups, especially with headers on it now
Old 04-16-2008, 04:10 PM
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Calderone
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Originally Posted by Demonic85
The connection for the cat runs underneath of the car along the passenger side and thats the line you see in front of the passenger side header. Its secured to the fender well down low by the exhaust. Its kinda hard to reach.

IMO the engine looks a lot better without all the AIR hookups, especially with headers on it now
i was close to buy headers ....
maybe i will do it in the future
Old 04-16-2008, 06:11 PM
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steven mack
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EGR is to keep your car out of detonation and gives better gas mileage.On a scale of 1 to 10 you can only hear 1.Your knock sensor should help with detonation but will retard your timing.



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