r/Smallblockchevy

Previous Owner Installed Cam But Never Started Engine
▲ 44 r/Smallblockchevy+1 crossposts

Previous Owner Installed Cam But Never Started Engine

I recently bought a project C20. The previous owner was an older gentleman who had lost interest in the truck, and the project sat for years.

He says he installed a comp cams high energy 268H into an otherwise stock 350 out of a ‘78 K10. It’s my understanding that the engine never ran after he installed the cam.

So, after it’s sat all this time, and there’s a lot of unknowns, what should my process be regarding breaking in the cam? I’d prefer to avoid catastrophic engine failure, but I’m also reluctant to tear everything back down to inspect the cam.

I appreciate any insights.

u/Rosco-P-Soul-Train — 6 days ago

Tips for Cleaning 350 Oil & Coolant Passages?

I need some tips on how to clean the coolant and oil passages on this 350. I got this 350 from my dad when he bought this 70 C10 and he ended up selling the truck and left the engine semi covered for about 8 months outside under our carport. Long story short, the plastic covering it started to rip open and some water started to get in. It wasn’t too bad as the engine still turned over and nothing stuck. Sadly there is some gunk that seems to be murky water or water/oil mixture in some of the passages. I’ve used air and just turning the engine upside down and sideways to drain it but it seems like there’s just an endless amount. Does anyone have any tips on how to clean these passage out? It’s a GM GoodWrench Crate Motor and has cleaned up nice other than that. Don’t wanna put even a bit of money in it and the coolant system be the fail off the bat lol

u/bigharb72 — 6 days ago
▲ 2 r/Smallblockchevy+1 crossposts

Engine Rebuild: Which Pistons and Piston Rings

Hey guys,
I’m rebuilding a 1976 Chevrolet Small Block V8 and I’m trying to figure out which pistons and piston rings I should go with.

The engine will mainly be used for street driving, maybe some occasional spirited driving, but nothing crazy. I’m looking for something reliable with good durability.

What piston brands would you recommend?
And which piston rings work best for these engines nowadays?

Also, are there any common mistakes or compatibility issues I should watch out for during the rebuild?

Thanks!

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u/SnooMuffins4589 — 6 days ago
▲ 16 r/Smallblockchevy+1 crossposts

85 c10 305

Trying to figure out what’s what here. when I got the truck none of the sensors were connected at all. Only Vacuum hoses. I’d like the coolant and oil gauge to work. I know for sure ( I think) the oil pressure is in the rear next to the distributor and which one it is. (Bottom right in pic) But there are a couple of sensors in the thermostat housing, one in the side of the front driver side of the block, and another in the intake I assumed was the pcv. (Bottom left in pic) The new thermostat housing doesn’t come with connection ports built in and this is my first project, and I don’t have much knowledge, so I’m a little confused. Any input is appreciated, I was also told I didn’t need any of the crap but I wanna do the truck justice and make it run right also, not just do the bare minimum. I did delete the egr with the new manifold so I don’t have to deal with that. Wiring is a mess, that’s next on the list. New distributor and plug wires on the way. Just wanna get the holes plugged.

u/LongjumpingBad9881 — 7 days ago

Bogging with throttle snaps better video

Thanks for the comments on the last post. I took a video at the engine this time and you can see and hear the issue a lot better than in the car. Thanks in advance for the help. For new people I have the car set at 16 BTDC, has a 4 barrel 650 edelbrock, electric fuel pump at 6.5 psi, headers, aluminum heads, dual plane manifold and im having issues with throttle snaps where the engine just falls on its face. Im new to carbs so Im a bit lost and dont want to mess with it and potentially make it worse. Thanks in advance.

u/YaBoiSupernova — 10 days ago

Main Bearing Clearance issues

How unusual is it for my crank play to be only like .0005 and my bearing clearance with the plastiguage to be .002 too loose. The plastiguage is barely touched at all. I thought I would need the thicker bearings but I see they only come in sizes by .01 increments (which is way more than I need.) I thought I would maybe need to get the .01 and sand them down by .008 but that seems off. I figure I’ll have to sand down the rear thrust bearing by a few thousandths to fix the endplay. I torqued everything to spec as far as I know. (65ft-lbs for outer bolts and 70 for inner) I also applied some oil to the bolts before torquing down for more accurate reading. I’d appreciate any tips as this is the first engine rebuild I’ve ever done.

