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Mod | | | Forums66 Topics128,022 Posts1,055,384 Members48,422 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Jul 2015 Posts: 28 Wrench Fetcher | | Wrench Fetcher 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 Shop Shark | | Shop Shark 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 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2015 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 'Bolter | | 'Bolter Joined: Aug 2009 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
| | | | | Joined: Jul 2015 Posts: 28 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2015 Posts: 28 |
Now the proud owner of a '51 Chevy 3100
| | | | | Joined: Jun 2012 Posts: 1,747 'Bolter | | 'Bolter 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 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2015 Posts: 28 | 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 Shop Shark | | Shop Shark Joined: Jan 2010 Posts: 4,263 | 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 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2015 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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