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

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Old Apr 26, 2018 | 03:14 PM
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my daughter-in law just dumped 1987 corvette in my lap.Where can I find a good manual to show a routing of vacuum lines? Also is there a place that sells both hard and soft vacuum line complete kits or some parts for intake and injector?
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Old Apr 26, 2018 | 03:34 PM
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The factory service manuals are your best bet. Ebay has them for sale most of the time and sometimes here on the forum in the C4 parts for sale section.

I do not know of any vendor who sells a vacuum line kit.

Good luck getting you car fixed.

Welcome to the forum.
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Old Apr 26, 2018 | 04:44 PM
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Thank you for your quick response I will pursue these options
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Old Apr 26, 2018 | 10:02 PM
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Someone posted a pdf download of the '87 service manuals here a couple times. I'd try a search.
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Old Apr 27, 2018 | 01:05 AM
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Originally Posted by jv9999
Someone posted a pdf download of the '87 service manuals here a couple times. I'd try a search.
I do a search on this site any pointers thanks in advance
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Old Apr 27, 2018 | 08:43 AM
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Originally Posted by N2NITRO
I do a search on this site any pointers thanks in advance
The search within the site is not good, but using Google I found this.
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Old Apr 27, 2018 | 09:13 AM
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Welcome to the forum, Grats on your project. In no time you'll driving. Lots of very knowledgeable C4 guys here.

You may want to post your area maybe someone in that area will be willing to help.

Last edited by FASTAZU; Apr 27, 2018 at 09:14 AM.
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Old Apr 27, 2018 | 09:35 AM
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I was looking for the vacuum line kit as well. Can't find anyone who sells it.
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Old Apr 27, 2018 | 09:41 AM
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Originally Posted by fredk
I was looking for the vacuum line kit as well. Can't find anyone who sells it.
You may have to buy the soft lines and rebuild it a piece at a time.
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Old Apr 27, 2018 | 12:45 PM
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The chain auto parts stores will have lengths of rubber vacuum line in various diameters as well as flexible plastic (hard) lines. The "HELP" brand of these items should be enough to get you started on line replacement. HELP also has a variety of vacuum line fittings that will probably be needed for the rebuild.

For a "good manual" you need to get the Factory Service Manual (FSM) set for your year of Corvette. These will usually show up from time to time in the C4 Parts For Sale section of the forum and they can also be found on eBay. These year-specific books are the same ones that were used by the service techs at Chevy dealerships.
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Old Apr 27, 2018 | 02:14 PM
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Originally Posted by N2NITRO
my daughter-in law just dumped 1987 corvette in my lap.Where can I find a good manual to show a routing of vacuum lines? Also is there a place that sells both hard and soft vacuum line complete kits or some parts for intake and injector?
You must really like your daughter in law...

Just buy the lines locally and replace every single one of them. If you don't you'll be back again doing the same thing. They get hard and brittle after 30 years of heat cycles. The egr vacuum lines run under the plenum, are you pulling it?
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Old Apr 27, 2018 | 04:26 PM
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Basket yes I'm going to change everything from the e g r valve up all hardlines and softlines what PDF should I download for a 87 that'll give me all the ports and locations for all the lines
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Old Apr 27, 2018 | 05:48 PM
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welcome....lots of good help here. Get a fsm from ebay...you'll be needing a hard copy for the pictures....greats cars but, you'll know all about it before it's over.....seeing the state you're in, you'll be needing to keep it stock......good luck
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Old Apr 30, 2018 | 12:55 PM
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One at a time, do not trust your memory!
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Old May 1, 2018 | 10:28 AM
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The hard part is finding new tubing that's not the huge, hideous stuff.

I finally found Dorman tubing that works, check the size. The flexibility of this stuff does point to how brittle the old tubing has become.

https://www.dormanproducts.com/c-56-hose-tubing.aspx

Oreilly had this in their "emissions" area.
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