Please, what size are the heater core hoses on the 2.8l
1991 Chevrolet S10

Please, what size are the heater core hoses on the 2.8L

(1991 Chevrolet S10)
I need to bypass the heater core on my truck, can't see the printing on the hoses.
What seems to make the problem better or worse? Better when the heater core wasn't leaking
How long have you had this problem? Out of service for several weeks due to overheating
Tags: chevrolet, s10
3 answers & 7 comments
Popular Answer
on December 02, 2018
inlet is 5/8" hose-------outlet is 3/4" hose.
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on December 02, 2018
inlet is 5/8" hose-------outlet is 3/4" hose.
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on December 02, 2018
It would be best to loop the hoses together at the firewall using a connector so coolant still flows through them..
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on December 02, 2018
Understood. My plan is to remove the heater hose going to the water pump, and connect it to the metal tube going to the engine. Connectors, hose and clamps will be involved.
on December 02, 2018

That’ll work .. I’ve witnessed some people just blocking both hoses which isn’t wise.
on December 02, 2018
Thanks for the reply! :D
on December 02, 2018
Does anyone have experience with Blue Devil Pour-n-Go?
https://store.gobdp.com/pour-n-go-head-gasket-sealer-00209/
on December 02, 2018

Yeah I do - it doesn’t work!
on December 02, 2018
That's good to hear. I was thinking about using it...quicker, no real work involved, but it's cheaper to do it the way I explained above. Thanks for the info!
on December 02, 2018
I apologize...I found the answer shortly after I posted. 3/4" x 5/8"
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on December 02, 2018

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