Water temp sender question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Lippyp · 06-26-2011, 07:50 AM

I'm in the middle of rewiring my 350 with a brand new M&H engine wiring harness after finally managing to butcher out the rusted solid bolt from the firewall plug. Offering the harness up it don't seem to fit very well and then it struck me, it would fit better if the oil pressure switch was not where it is. Which side head should it be in? Its currently in the drivers side head but I can't see how with it there the wire will reach it. Should the switch be in the passenger side head as standard?

LONGHAIR · 06-26-2011, 08:55 AM

The sending unit in the head is not for oil pressure. That is the one for water temperature.
You will find the oil pressure sender location in the back of the block near the distributor. That is the usual spot, but there is an alternate location on the side of the block just above the oil filter.

Lippyp · 06-26-2011, 09:16 AM

Ah my mistake, thought it was the oil pressure sender. In which case the question still stands albeit which head should the water temp sender be in, drivers or passenger> I know the engine isn't original to the truck and may well have come from a car so its quite likely the heads have been off and the thing messed around with in the past.

Can a moderator please change the thread title to Water temp sender question please!

cdowns · 06-26-2011, 09:45 AM

driver side head toward the front of engine near #1cyl

LONGHAIR · 06-26-2011, 09:57 AM

Quote:

Originally Posted by Lippyp

Can a moderator please change the thread title to Water temp sender question please!

Done.

Lippyp · 06-26-2011, 10:04 AM

Thats where it is, I must be routing the wires wrong as I can't seem to sort it out so it all fits neatly. The old wiring was so badly hacked aorund not one wire was original and I was missing the brake warning light switch wire, the backup lights, all the ignition stuff was cut out and bodged due to it having a mallory twin point dizzy with the coil mounted on the bulkhead. The wire to the water temp sender had I think four different colours of cable either twisted or soldered together! so I have no idea where stuff should be routed. If anyone can post a picture a standard firewall with all the wires in place I'd be grateful.

06-26-2011, 09:16 AM	#3
Lippyp English Chevy Owner Join Date: May 2002 Location: Shropshire, UK/ Lot, France Posts: 1,848	Re: Oil Pressure Switch question Ah my mistake, thought it was the oil pressure sender. In which case the question still stands albeit which head should the water temp sender be in, drivers or passenger> I know the engine isn't original to the truck and may well have come from a car so its quite likely the heads have been off and the thing messed around with in the past. Can a moderator please change the thread title to Water temp sender question please! __________________ Phil '67 C10 long fleet. 350/TH350, 4 bbl Carter, K&N, Dual exhaust, loads of stuff coming soon 2001 S10 Blazer Daily Driver, bone stock 4 door 4x4 with manual transmission

06-26-2011, 09:45 AM	#4
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Oil Pressure Switch question driver side head toward the front of engine near #1cyl __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

06-26-2011, 10:04 AM	#6
Lippyp English Chevy Owner Join Date: May 2002 Location: Shropshire, UK/ Lot, France Posts: 1,848	Re: Water temp sender question Thats where it is, I must be routing the wires wrong as I can't seem to sort it out so it all fits neatly. The old wiring was so badly hacked aorund not one wire was original and I was missing the brake warning light switch wire, the backup lights, all the ignition stuff was cut out and bodged due to it having a mallory twin point dizzy with the coil mounted on the bulkhead. The wire to the water temp sender had I think four different colours of cable either twisted or soldered together! so I have no idea where stuff should be routed. If anyone can post a picture a standard firewall with all the wires in place I'd be grateful. __________________ Phil '67 C10 long fleet. 350/TH350, 4 bbl Carter, K&N, Dual exhaust, loads of stuff coming soon 2001 S10 Blazer Daily Driver, bone stock 4 door 4x4 with manual transmission

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06-26-2011, 07:50 AM	#1
Lippyp English Chevy Owner Join Date: May 2002 Location: Shropshire, UK/ Lot, France Posts: 1,848	Water temp sender question I'm in the middle of rewiring my 350 with a brand new M&H engine wiring harness after finally managing to butcher out the rusted solid bolt from the firewall plug. Offering the harness up it don't seem to fit very well and then it struck me, it would fit better if the oil pressure switch was not where it is. Which side head should it be in? Its currently in the drivers side head but I can't see how with it there the wire will reach it. Should the switch be in the passenger side head as standard? __________________ Phil '67 C10 long fleet. 350/TH350, 4 bbl Carter, K&N, Dual exhaust, loads of stuff coming soon 2001 S10 Blazer Daily Driver, bone stock 4 door 4x4 with manual transmission



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