08-25-2014 | #1 |
Join Date: Aug 2014
Location: Kansas City, MO
Posts: 838
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Pulling the Plenum for the first time...
I have had the ZR1 for a few weeks now and have driven more than I thought I would over these past few weeks. The no radio hasn't bothered me that much since I have some way of listening to tunes(phone with bluetooth speaker).
I have cleaned the grounds inside the car, but I know I need to clean the grounds on the engine block and anywhere else in the engine bay. I have been told that pulling the plenum is the right of passage to owning these cars. I'm not a noob to working on cars in general, just corvettes. I have a guy local to me who went and looked over the car with me, let me know what I should do to get the car up to snuff. Pulling the plenum is on the top of this list to me. List of things to do: -Replace Fuel Injectors(don't know if its ever been done, but Tech 1 showed a big difference between the 2 banks of the engine) -Fix some vacuum lines -Change/flush coolant -Change PCV rubber pieces -Change MAP sensor hose(mine is all rubber not the hard plastic line like stock) Is there anything I am really missing when pulling the plenum? Can I get some of these vacuum lines at the local part store? That MAP sensor hose is like $45 on Jerry's gasket. He told me to make sure I book about 8 hours to do all this work. |
08-25-2014 | #2 |
Join Date: Mar 2014
Location: Warrington PA
Posts: 1,914
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Re: Pulling the Plenum for the first time...
I will be watching this thread, as this is something I may be doing over the winter. There is a wealth of info on this forum, these guys really know the ZR-1 inside and out. I am always learnng something new on this site, and learning more about my 94 as time goes on.
Be sure to take pics along the way, as it is always good to get another look at what owners are doing to their Z's. BTW, what year is yours? And good luck!!!
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Tom 1994 ZR-1 #009 "captured test fleet car" 1974 LS4 454 Vert 1974 L-82 355 Vert. 1982 L83 CFI...now a retired "dd"....Sold WAZOO Member |
08-25-2014 | #3 |
Join Date: Aug 2014
Location: Kansas City, MO
Posts: 838
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Re: Pulling the Plenum for the first time...
My car is a 1991. White with red interior.
I figured I would post this question on here in order to have all the parts lined out before I start tearing it apart.
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Looking for a ZR-1 1985 Yamaha RZ350-NOT STOCK 1971 Yamaha AT1-Middle of a restoration |
08-25-2014 | #4 |
Join Date: Dec 2012
Location: NC
Posts: 1,786
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Re: Pulling the Plenum for the first time...
I didn't know this thing either when I started (still don't much ); but maybe put every bolt back in it's hole when the part is out of the way, which takes longer, BUT, bolts NEVER get mixed up when you do.
And, clean the parts as soon as you remove them. Dirty parts stack up REAL quick; then at re-assembly, you get rushed, and don't do as good a job as you'd have done otherwise. And no one gets mad if you post LOTS of snappics as you go
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I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG] |
08-25-2014 | #5 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,709
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Re: Pulling the Plenum for the first time...
Billy,
Just a couple of suggestions. 1. The BLM split between left and right banks is not unusual particularly at low airflow levels like idle. If you are going to swap out injectors, it should not be because of that alone. If you suspect something else fine. Also, depends on mileage. 2. If stock coils and wires then I would upgrade these. 3. You'll need to make sure you drain coolant to levels below plenum.
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
08-25-2014 | #6 |
Join Date: Aug 2006
Location: McLean, VA
Posts: 3,725
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Re: Pulling the Plenum for the first time...
When ignition is in run position how frequently and for how long does your vacuum motor run? If it stays quiet for 30 seconds or more I would say your vacuum lines are in good shape.
Also, I would have a couple of 3 way vacuum check valves handy just in case. I would check all vacuum line plastic to rubber boot connections and if they are sliding relative to the other, I would slide the hard line out about a 1/4", dab of Crazy glue, slide back in. Also, seal the rubber boot shoulder with black silicone sealant followed by a zip-tie. 'Course all that is unnecessary on my car since I pulled the whole secondary vacuum off the motor now. |
08-25-2014 | #7 | ||
Join Date: Aug 2014
Location: Kansas City, MO
Posts: 838
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Re: Pulling the Plenum for the first time...
Quote:
They appear to be stock coils, and wires. It seems to be hit or miss with changing out coils. Quote:
My vacuum pump runs every second or so. So it there are some vacuum leaks.
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Looking for a ZR-1 1985 Yamaha RZ350-NOT STOCK 1971 Yamaha AT1-Middle of a restoration |
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08-25-2014 | #8 | |
Join Date: Aug 2006
Location: McLean, VA
Posts: 3,725
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Re: Pulling the Plenum for the first time...
Quote:
http://www.amazon.com/ACDelco-15-505.../dp/B0016I0E42 |
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08-26-2014 | #9 |
Join Date: Aug 2014
Location: In my house
Posts: 103
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Re: Pulling the Plenum for the first time...
Took me 3 hours to pull the plenum off a motor last night. Anytime I do something the first time I make or have diagrams and try to follow the service manual steps.
The throttle body extension is real fun getting off when attached to the engine. 25t 1/4 ext and fish |
08-26-2014 | #10 |
Join Date: Dec 2012
Location: NC
Posts: 1,786
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Re: Pulling the Plenum for the first time...
Not necessarily vac leaks...
It could be air getting by the 2' TB butterfly (which I suppose amounts comparably to a vac leak), but not entirely the same. Cut a gasket withOUT cutting the 2' holes, to re-check idle quality. I did this, and idle was rock-steady. I'll put it back in, when I learn coding.
__________________
I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG] |
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