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#1124573 09/17/2015 1:01 AM
Joined: Jul 2015
Posts: 28
B
Wrench Fetcher
Wrench Fetcher
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Joined: Jul 2015
Posts: 28
Hi,

I have just received some nice shiny new gauges and am looking for a bit of help.

The oil pressure sender unit, and the temp sender unit don't appear to fit anywhere on the engine. I haven't looked yet to see if the speedo sender fits! Has anybody fitted these before that can point me in the right direction?

I have a '51 3100 pickup with a 3.9l straight six.



Now the proud owner of a '51 Chevy 3100
Joined: Apr 2014
Posts: 924
U
Shop Shark
Shop Shark
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Joined: Apr 2014
Posts: 924
...heck, I'll try to help:

The oil pressure sender unit's sending apparatus (mech or electrical) should thread in to the bottom portion of the engine on the driver's side. Looking at the engine, with the fan on your left, and the cab on your right, the location of connection is about 25 cm from the rear of the engine, and 10 cm from the top of the oil pan. There is a "t" shaped fitting located there, usually. It should connect.

The temperature sending unit connects to the temperature sender threaded into the cylinder head. This is at the rear of the cylinder head, when viewed from the front at the fan. It may be shiny brass.

The speedometer cable connects to the transmission.

Brad


Wrench Fetcher, PhD
Joined: Jul 2015
Posts: 28
B
Wrench Fetcher
Wrench Fetcher
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Posts: 28
The temp sender is too big to fit in the same place as the old one, and the instructions say it should be mounted in the intake manifold?!


Now the proud owner of a '51 Chevy 3100
Joined: Aug 2009
Posts: 152
O
'Bolter
'Bolter
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Posts: 152
it sounds as though the instructions are for a V8 powered truck.


Oldbolter
1959 Apache 3800 dually flat bed/dump with 261
1956 3800 dually flat bed/dump with 235
1957 3600 flat bed, 350 engine, 700R4, PS, disc brakes, 14 bolt rear with 4.11 gears
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B
Wrench Fetcher
Wrench Fetcher
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Posts: 28
I thought as much!!


Now the proud owner of a '51 Chevy 3100
Joined: Jun 2012
Posts: 1,747
S
'Bolter
'Bolter
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Joined: Jun 2012
Posts: 1,747
Hot water on a V8 use the intake(or the thermostat housing). Hot water on an inline 6 use the head. Adapting a bigger fitting into the head can be frustrating. I have removed the base fitting from the head(not a lot of fun) only to find it is still too small for some Temp senders. With no way to remove the fitting from the gauge capillary(nice big word for ya to think about) You may find it is time to get a replacement Gauge for the brand new one you have already. Not the most fun you can have.


Steve H
Joined: Jul 2015
Posts: 28
B
Wrench Fetcher
Wrench Fetcher
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Can I not just get a new sender that is the right spec for the straight 6?


Now the proud owner of a '51 Chevy 3100
Joined: Jan 2010
Posts: 4,263
D
Shop Shark
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What year engine?

What ohm reading gauge?

What size threads in the head?

Can you link the gauge kit you purchased?

Pics?

Joined: Jul 2015
Posts: 28
B
Wrench Fetcher
Wrench Fetcher
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Posts: 28
I'll have a look tomorrow and try and work out what engine it is and get back to you.


Now the proud owner of a '51 Chevy 3100

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