'86 C10 Rats Nest under hood ??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

*1FaastC10* · 04-01-2003, 09:30 PM

i just bought this '86 C10, and its got that wonderful little "power"house 5.0 in it. along with it, came literally a rats nest on top of the intake, inside all of those wonderful little vaccuum lines, and AIR lines. how much of this stuff can i take off and still have functional cruise control and air conditioning? i'd like to see that there is actually an engine in there, and not just a big bundle of wires.

crosschecker · 04-01-2003, 09:42 PM

I have an 86 with a 305 under the hood myself. I know what your talking about when you say rats nest. The old vacuum lines get brittle and break, leaving you to wonder why your engine is all of a sudden running like crap. I currently have parts on order from Summit to take care of all that.
Check out www.geocities.com/gmc86pu

Ol' Grey · 04-01-2003, 10:08 PM

I'm in the process of getting rid of some stuff under the hood. EGR has been blocked off and the air pump is gone. I haven't even begun to decifer the vacuum line "map" to see what can get plugged, tossed, or rerouted. It would be nice to see a how-to on this. Lemme go google it.

*1FaastC10* · 04-01-2003, 10:42 PM

heh, looks like i should've titled this thread "Rats NestS" since there are so many of us.

crosschecker · 04-01-2003, 10:52 PM

What us usually the stock rear end gears for an 86 1/2 ton with a 305?

*1FaastC10* · 04-01-2003, 10:56 PM

2.73s and 3.08s are most common behind a 700R4. i might be able to get ahold of the stock 3.08 from my '82 C10 for my '86. that ought to be a little improvement for me.

*mike reeh* · 04-01-2003, 11:00 PM

rats nest? it has a 305? sounds more like a mouse's nest.

mike

crosschecker · 04-01-2003, 11:01 PM

My truck originally came with a turbo 350, but the previous owner droped a 400 in it with a shift kit in anticipation of putting a 350 under the hood.
Im always leery of that tranny, I dont know why. Ive had it checked out at a shop and they say its fine. Im thinking of 3.73 rear end, but dont want to give up any gas mileage.

gmc7286chevy · 04-02-2003, 12:12 AM

I also have an 86 chevy that had the same nest. The AIR pump was locked up. I removed all the AIR hoses and unnecessary vacuum lines. I put on an aluminum intake and new carb. It now has headers and duals and runs a lot better.

CRRoy71 · 04-02-2003, 12:18 AM

Quote:

Originally posted by gmc7286chevy
I also have an 86 chevy that had the same nest. The AIR pump was locked up. I removed all the AIR hoses and unnecessary vacuum lines. I put on an aluminum intake and new carb. It now has headers and duals and runs a lot better.

Have any problems getting it inspected?

I also have the '86 nest, and I am trying to figure out what I can remove.

gmc7286chevy · 04-02-2003, 12:43 AM

We have no inspection here so I don't have to worry about what I remove. One of these days I expect we will have to start though.

CRRoy71 · 04-02-2003, 01:05 AM

When you say you have no inspection, do you mean you don't have to have any type of inspection, ie.... lights, horn, blinkers, inspection sticker. Or do you mean you do not have to have it smog tested?

Where I live, I have to have the lights, horn, and all of that checked, but not emissions (smog) tests.
I am not real sure if they will look under the hood of a vehicle this old.

*1FaastC10* · 04-02-2003, 01:26 AM

Quote:

Originally posted by mike reeh
rats nest? it has a 305? sounds more like a mouse's nest.

mike

har har... i wish it was a "Rat's" nest, and SWB too. but for $500 who can complain? the truck still runs and drives like new, air and cruise both work. couldnt believe i found this thing like i did. 1 owner truck, with 114,000 mi on it.

crosschecker · 04-02-2003, 07:47 AM

In Oklahoma they dont inspect anything. They used to inspect for safety stuff only but people got pissed off about it, and voted it out. So I can do anything I like to engine and emissions

Slonaker · 04-02-2003, 01:47 PM

I have an '86 with a 305 also. What a mess under the hood.

We currently just have a safety inspection here in San Antonio, but they will probably start emission testing here soon. They are already doing it in Houston and Dallas.

A lot of the emissions stuff has been removed from my truck, so this worries me. I'm afraid I will have to put it all back on. I did not remove it, so I really don't know what I am missing.

If amnyone wants to get rid of their '86 AIR pump, brackets, and the exhaust manifold tubing, I'll pay postage!

Slonaker

04-01-2003, 09:30 PM	#1
1FaastC10 Account Suspended Join Date: Oct 2002 Location: Elkhart, IN Posts: 6,399	'86 C10 Rats Nest under hood ??? i just bought this '86 C10, and its got that wonderful little "power"house 5.0 in it. along with it, came literally a rats nest on top of the intake, inside all of those wonderful little vaccuum lines, and AIR lines. how much of this stuff can i take off and still have functional cruise control and air conditioning? i'd like to see that there is actually an engine in there, and not just a big bundle of wires.