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u/EvenCombination2208 — 9 days ago

383 Chevy

383
880 4 bolt block
Scat crank/ rods
Wiseco pistons
Howard’s HR. 247/253 @50 duration, 604/624 lift w/ 1:6 rockers 108 lobe separation / isky-Johnson lifters
Same engine but running that I posted a few weeks ago about flooding /heat soak issues. I discovered that the fuel line in front of the tunnel ram gets hot to the touch. Going to put heat wrap on it.

u/Mijollnir70 — 12 days ago

NEED HELP - 1980 Trans Am 383 Stroker

I recently bought a 383 stroker a couple weeks ago. I’ve been driving it and had no problems. Until today after I was done driving it was leaking coolant. Upon looking at it it was leaking from the fuel vapor charcoal canister. There is a coolant hose going from the top of the radiator to it. I cannot find anywhere why that hose is there. Shouldnt it go to an overflow tank? And if not why is it routed there. I’m not an expert on cars as I’m just getting into it but this does not seem right. I asked the old owner and he said he never had any issues with this. The part number for canister is 17063014.

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u/Hayden74747372 — 11 days ago

400sbc with th400 tranny

I recently bought a 1979 400 small block with a th400 transmission that I pulled from a camper. It has an old RV cam and I have long tube headers and a high rise for it aswell as an oil cooler but I'm wondering how well it'll fit into a 1994 Chevy c1500 and if there's any other inexpensive upgrades anyone would recommend

u/raccoon_eggs23 — 12 days ago
▲ 7 r/Smallblockchevy+1 crossposts

Need help here

84 z28 camero. 305 sbc. Changed from tbi to carb. While driving I’m hearing a “tick” noise every now and then and my rpm’s drop and the car kinda “bucks” does this sound like a misfire? Could it be the timing? I checked and changed all the plugs. Didn’t change the wires but they seem fine.

u/Elonisking — 10 days ago
▲ 8 r/Smallblockchevy+1 crossposts

Bogging with throttle snaps

I just got this 2nd gen camaro that im told has a 383. The block is a 327, has aftermarket aluminum heads, headers, msd hei, and an edelbrock 650. I set the timing to 16 degrees btdc and got the highest vacuum I could while tuning the carb. Im new to the whole carburetor world and am trying to learn. From what Ive read my issue seems to be with the carb or the carbs accelerator pump. I tried putting the linkage in the top, middle and bottom spots on the accelerator pump linkage and it didn't make a ton of difference. I also tried revving the throttle arm at the carb with the throttle cable, kickdown and return spring disconnected and it behaves the same. I'm hoping someone might have some suggestions or advice for me on this issue. Thanks in advance.

u/YaBoiSupernova — 11 days ago

mysterious misfires I've tried just about everything.

i have a 1981 corvette which i fully rebuild the 350 in it, roller cam, aluminum heads, intake, pistons ect. This thing is running on like 5 cylinders. I figured out the intake manifold wasn't sealing to the heads because the angle was off, i got the intake machined and still the same issue, ive checked compression, plugs, wires. originally i found out it was the intake because if i sprayed starter fluid by the intake with it running it would rev up also when i took off the intake i could see towards the bottom of the ports it was not compressing the gasket and had oil. Assuming its still the intake what could i do to make it seal? i dont wanna spend another 200 to get it machined and sillicone isnt doing the trick.

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u/Remarkable-Low4520 — 13 days ago

4bbl for 2bbl swap?

I've got a 307 I'm trying to have a tiny bit more fun with... She does ok in fuel, and I'd like to hold onto that, so I was hoping to find a spread bore 4 barrel to replace the Rochester I've got.

The calcs I'm doing estimate like a 450cfm carb would be the right size, and I'm only seeing the no-longer-produced Holley 4360 in that place in the lineup.

A) is my line of thinking wrong &

B) are there better (preferably not TBI) options?

Thanks!

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u/AlexAndMcB — 13 days ago

Mannual Swap Questions

Howdy! I am currently putting a borg warner ST-10 into my 76 El Camino, it has the factroy 350 small block and I am at the stage where I have all of the needed parts other than the pedals and the fastners/hardware. My main question is, are ARP flywheel, bellhousing, and pressure plate bolts really needed, or could I go for something like summit brand bolts?

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u/koharu_345 — 13 days ago