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#1 |
Getting Old; Going Broke
Join Date: Apr 2010
Location: Owasso OK
Posts: 2,764
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Lets Play, what is this!
Ok, what is this in the photo that is circled? I'm really wanting to remove it.
78 K5 4x4 400 with 350 auto and 203 transfer case. I'm about to go to town removing vacuum lines and putting plugs in. I know (if it had any) the emissions were removed long ago, no AC and the cruise really has no function other than connecting the speedometer cables together (for now), no cruise switch on the column in it now. I'm putting new plugs in it and this little jewel and me are about to around and around. ![]()
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Why is every used 350 sbc out of a corvette? There's only two things that excite a man, expensive toys and real expensive toys. VEGETARIAN: That's an old Indian word meaning "I don't hunt so good." When the going gets tough, switch to power tools. |
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#2 |
Senior Member
![]() Join Date: Feb 2010
Location: Maumelle, AR
Posts: 478
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Re: Lets Play, what is this!
Youmay be better off going to the junkyard or flea bay and finding a carb and intake from 1973 and older that doesn't have all the EGR crap and other emissions related junk on it. Rebuild the carb for 50 bucks or so with a kit. Then you'll have vacuum for power brakes, PCV valve, and distributor diaphragm. Oh, the transmission modulator valve, too! All done.
Last edited by PRattenbury; 04-23-2011 at 12:48 PM. Reason: Forgot |
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#3 |
Getting Old; Going Broke
Join Date: Apr 2010
Location: Owasso OK
Posts: 2,764
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Re: Lets Play, what is this!
I have $400 in the truck, and maybe another $200 in misc items (plugs, wires, battery) and then $100 for a used column. I am not wanting to sink any more bucks in it than I have to, I can deal with plugs.
![]() I just don't want to go and remove something that is some sort of sensor or the likes that makes it run good. I am absolutely amazed at well this thing runs after putting seafoam in the intake, using B12 to clean the carb and putting new plugs in it (and two wires that fell apart). I have never had to use a 2' cheater bar to get a plug out before, guess they didn't believe in putting any antisieze on them the last time it was done. ![]()
__________________
Why is every used 350 sbc out of a corvette? There's only two things that excite a man, expensive toys and real expensive toys. VEGETARIAN: That's an old Indian word meaning "I don't hunt so good." When the going gets tough, switch to power tools. |
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#4 |
Senior Member
![]() Join Date: Feb 2010
Location: Maumelle, AR
Posts: 478
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Re: Lets Play, what is this!
Okay, just sayin...
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#5 |
Senior Member
Join Date: May 2003
Location: ne florida
Posts: 2,665
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Re: Lets Play, what is this!
is there an engine under all that ??????????? lol
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#6 |
Getting Old; Going Broke
Join Date: Apr 2010
Location: Owasso OK
Posts: 2,764
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Re: Lets Play, what is this!
OK then, so it can't be anything that important. The vacuum line goes to the water neck, and the Y in the line it is on, the other line went up to the air cleaner housing.
And yes, that is a crap load of vacuum lines under there, especially for a 79 model. It's about to go on a diet under the hood there tomorrow. I'll stop off at Advanced and get a kit of plugs and start going to town. I know I need the EGR, and will probably keep anything that goes to something that hooks on to the carb, in case it is part of the choke or something. I also need to follow the two big hoses that run off the cruise module and see where they go, maybe get rid of the cruise module and put a 1 piece speedo cable on it.
__________________
Why is every used 350 sbc out of a corvette? There's only two things that excite a man, expensive toys and real expensive toys. VEGETARIAN: That's an old Indian word meaning "I don't hunt so good." When the going gets tough, switch to power tools. |
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#7 |
Account Suspended
Join Date: Dec 2007
Location: Unnapreciative, Trollville
Posts: 2,079
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Re: Lets Play, what is this!
The thing circled in the picture closes the valve in the exhaust to block it off so exhaust will flow through the crossover in the intake manifold. This helps the engine warm up quicker. If you remove it, make REAL sure the valve in the exhaust is permanently blocked OPEN. If you dont youll end up with that side exhaust manifold glowing red one day.
