Author Topic: 1949 chevy 4100: shop rod 2.0  (Read 9882 times)

mr.mindless

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Re: 1949 chevy 4100: shop rod 2.0
« Reply #30 on: May 16, 2018, 10:10:58 AM »
I think that's what was done for the old mechanical gauge's sender on my last motor. my Acutech SMI gauge came with a proper threaded sender for the LS head, so I didn't go through this recently. I wouldn't feel bad about tapping out a hole though.
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oh lord!

M4wdFab

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Re: 1949 chevy 4100: shop rod 2.0
« Reply #31 on: May 16, 2018, 10:42:11 AM »
i have done it a few different ways

Matts car we sourced the correct metric thread adapter that his sender fit in (paper thin bushing)

most of our cars, a 1/4" npt tap has been run into the very close metric tap on the passenger head where the plug is. (oem sensor on driver side head).  no problems on 4-5 motors.

on the hot rods i am a little lazy and i pull the heater core nipples out of the water pump.  holes left are perfect size to run a 3/8" npt and 1/2" npt tap.  on the race cars they get brass plugs, on hot rods i put the sensor in the front one, done.  not best place but lets you know abnormal temp if occurs.   

M4wdFab

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Re: 1949 chevy 4100: shop rod 2.0
« Reply #32 on: May 16, 2018, 10:44:47 AM »
if your worried about thread chips beyond a bunch of greese on the tap, put some compressed air on the steam port nipple (coolant drained) to force chips out with positive pressure.  same way i tap the stupid vents on TH400s, air pressure on pump vent to force chips away from pump

wnyjpgy

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Re: 1949 chevy 4100: shop rod 2.0
« Reply #33 on: May 16, 2018, 10:47:34 AM »
Thanks for the info.

I planned on taking my 1/4" npt tap to the hurt old head I have so see how it went.

I assume you didn't even bother drilling it since it's very close?

I have the adapter with the correct thread from autometer like Matt used, but it has a smaller diameter sensor that fits in it. It also came with instructions not to drill out for the other sensor since it get too thin.. Sounds like you guys made it work though.

Unfortunately my heater hoses are hooked up, so that's not an option.

I'll probably just run my tap in the passenger side port..

wnyjpgy

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Re: 1949 chevy 4100: shop rod 2.0
« Reply #34 on: May 16, 2018, 10:49:46 AM »
I'm not too concerned about the chips, I've tapped steering boxes assembled without issue doing in carefully, I would probably do the same thing here.

My gauge works, just the range is off.. It's on my remaining short list to address.

M4wdFab

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Re: 1949 chevy 4100: shop rod 2.0
« Reply #35 on: May 16, 2018, 11:05:00 AM »
no drilling for 1/4"

unless you really fuck up and then drill it out for 3/8" NPT


now that i think about it, that was done on one of matts motors, but i think his fancy gages had a smaller sender that fit in the supplied adapter. 

M4wdFab

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Re: 1949 chevy 4100: shop rod 2.0
« Reply #36 on: May 16, 2018, 11:08:41 AM »
some other good info, for your oil pressure- if you get an oil cooler delete plate (OEM for any 1/2 ton above the oil filter) the cast hole is correct size for 1/8" NPT tap.  you just have to take a 3/16" drill bit and though to the pressure side before running a 1/8npt tap in. 

works mint.  good for esender or copper mechanical line

wnyjpgy

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Re: 1949 chevy 4100: shop rod 2.0
« Reply #37 on: May 16, 2018, 03:54:02 PM »
I did something similar for oil.

Wingman

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Re: 1949 chevy 4100: shop rod 2.0
« Reply #38 on: May 18, 2018, 06:19:06 PM »
Retired

mr.mindless

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Re: 1949 chevy 4100: shop rod 2.0
« Reply #39 on: May 18, 2018, 08:38:16 PM »
seems like a good stock item? :)
Quote from: etk300ex
oh lord!

M4wdFab

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Re: 1949 chevy 4100: shop rod 2.0
« Reply #40 on: May 18, 2018, 09:33:02 PM »
man add that to like 5 this week local i could have bought.  o well. 

M4wdFab

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Re: 1949 chevy 4100: shop rod 2.0
« Reply #41 on: May 19, 2018, 09:40:21 AM »
front bumper and bumper trim mounted last night
started working on side steps
more wiring and maybe trans linkage today.

didnt see a PCM yet. 

gif

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Re: 1949 chevy 4100: shop rod 2.0
« Reply #42 on: May 19, 2018, 09:56:48 AM »
Look at this big boy...

https://williamsport.craigslist.org/cto/d/53-gmc/6590122736.html

i like it.  i wonder if it will fit on my trailer..

« Last Edit: May 19, 2018, 09:59:43 AM by gif »

M4wdFab

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Re: 1949 chevy 4100: shop rod 2.0
« Reply #43 on: May 19, 2018, 11:44:16 PM »
side steps done and got a shifter hooked up on dash
hood latch and catches fixed
front chevy emblem mounted
driver side mirror mounted

M4wdFab

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Re: 1949 chevy 4100: shop rod 2.0
« Reply #44 on: May 21, 2018, 07:59:29 AM »
id say 90% of wiring done

running out of things to do waiting on delivery of:

PCM
Muffler
new 12v headlights
horn
3 way flasher
glass and glass seals
headliner