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Hard starting hot 170cc six. What's the issue?
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Author:  Eatkinson [ Sun Nov 20, 2005 3:38 pm ]
Post subject:  Hard starting hot 170cc six. What's the issue?
My '60 V200 is having some issues with starting hot.

If I leave it sitting for more than two minutes, I have to crank the engine for 5-10 seconds before it tries to catch. Then I give it gas and it starts, but rough, and there's a cloud of black exhaust that it snorts. The engine idles roughly for a moment and then smoothes out.

Again this is only if I leave it sitting after it's run hot. Were I to start it right away again, it would be fine. It's just leaving it sitting for 5+ minutes where I run into this issue. It's consistent.

What's the problem?

Thanks, in advance.
Author:  SlantSixDan [ Sun Nov 20, 2005 5:57 pm ]
Post subject: 
Make sure your heat riser is free to move, and isn't stuck in the "heat on" position. If it's been awhile since you went through the carb with a kit, do so or put on a new one if yours is leaky and worn.

'60 cars didn't have fuel filters from the factory. Since you'll want to add one, go do the Fuel line mod and it'll help a lot.
Author:  Eatkinson [ Mon Nov 21, 2005 4:26 pm ]
Post subject:  Is the heat riser...
As you can probably tell by now Dan, I'm a novice at most of the detail work. Good news is, I remember all the advice, once given it.

I've never taken apart my own carb before. Where is the heat riser, and how do I identify it? Do I need to take the carb apart before I can see it?

So, as long as the riser is not worn and is moving freely, excess gasoline that spills into the bowl in the carb won't boil because of the heat and create hard starting? Is that it?

Also, a fuel filter was installed as soon as the car was driveable and the carb was cleaned shortly thereafter, so I think I'm covered there.
Author:  SlantSixDan [ Mon Nov 21, 2005 7:11 pm ]
Post subject:  Re: Is the heat riser...
Quote:
As you can probably tell by now Dan, I'm a novice at most of the detail work.
OK. Here's my standard reading list. Obviously substitute your own model and year for the factory service manual. Do get all three books and read them through.
Quote:
I've never taken apart my own carb before. Where is the heat riser, and how do I identify it?
In the central "collector" area of the exhaust manifold, below the intake manifold. See thread.
Quote:
Do I need to take the carb apart before I can see it?
No, because it's not part of the carb.
Quote:
So, as long as the riser is not worn and is moving freely, excess gasoline that spills into the bowl in the carb won't boil because of the heat and create hard starting? Is that it?
Almost. If the heat riser is stuck in the heat-on position, it'll heat up the carb and boil it like a teakettle, loading up the intake manifold and cylinders with raw gas and making it hard to start.
Quote:
Also, a fuel filter was installed as soon as the car was driveable and the carb was cleaned shortly thereafter, so I think I'm covered there.
Actually...probably not. The 1960 (first-year) carburetor has a fair number of "issues" that cause driveability problems. The fast-idle cam is one of them, and the fuel inlet needle is another. It wasn't rubber-tipped in '60, and therefore floods easily. Of course, you may not have the original carburetor after all these years (all the more reason to get those books!).
Author:  Eatkinson [ Tue Nov 22, 2005 12:37 am ]
Post subject:  Aha!..
Thanks Dan. Now that I know that flapper valve is a heat riser, I should have thought of it before. The manifold is new and the riser valve is also. Turns freely and comfortably. I haven't watched it under hot conditions but will soon.

Evan
Author:  GuyLR [ Tue Nov 22, 2005 6:09 am ]
Post subject: 
FYI 2790 Cubic Centimeters =170 Cubic Inches :wink:
Author:  Charrlie_S [ Tue Nov 22, 2005 2:37 pm ]
Post subject: 
Quote:
FYI 2790 Cubic Centimeters =170 Cubic Inches :wink:
How many cubic feet is that?
Author:  emsvitil [ Tue Nov 22, 2005 2:49 pm ]
Post subject: 
.09838 cuft
.73593 gallons
Author:  Eric W [ Tue Nov 22, 2005 9:09 pm ]
Post subject: 
Since this is engine related, I moved it to the Engine forum.
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