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#8 |
Getting Old; Going Broke
Join Date: Apr 2010
Location: Owasso OK
Posts: 2,764
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Re: Lets Play, what is this!
Finally found the item in question in the Haynes manual. They are calling it a Power Actuator (Early Fuel Evaporation system?), and should have a rod going down to the exhaust to open and close the valve (as you mentioned, 2 points!). Only issue is, there is no rod going anywhere off of this thing. Now I'll have to go back and see if any of the pieces are on the exhaust or not. It has had duals put on it at some point, so I'm doubtful it is still there.
__________________
Why is every used 350 sbc out of a corvette? There's only two things that excite a man, expensive toys and real expensive toys. VEGETARIAN: That's an old Indian word meaning "I don't hunt so good." When the going gets tough, switch to power tools. |
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#9 |
Registered User
Join Date: Nov 2002
Location: Maryland
Posts: 82
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Re: Lets Play, what is this!
Thanks! Now I can take that crap off of my '79!!!!!!!! ahahahaha
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#10 |
Getting Old; Going Broke
Join Date: Apr 2010
Location: Owasso OK
Posts: 2,764
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Re: Lets Play, what is this!
That power actuator does have an arm going down and is hooked to a door or something. It does move and I can feel a spring with tension on it. For now I'm just leaving it be I guess, since I don't know which way is open. I do see a lot of steam coming up out of the right manifold, sorta makes me wonder if the door is really moving inside the pipe.
__________________
Why is every used 350 sbc out of a corvette? There's only two things that excite a man, expensive toys and real expensive toys. VEGETARIAN: That's an old Indian word meaning "I don't hunt so good." When the going gets tough, switch to power tools. |
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#11 |
Registered User
![]() Join Date: Jul 2003
Location: Franklin, NE
Posts: 387
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Re: Lets Play, what is this!
It controls the heat riser on the exhaust manifold, part of the light duty emissions package for that year. I have a 78 k10 with the heavy duty emissions and it doesn't have any emissions gear. Your best bet is to find a 78 big 10/heavy half with heavy duty emissions.
Last edited by dswancutt; 04-24-2011 at 11:25 AM. |
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#12 |
Registered User
Join Date: Dec 2010
Location: sioux city, iowa
Posts: 619
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Re: Lets Play, what is this!
Who's the genius who invented all that crap anyway?
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#13 |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: Lets Play, what is this!
some of the heatrisers have a little nib stickingout from the valve that can be tied off to keep open
some can be removed, it can be easier to remove the valve and tac up the holes left from the valve
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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#14 |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: Lets Play, what is this!
this is what it is made like basicly
some just get a spacer to replace it last pic but i've also seen a whole drilled in the pipe wire poked in an used to prop it open and tac the busted off nib /valve open
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 Last edited by motornut; 04-26-2011 at 04:19 PM. |
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#15 |
Getting Old; Going Broke
Join Date: Apr 2010
Location: Owasso OK
Posts: 2,764
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Re: Lets Play, what is this!
I have yet to crawl under the blazer and look at what it is on the exhaust. If it is indeed a piece like you show, that is removable, it just might find itself removed and made hollow and put back.
I'm also going to just make a plate and cover the EGR area on the intake, or so I think. ![]()
__________________
Why is every used 350 sbc out of a corvette? There's only two things that excite a man, expensive toys and real expensive toys. VEGETARIAN: That's an old Indian word meaning "I don't hunt so good." When the going gets tough, switch to power tools. |
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#16 | |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: Lets Play, what is this!
Quote:
that worked for a little while (found it burnt threw the next year) got the right cover
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 Last edited by motornut; 04-26-2011 at 08:35 PM. |
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#17 |
Account Suspended
Join Date: Jan 2011
Location: Allen, TX
Posts: 188
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Re: Lets Play, what is this!
Just take a torch to the butterfly valve its self and remove it, keep its appearance for smog even tho its empty.
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