Register or Log In To remove these advertisements. |
|
|
|
Thread Tools | Display Modes |
04-21-2021, 08:32 PM | #1 |
Registered User
Join Date: Jul 2015
Location: South Orange County CA
Posts: 1,259
|
Inline 6 - cam install question - 292
When removing the front cover for the cam, is it absolutely necessary to remove the oil pan? Or, can I just remove the bolts that go into the front cover?
Thinking about a cam upgrade for the motor, but I'm not sure if it is worth the trouble. Maybe I should just do the 4bbl intake with Rochester carb?
__________________
1963 C20, small window, long bed 292, 4-speed |
04-23-2021, 01:06 AM | #2 | |
Senior Member
Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 6,980
|
Re: Inline 6 - cam install question - 292
Quote:
If you replace the cam, you'll have to get fresh lifters too. When I did it the whole thing was apart, so I could reach thru a cylinder hole and guide the cam end along. Do cams have their own bearing halves, like the crank and pistons? I don't remember... The crank was installed later, too. I guess you could R&R the cam thru the front Timing Gear Cover without dropping the Oil Pan. Pull the lifter side plates off to change out the lifters. Pushrods should be good if not bent or chewed -- put them back in their same hole. To get the head off in situ, you will have to pull the pushrods out, and 5 & 6 are problem children, as they are too long and hit the alcove of the firewall. * Solution is to loosen drivers side motor mount and remove passenger side mounts and rotate whole block 30* to truck's right. The radiator, grille, and maybe radiator bulkhead have to go too, to get a straight shot thru the front to mount the cam. You will need a new set of timing gears. Don't use plastic, get aluminum. * Redneck solution is to make 4 - 1'' holes in the firewall 'roof' with an electrician's hole cutter, but that's kinda ugly and requires patching later. Pros will pull the hood and radiator and cherry pick the engine out, so they can work on it in a shop. In the pic below, we pulled the whole doghouse off, except for the passenger side fender and skirt, which we left for reference. But that was an engine swap. L6s don't like to lift out with the trans attached too.
__________________
Every 25 years I like to rebuild that 292, whether it needs it or not. |
|
04-23-2021, 01:12 AM | #3 | |
Registered User
Join Date: Jul 2015
Location: South Orange County CA
Posts: 1,259
|
Re: Inline 6 - cam install question - 292
Quote:
Maybe I’m just better off doing the carb for now, and maybe pick up another motor in the future.
__________________
1963 C20, small window, long bed 292, 4-speed |
|
04-23-2021, 03:00 AM | #4 |
Senior Member
Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 6,980
|
Re: Inline 6 - cam install question - 292
Yeah. That's a lot less hassle.
__________________
Every 25 years I like to rebuild that 292, whether it needs it or not. |
04-23-2021, 12:19 PM | #5 |
Senior Member
Join Date: Jan 2018
Location: Hickory Flat, GA
Posts: 4,419
|
Re: Inline 6 - cam install question - 292
I would start with some upgrades on the intake side of things to get better air flow through the engine. If you decide you want more, then you can do a cam or even full rebuild with go fast parts.
There's always the option of a turbo, but that gets expensive, real quick
__________________
Christian Carpenter 1963 C10 - Frankentruck 283, 3 speed with overdrive Overdrive wiring here1963-ish truck bed trailer - Half-Wit 1981 C10 - Penny 305, th350 1995 Dodge Dakota Sport "I'll put it simple: if you're going hard enough left, you'll find yourself turning right." - Doc Hudson |
04-23-2021, 05:18 PM | #6 |
Senior Member
Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 6,980
|
Re: Inline 6 - cam install question - 292
If you're not already aware of it, I would suggest acquiring a copy of Leo Santucci's book, "Chevrolet Inline Six Cylinder Power Manual.'' [C.] 2002, California Bill's Automotive Handbooks, Tucson, AZ, USA. ISBN 1-931125-15-4.
I have the first edition. I understand the 2nd Edition is out now.
__________________
Every 25 years I like to rebuild that 292, whether it needs it or not. |
06-09-2021, 12:01 AM | #7 |
Registered User
Join Date: Jul 2015
Location: South Orange County CA
Posts: 1,259
|
Re: Inline 6 - cam install question - 292
Does the head need to come off to replace the camshaft? I am thinking about pulling the motor, but not sure if I want to pull he head.
Also, I have researched a few camshafts and I can see from the rpm ranges, I am probably better off in the 2000-4500 rpm range. The cams with the lpey idles sound great, but their driveability decreases too; like those that perform in the 2500-5600 rpm range. I'm thinking about this one, and upgrading to headers and a 4bbl intake manifold. https://www.summitracing.com/parts/h...make/chevrolet Here's some from Summit Racing, all of these are hydrulic flatt tappet cams. Pretty sure they would work in a stock motor. https://www.summitracing.com/search/...ft&kr=camshaft Appreciate some input on these - am I crazy for even trying one of these?
__________________
1963 C20, small window, long bed 292, 4-speed |
06-09-2021, 12:45 AM | #8 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,494
|
Re: Inline 6 - cam install question - 292
If I remember right the pushrods on #6 can’t be removed unless the motor is moved well forward or a clearance hole is drilled in the firewall.
And in my humble opinion none of those cams match your compression ratio. Good cams if you don’t mind loosing 5 mpg and driving around at 3500 rpm all the time. |
06-09-2021, 04:36 AM | #9 |
Senior Member
Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 6,980
|
Re: Inline 6 - cam install question - 292
If you don't want to pull the block, you could disconnect the motor mounts and rotate the block 45* to the passenger side. [But that's a hassle in itself.] The pushrods for Cyls 5 & 6 are not convenient.
I agree with Geezer, those cams are too wild for a daily driver. I'm running a Crane Cam 260H, but Crane folded a few years ago, so no soap there. It has 260* / 272* advertized duration, with .498 intake and .530 exh lift. Notes state: '' 1963 - 1984 Cheverolet 6 Cylinder 292 cu in. Smooth idle, daily usage, off road, light towing, economy, also mild turbocharged.'' Have you looked on www.cliffordperformance.net www.12bolt.com ?
__________________
Every 25 years I like to rebuild that 292, whether it needs it or not. Last edited by '68OrangeSunshine; 06-09-2021 at 04:42 AM. |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|