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There’s a lot of information on the bypass online, but the general consensus is that as long as you’re not driving your car in cold weather and your thermostat has a built in bypass you can simply remove the hose and block the ports.
There’s a lot of information on the bypass online, but the general consensus is that as long as you’re not driving your car in cold weather and your thermostat has a built in bypass you can simply remove the hose and block the ports.
I found some mixed info that seemed unrelated to 454's... mostly on LS engines. Some of what i had found is that it may be necessary to prevent cavitation in the pump and steam pockets in the t stat housing... didn't see anyone with a C3 not routing a bypass like i currently am but figured if i asked someone would say they have been without issue...guess not. Thanks!
I found some mixed info that seemed unrelated to 454's... mostly on LS engines. Some of what i had found is that it may be necessary to prevent cavitation in the pump and steam pockets in the t stat housing... didn't see anyone with a C3 not routing a bypass like i currently am but figured if i asked someone would say they have been without issue...guess not. Thanks!
No problem, quick question. Is that paint or powder coating on your intake manifold? I like the finish it has.
Last edited by Piersonpie; Oct 2, 2024 at 05:35 PM.
No problem, quick question. Is that paint or power coating on your intake manifold? I like the finish it has.
Powdercoat - i had it powdercoated wrinkle red to match a ferrari valve cover i had seen to go with the wrinkle black valve covers i have on there. I don't have any good pics right now but i could get some later if you want to see it better.
I found some mixed info that seemed unrelated to 454's... mostly on LS engines. Some of what i had found is that it may be necessary to prevent cavitation in the pump and steam pockets in the t stat housing... didn't see anyone with a C3 not routing a bypass like i currently am but figured if i asked someone would say they have been without issue...guess not. Thanks!
To that specific point, the L48 (Gen 1 350 SBC) in my 80 is perfectly happy with the heater ports plugged, no bypass, but with a tiny hole in the thermostat.
I suspect the hole in the thermostat is more critical for a big block, but I've never run one. I did put bypass holes in my LS engines, and plugged the heater ports.
I’ve seen some just create a little loop of hose, from the supply and back to the return. Not purty or fancy, but may prevent the mentioned cavitation.
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Water pump block offs
