can I block this hole??
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From: Blenheim NZ
Car: 1983 Camaro Berlinetta
Engine: L31
Transmission: 700r4
Axle/Gears: 3.73
can I block this hole??
Hi All
I have an L31 vortec block which I intend to fit with electric water pump.
Trouble is, theres a hole directly below the mounting bolt for the WP which my electric wont cover.
It is the 10mm hole directly below the bolt hole.
It is covered by the standard waterpump.
What is this hole for? It is in the water jacket.
Can it be safely blocked off
Cheers Geoff
I have an L31 vortec block which I intend to fit with electric water pump.
Trouble is, theres a hole directly below the mounting bolt for the WP which my electric wont cover.
It is the 10mm hole directly below the bolt hole.
It is covered by the standard waterpump.
What is this hole for? It is in the water jacket.
Can it be safely blocked off
Cheers Geoff
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Joined: Jun 2011
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From: knoxville tn
Car: 86 IROC
Engine: 5.0 TPI
Transmission: 700-R-4
Axle/Gears: 2.73 open
Re: can I block this hole??
that hole is for a bit of circulation when the thermostat is closed. I wouldn't block it off.
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Joined: Jul 2014
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From: Blenheim NZ
Car: 1983 Camaro Berlinetta
Engine: L31
Transmission: 700r4
Axle/Gears: 3.73
Re: can I block this hole??
Hi Rusty
I wont be running a thermostat. My electric WP pulses when engine is cold to allow faster warmup.
Manufacturer recommends no thermo
I wont be running a thermostat. My electric WP pulses when engine is cold to allow faster warmup.
Manufacturer recommends no thermo
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From: Philly, PA
Re: can I block this hole??
My guess is your electric water pump won't even cover that port (at least not completely). If that's the case, you MUST plug it, otherwise water will come OUT of it.
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Joined: Jul 2014
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From: Blenheim NZ
Car: 1983 Camaro Berlinetta
Engine: L31
Transmission: 700r4
Axle/Gears: 3.73
Re: can I block this hole??
Yeah damon, that's correct. I just wanted to ensure that that hole wasn't vital before I plugged it.
If its just a by-pass for the thermostat that's ok I will plug it
If its just a by-pass for the thermostat that's ok I will plug it
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Joined: Jun 2013
Posts: 497
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From: El Sobrante, California
Car: 1984 z28
Engine: Crate replacement L31R 350
Transmission: T56
Axle/Gears: 7.625" 28 spline 3.23
Re: can I block this hole??
I believe that hole does not go to coolant like a non vortec sbc does. Pretty sure its a dead end and you dont need to plug it.
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Car: 85 Trans Am
Engine: 98 Vortec 350 LT1 Cam w/ TPI
Transmission: T56
Axle/Gears: 9 bolt 3:27
Re: can I block this hole??
Simple test is blow into it with an air gun. If the air comes back at you it goes nowhere. If the air bleeds out somewhere then it goes into the coolant passages and must be plugged for your application.
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