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03-31-2021, 04:00 PM | #1 |
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Inline 6 is really tired
1963 C20, 292 inline 6, stock distributor with Pertronix, 1bbl Rochester carb, 5-speed T5
Just drove this thing about 20 miles; pretty warm out today. Thing is, it’s gutless!! No power, climbing up a gradual incline is not good. After a few miles, the temperature started creeping up. Once I turned around, and started going downhill, it cooled off. When driving around town, the temperature is ok, always stays on the far left of the gauge. And, these brakes drag- coming up to a stop light, I can feel it holding back when in neutral. If it’s level ground, it comes to a stop like my foot is on the brake. If it’s a slight incline, it stops, then starts to roll backwards. Can’t wait to get that front end in here with disc brakes.
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1963 C20, small window, long bed 292, 4-speed Last edited by Asshat; 03-31-2021 at 04:26 PM. |
03-31-2021, 04:25 PM | #2 |
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Re: Inline 6 is really tired
I read other post, and some people changed the orientation of their carb; mine is a 1bbl, so I don’t think that would be it.
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1963 C20, small window, long bed 292, 4-speed |
03-31-2021, 07:03 PM | #3 |
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Re: Inline 6 is really tired
Regarding checking the valve lash adjust, is it ok to check it statically? By turning engine over until both valves of the cylinder are closed and spinning the pushrod between your fingers?
Hate doing it while it’s running, such a mess. There’s always a pushrod that is spewing oil everywhere.
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1963 C20, small window, long bed 292, 4-speed |
04-04-2021, 05:32 PM | #4 | |
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Re: Inline 6 is really tired
Quote:
When people hot rod their L6 to sport a four barrel, then there's some discussion. Some folks think the truck won't go forward properly if the carb is oriented sideways. The other school contends that the carb should be aligned so the primaries open equally over both plenums for cylinders 1-2-3 and 4-5-6. Not primaries opening over 1-2-3 and secondaries over 4-5-6. And some ''experts'' say it's too close to matter unless you're drag racing. Personally, I don't mind a sidesaddle carb. In fact it's easier to tune it over the drivers side fender, than bellyflopping across the radiator. But it's a free country.
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Every 25 years I like to rebuild that 292, whether it needs it or not. |
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04-04-2021, 06:09 PM | #5 | ||
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Re: Inline 6 is really tired
Quote:
Quote:
Compression check - I need to do this. I can see the vacuum advance at the distributor is moving, when I rev the throttle, the vcuum advance is moving the distributor plate and linkage. I don't want to just re-build the I6 - thinking about picking up a GMC 305E V6 - would rather rebuild that motor. I'm just wondering why mine is so sluggish. Same thinking with the Offy intake manifold - if this motor is crap, why should I dump money into an intake or a new exhaust?
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1963 C20, small window, long bed 292, 4-speed |
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04-04-2021, 06:42 PM | #6 |
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Re: Inline 6 is really tired
You have been all over the board between LS engines to V-6 to?
I'm not trying to be a dick but at some point you have to make a decision. I've been in your shoes so not casting stones here...... I would go small block V-8 and don't look back. Just my .02 after a little tequila |
04-04-2021, 06:48 PM | #7 | |
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Re: Inline 6 is really tired
Quote:
I have a 5-speed on the floor, so if I go with an automatic, I got extra setups to do fit that, plus getting a column with the shifter. I’d rather just keep it 5 speed, but want a decent motor that doesn’t bog-out on a slight incline.
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1963 C20, small window, long bed 292, 4-speed |
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04-04-2021, 06:43 PM | #8 | |
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Re: Inline 6 is really tired
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It’s all one one plane inside just like a single plane intake. |
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04-04-2021, 09:43 PM | #9 |
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Re: Inline 6 is really tired
I didn't. But I think the alignment over center is more important than the Fore-and-Aft School.
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Every 25 years I like to rebuild that 292, whether it needs it or not. |
04-05-2021, 12:47 AM | #10 |
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Re: Inline 6 is really tired
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03-31-2021, 07:01 PM | #11 |
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Re: Inline 6 is really tired
If the brakes are truely dragging then is the engine really tired or just being held back by brakes?
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03-31-2021, 10:25 PM | #12 |
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Re: Inline 6 is really tired
If that was the case, I would be really slowing down between shifts. It’s not dragging that much. It still coasts to a stop when coming to a light.
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1963 C20, small window, long bed 292, 4-speed |
03-31-2021, 10:40 PM | #13 |
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Re: Inline 6 is really tired
Plugs look pretty good.
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1963 C20, small window, long bed 292, 4-speed |
03-31-2021, 07:21 PM | #14 |
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Re: Inline 6 is really tired
Make a wall from cardboard to stop oil splashes.
When setting them you should wiggle the rockers to get any slack out. Twisting the rods isn’t accurate. |
03-31-2021, 09:44 PM | #15 | |
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Re: Inline 6 is really tired
Quote:
A while back, I tried the running method, I just couldn’t tell which valve was making noise.
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1963 C20, small window, long bed 292, 4-speed |
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03-31-2021, 10:15 PM | #16 |
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Re: Inline 6 is really tired
There are some knuckle draggers like me who can still twist the pushrods when the valve is wide open.
More accurate with wiggling them. |
04-01-2021, 01:48 PM | #17 | |||
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Re: Inline 6 is really tired
Quote:
Usually trying to twist a chromoly oil soaked pushrod between your oil soaked greasy fingers, you don't realize that the rod is actually slipping between your fingers as pressure is put on the rod as you tighten the rocker nut. Leads to having too much preload added to your adjustment. So wiggling them up and down is usually more accurate to know when all lash is taken out. After doing this for almost 40 years, I wiggle them up and down until I can't feel anymore lash, and then gently twist them too. Gary
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04-01-2021, 02:11 PM | #18 | |
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Re: Inline 6 is really tired
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I’m confident the valves are not the issue. I’ll advance the timing next; we’ll see how that goes. I’ll also check the brakes, however, I’m pretty sure they’re not dragging that bad. It’s just annoying as hell.
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1963 C20, small window, long bed 292, 4-speed |
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03-31-2021, 10:16 PM | #19 |
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Re: Inline 6 is really tired
What’s your initial timing?
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03-31-2021, 10:23 PM | #20 |
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Re: Inline 6 is really tired
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1963 C20, small window, long bed 292, 4-speed |
04-01-2021, 12:14 AM | #21 |
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Re: Inline 6 is really tired
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04-01-2021, 02:52 PM | #22 |
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Re: Inline 6 is really tired
Don’t cut the top off.
12 holes works better. |
04-01-2021, 03:00 PM | #23 |
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Re: Inline 6 is really tired
I’ll need a template!
That's a pretty good idea. I'll have to take some measurements, next time I pull the valve cover. Unless, someone knows the dimensions?? Would be even better if there was a plug that could be put back in place to seal up the hole.
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1963 C20, small window, long bed 292, 4-speed Last edited by Asshat; 04-01-2021 at 03:08 PM. |
04-02-2021, 07:07 PM | #24 |
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Re: Inline 6 is really tired
I advanced the timing and replaced the front drums. Seems to be running a little, better but hard to tell. Still doesn’t pull up the grade.
And, the brakes are not dragging now. Wondering if I should bother putting any more money into this motor; thinking I should start putting money away for a 383 stroker.
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1963 C20, small window, long bed 292, 4-speed |
04-02-2021, 07:42 PM | #25 |
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Re: Inline 6 is really tired
What gear are you in when pulling the grade?
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