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Old 04-23-2012, 09:27 AM   #1
graphicjunki
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Weekend follies and questions...

I tried to install my headers and side pipes this weekend. It went horrible. My stock exhaust was all welded together, so I had to cut it out. That was fine. Got the trusty ol' sawz all out and made short time of that. Started taking the stock exhaust manifolds off and discovered while moving the factory A/C out of the way, that half of it was missing. So the rest came out. Opened up the bay quite a bit on that side. Found a funky temperature spring driven butterfly valve on the passenger side manifold that later research indicates is for warming up the engine. Cool...something learned. But when the time came to start the ASSEMBLY, it was a no go. I couldn't get the headers to slide in from the bottom. Couldn't get them to go in from the top down. Since I have YET to find my casting numbers on this engine, I decided it was time to pull the engine. (good excuse, right?) So the car comes down off the stands and gets moved back into the garage. As I start to dig in, I start to turn my fears to reality. MANY HIDDEN HACK JOBS! Wiring spliced everywhere, vacuum hoses rotted and mcgivered to work anyway. But the coup de grace, was the huge chunk of my radiator missing. So I was really GLAD I decided to pull the engine. I gutted the broken fan shroud, because it's getting an electronic conversion too. I found a radiator out of a 76, picking it up for $150 on the 27th.
But now I can degrease the engine and find the casting numbers to find out what I have.
I didn't really want to tear into the car just yet, but to drive it a little and enjoy it before it settled into it's hibernation / rejuvenation mode....but oh well.

So I've got all the hoses and wires and cooling system detached and then called it a night. Next to disconnect the trans and pull it out.

Forgot the question: Do you HAVE to pull the engine to do these headers/pipes?! If not, then HOW THE HELL?!!! lol!

Last edited by graphicjunki; 04-23-2012 at 10:57 AM.
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WillyB - 1975
L48 Bore'd and cam'd 355 - vortec - Dougs headers and side pipes - 200R4 - e-fan - quicksilver

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Old 04-23-2012, 03:28 PM   #2
wildcatlock
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The guys I know always unbolt one side at a time and "roll" the engine up, slide in the header and reinstall bolt. Repeat for other side. Doesent take much to make a world of difference. And starter removed helps also. Best fitting headers I have ever seen for a vette are from melrose. Got them on both my c4's and they literally dropped right in place.
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Old 04-23-2012, 03:48 PM   #3
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Side pipe headers should slip in from underneath the car without even loosening the engine mounts.

Remove old exhuast
Remove starter
Remove clutch hardware (if manual)
Slip in headers
Bolt them up
Install side tubes

The car does need to have the nose up off the ground as high as possible to be able to manuver the headers into place. A foot or so will not be high enough.

That said....I ended up doing the same thing. I dropped the trans to install a new clutch and ended up pulling the motor the same day after my brother in law says, "It's only two more bolts."

You have to watch the ....while your at its.

What side pipes do you have? What brand?

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Old 04-23-2012, 06:37 PM   #4
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Quote:
Found a funky temperature spring driven butterfly valve on the passenger side manifold that later research indicates is for warming up the engine. Cool...something learned.
What you are referring to is called a heat riser



It closes when cold and forces exhaust gases back thru the center of the head thru a passage in the intake manifold and out the other exhaust pipe. raising the temp of the manifold and improving gas vaporization in cold weather.
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Old 04-23-2012, 07:20 PM   #5
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Welcome to the world of C3 restoration!
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Where am I going? and why am I in this handbasket??
Old 04-24-2012, 07:58 AM   #6
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We had the nose so high on the Jack stands the damn thing looked like it was wheelie launching! I was actually getting a bit nervous to be under it. But it didn't work still. Although I didn't think about removing the starter. Duh...
But I'm glad that I am pulling the engine anyway.

Headers type is "doug's headers".
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WillyB - 1975
L48 Bore'd and cam'd 355 - vortec - Dougs headers and side pipes - 200R4 - e-fan - quicksilver

**Coming!**
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TPI/SC 406

http://photobucket.com/Willys75Stingray
Old 04-26-2012, 02:10 PM   #7
stingr4y
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I dropped my engine in after tying my headers in place with rope.

It worked fine. I have done it both ways, but that was easier.
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Old 04-26-2012, 08:39 PM   #8
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I have put several sets of side mount headers and side pipes into C3s without even touching the engine. It's tight, but it's possible.

The key is getting the car off the ground. The last time I did it I put my car up on cinder blocks double high. It was stable and PLENTY of room under the car.

That room will let you twist and maneuver the headers to snake them in past the things that get in the way like the steering box on the driver's side.
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Old 04-27-2012, 05:04 AM   #9
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Getting the car high and level is the key. My headers went in very easily.
So the engine is out now and you found all this mess, maybe now a good time to really get the car apart, take your time and go through everything.
I say pull it off the frame.
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Old 04-27-2012, 07:54 AM   #10
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Quote:
Originally Posted by tektrans View Post
Getting the car high and level is the key. My headers went in very easily.
So the engine is out now and you found all this mess, maybe now a good time to really get the car apart, take your time and go through everything.
I say pull it off the frame.
I haven't pulled it yet. It's ready, but I don't have time during the week to work on it. That's the plan for this weekend though. As far as a body off? I don't have the space to store it separately, or safely. So that's not an option at this point.
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WillyB - 1975
L48 Bore'd and cam'd 355 - vortec - Dougs headers and side pipes - 200R4 - e-fan - quicksilver

**Coming!**
Spirals
TPI/SC 406

http://photobucket.com/Willys75Stingray
Old 04-28-2012, 07:08 PM   #11
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I put a new set of headers on Ol' Red a couple of years ago. I've got a Kwik-Lift- drive the car on, raise the rear and drop the legs. 20 inches off the ground- plenty of room to roll under it on a scooter. Didn't have to jack it up at all. The ramps on the lift are 15 inches wide and the Hooker sidemounts just rolled right in- and around a BB too. The only extra thing I had to do was remove the clutch linkage.
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Horsepower is like potato chips. If you have 300, you want 500. If you have 500, you want 800. One is never enough.
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