04-01-2003, 09:42 PM	#2
crosschecker Registered User Join Date: Mar 2003 Location: Edmond OK Posts: 8	I have an 86 with a 305 under the hood myself. I know what your talking about when you say rats nest. The old vacuum lines get brittle and break, leaving you to wonder why your engine is all of a sudden running like crap. I currently have parts on order from Summit to take care of all that. Check out www.geocities.com/gmc86pu __________________ www.geocities.com/gmc86pu 86 C10 305 GM Goodwrench/Vortec heads

04-01-2003, 10:08 PM	#3
Ol' Grey A work in progress Join Date: Mar 2003 Location: Marion, NC Posts: 104	I'm in the process of getting rid of some stuff under the hood. EGR has been blocked off and the air pump is gone. I haven't even begun to decifer the vacuum line "map" to see what can get plugged, tossed, or rerouted. It would be nice to see a how-to on this. Lemme go google it. __________________ Marc Cook 1986 Chevy Silverado C-10 LWB Gunmetal Grey Metallic 5.0L HO, 700-R4, '73 12-bolt rear Long tube headers, 2.5" dual exhaust dumped before the axle. 1988 GMC Sierra SLE 4WD 5.7L, 700-R4, stock everything 6000LB winch

04-01-2003, 10:52 PM	#5
crosschecker Registered User Join Date: Mar 2003 Location: Edmond OK Posts: 8	What us usually the stock rear end gears for an 86 1/2 ton with a 305? __________________ www.geocities.com/gmc86pu 86 C10 305 GM Goodwrench/Vortec heads

04-01-2003, 11:01 PM	#8
crosschecker Registered User Join Date: Mar 2003 Location: Edmond OK Posts: 8	My truck originally came with a turbo 350, but the previous owner droped a 400 in it with a shift kit in anticipation of putting a 350 under the hood. Im always leery of that tranny, I dont know why. Ive had it checked out at a shop and they say its fine. Im thinking of 3.73 rear end, but dont want to give up any gas mileage. __________________ www.geocities.com/gmc86pu 86 C10 305 GM Goodwrench/Vortec heads

04-01-2003, 10:42 PM	#4
1FaastC10 Account Suspended Join Date: Oct 2002 Location: Elkhart, IN Posts: 6,399	heh, looks like i should've titled this thread "Rats NestS" since there are so many of us.

04-01-2003, 10:56 PM	#6
1FaastC10 Account Suspended Join Date: Oct 2002 Location: Elkhart, IN Posts: 6,399	2.73s and 3.08s are most common behind a 700R4. i might be able to get ahold of the stock 3.08 from my '82 C10 for my '86. that ought to be a little improvement for me.

04-01-2003, 11:00 PM	#7
mike reeh 5 day ban, learn to behave. Join Date: Nov 2002 Location: san diego, ca Posts: 683	rats nest? it has a 305? sounds more like a mouse's nest. mike

04-02-2003, 12:12 AM	#9
gmc7286chevy Registered User Join Date: Mar 2003 Location: Dyersburg, TN Posts: 66	I also have an 86 chevy that had the same nest. The AIR pump was locked up. I removed all the AIR hoses and unnecessary vacuum lines. I put on an aluminum intake and new carb. It now has headers and duals and runs a lot better.

04-02-2003, 12:43 AM	#11
gmc7286chevy Registered User Join Date: Mar 2003 Location: Dyersburg, TN Posts: 66	We have no inspection here so I don't have to worry about what I remove. One of these days I expect we will have to start though.

04-02-2003, 01:05 AM	#12
CRRoy71 Registered User Join Date: Feb 2003 Location: Mont Belvieu, TX Posts: 852	When you say you have no inspection, do you mean you don't have to have any type of inspection, ie.... lights, horn, blinkers, inspection sticker. Or do you mean you do not have to have it smog tested? Where I live, I have to have the lights, horn, and all of that checked, but not emissions (smog) tests. I am not real sure if they will look under the hood of a vehicle this old. __________________ Chris '92 ext. cab s/b 4.3L "Sparky" '04 crew cab 2500 4x4 6.0L

04-02-2003, 07:47 AM	#14
crosschecker Registered User Join Date: Mar 2003 Location: Edmond OK Posts: 8	In Oklahoma they dont inspect anything. They used to inspect for safety stuff only but people got pissed off about it, and voted it out. So I can do anything I like to engine and emissions __________________ www.geocities.com/gmc86pu 86 C10 305 GM Goodwrench/Vortec heads

04-02-2003, 01:47 PM	#15
Slonaker Insert Witty Text Here Join Date: Oct 2002 Location: San Antonio, TX Posts: 3,415	I have an '86 with a 305 also. What a mess under the hood. We currently just have a safety inspection here in San Antonio, but they will probably start emission testing here soon. They are already doing it in Houston and Dallas. A lot of the emissions stuff has been removed from my truck, so this worries me. I'm afraid I will have to put it all back on. I did not remove it, so I really don't know what I am missing. If amnyone wants to get rid of their '86 AIR pump, brackets, and the exhaust manifold tubing, I'll pay postage! Slonaker __________________ '86 Chevy C10 (Sold 04/19/13 ) Stock '01 Silverado



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