4020 block heater

MRogersII · Nov 13, 2017

Can someone tell me the best place to install a block heater? I'm finishing a rebuild and don't see a place for one. Thank you
Michael

Bob Harvey · Nov 13, 2017

There is a spot , if you look in the manual.

coonie minnie · Nov 13, 2017

I'm guessing yours is not a 71 or 72 with the knockout plug in the block (left side).

Usually on earlier ones they are tapped into the block drain plug ahead of the starter, and fed to the heater mounted on the right side by the oil cooler. From there a line is run to one of the plugs in the
head, or can be tapped into the top of the oil cooler.

I'm sorry I don't have a picture, but have 3 here set up like that.

MRogersII · Nov 13, 2017

1968

newgenjdcollector · Nov 13, 2017

The canister heaters work well on the pre console 4020s

Tx Jim · Nov 14, 2017

Factory engine heater plumbed into left side of block where 1/4'' drain cock is located & RH side of cylinder head(pipe bushing 3/4'')

buickanddeere · Nov 14, 2017

. Top of coolant heater is pipes to the highest coolant port on the engine side of the coolant thermostats.
Bottom of coolant heater is plumbed to the lowest port on the engine block.
Heater can not be above or below engine ports .

David G · Nov 15, 2017

Wherever you pipe it, make sure the tank is below the lowest point in the water jacket so it can circulate correctly.

buickanddeere · Nov 15, 2017

(quoted from post at 08:33:57 11/14/17) . Top of coolant heater is pipes to the highest coolant port on the engine side of the coolant thermostats.
Bottom of coolant heater is plumbed to the lowest port on the engine block.
Heater can not be above or below engine ports .

Correction, what was I thinking. heater level lower port level with or lower than the lower port from the block.

4020 block heater

MRogersII

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Bob Harvey

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coonie minnie

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MRogersII

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newgenjdcollector

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Tx Jim

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buickanddeere

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David G

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buickanddeere

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