RonJitsu
Veteran Member
- Joined
- Oct 19, 2009
- Location
- Central NJ
- TDI
- 2005 Mercedes Benz E320 CDI, 1/2 of a 1985 Jetta 1.6 Diesel
Looks nice. I assume the install will be the project for today?
1985 rebuld
- Thread starter AWPGTI
- Start date
AWPGTI
Veteran Member
Going to temporarily install it today and see what kind of readings we get.... I'm also planning on changing the trans fluid...
RonJitsu
Veteran Member
- Joined
- Oct 19, 2009
- Location
- Central NJ
- TDI
- 2005 Mercedes Benz E320 CDI, 1/2 of a 1985 Jetta 1.6 Diesel
I stopped by Dougs place earlier. He was in the middle of the water temp gauge.... Any updates on the outcome Doug?
AWPGTI
Veteran Member
I was able to get the gauge in but more questions have been raised.... I thought the stock temp gauge was on the right side of the head (blue and white) wire on a hose leading in to heater core... I was able to get a temperature reading from this but it wasn't where the factory temperature gauge gets its reading from... Basically my question is what is the difference between the two...
Here is the sender on the right side of the head
Here is the sender on the front where the factory temperature gauge gets its reading from had a (red/yellow)
Here is the gauge being installed wires ran through the fire wall... Just a reminder I didn't get the gauge cup just yet but this is the location I'll be mounting it up to..
After sitting at idle for about 30min temperature started getting to a somewhat respectable value... Tomorrow will be a true test with my 50 plus mile trip to work
Here is the sender on the right side of the head
Here is the sender on the front where the factory temperature gauge gets its reading from had a (red/yellow)
Here is the gauge being installed wires ran through the fire wall... Just a reminder I didn't get the gauge cup just yet but this is the location I'll be mounting it up to..
After sitting at idle for about 30min temperature started getting to a somewhat respectable value... Tomorrow will be a true test with my 50 plus mile trip to work
AWPGTI
Veteran Member
Also switched out the transmission fluid... Subconsciously car always runs smoother after lol
AWPGTI
Veteran Member
Temperature got up to about 140-150°F on the 50+ mile trek... That's low however needle points strait down...
AWPGTI
Veteran Member
I found the answer to my question from 4crawler site.. Copied to give info
The glow plug relay is the heart of the glow plug system. It gets input from a temperature sensor on the cylinder head which it uses to adjust the duration of the glow plug pre-heat cycle depending on the engine's temperature. Longer when cold, shorter (or not at all) when its warm (or hot). The sensor it located on the heater hose fitting on the end of the cylinder head. It should be a brass sensor with a single connector stud on the end, screwed into the body of the fitting. In fact, you should actually have two such sensors, the other one is used for either the coolant temperature gauge (or idiot light) on the dash. An obvious question arises, which is which and what happens if they are mixed up?Well, it sort of depends. On some early VW diesels (maybe through 1984), the senders are different. If you have only an idiot light, you can tell its sensor easily by use of an ohm meter. The sensor will probably read open when cold and then close when hot (to turn on the idiot light). The glow plug sensor will register some resistance (between 100-200 ohms when cold). If you have a temperature gauge, its sensor will register a higher resistance at any given temperature than the glow plug sensor, probably 500-1000 ohms when cold. If you get the two mixed up, you'll find the glow plug relay may cycle on and off after starting before the coolant heats up. Since the other sensor registers higher resistance, the relay is thinking it is *really* cold. You may also get the little yellow glow plug light blinking on and off. (Both of these symptoms happened to me with switched sensors).On later VW diesels (around 1985) the two sensors (assuming you have the temperature gauge) are identical and both measure about 1000 ohms. So if you have this type of vehicle, you can't mix up the sensors.Finally, on some of the latest VW diesels, the glow plug temperature sender is now a simple on-off device. According to the*Bentley '85-'92 Jetta Diesel manual, the glow plug sender should be closed below 50°C coolant temperature and open above that temperature.So, what does this all mean? It means there are lots of combinations of temperature senders and probably glow plug relays to go with them. I've found some glow plug relays are very sensitive to the temperature sender input resistance. Others tolerate a wide range of resistances (they are probably a later design). Best bet is to find a relay design that works and stick with it. If you experience "weird" glow plug problems, this is just one more variable you'll need to address.
The glow plug relay is the heart of the glow plug system. It gets input from a temperature sensor on the cylinder head which it uses to adjust the duration of the glow plug pre-heat cycle depending on the engine's temperature. Longer when cold, shorter (or not at all) when its warm (or hot). The sensor it located on the heater hose fitting on the end of the cylinder head. It should be a brass sensor with a single connector stud on the end, screwed into the body of the fitting. In fact, you should actually have two such sensors, the other one is used for either the coolant temperature gauge (or idiot light) on the dash. An obvious question arises, which is which and what happens if they are mixed up?Well, it sort of depends. On some early VW diesels (maybe through 1984), the senders are different. If you have only an idiot light, you can tell its sensor easily by use of an ohm meter. The sensor will probably read open when cold and then close when hot (to turn on the idiot light). The glow plug sensor will register some resistance (between 100-200 ohms when cold). If you have a temperature gauge, its sensor will register a higher resistance at any given temperature than the glow plug sensor, probably 500-1000 ohms when cold. If you get the two mixed up, you'll find the glow plug relay may cycle on and off after starting before the coolant heats up. Since the other sensor registers higher resistance, the relay is thinking it is *really* cold. You may also get the little yellow glow plug light blinking on and off. (Both of these symptoms happened to me with switched sensors).On later VW diesels (around 1985) the two sensors (assuming you have the temperature gauge) are identical and both measure about 1000 ohms. So if you have this type of vehicle, you can't mix up the sensors.Finally, on some of the latest VW diesels, the glow plug temperature sender is now a simple on-off device. According to the*Bentley '85-'92 Jetta Diesel manual, the glow plug sender should be closed below 50°C coolant temperature and open above that temperature.So, what does this all mean? It means there are lots of combinations of temperature senders and probably glow plug relays to go with them. I've found some glow plug relays are very sensitive to the temperature sender input resistance. Others tolerate a wide range of resistances (they are probably a later design). Best bet is to find a relay design that works and stick with it. If you experience "weird" glow plug problems, this is just one more variable you'll need to address.
RonJitsu
Veteran Member
- Joined
- Oct 19, 2009
- Location
- Central NJ
- TDI
- 2005 Mercedes Benz E320 CDI, 1/2 of a 1985 Jetta 1.6 Diesel
That explains why the glow plug light stayed on so long after we pulled that wire off the sender!!
AWPGTI
Veteran Member
Yes it does......
Chris
Veteran Member
- Joined
- Jan 27, 2000
- Location
- Bloomfield Hills, Michigan, USA
Needle points straight down?
What does mean?
Did you find the temperature going down during any part of your drive?
AWPGTI
Veteran Member
Ohh the needle pointing down was referring to the factory temperature gauge....
The temperature held true at 150°F the entire trip... But the factory gauge is saying this is normal correct operating temperature.... So I'm curious if something needs to be done to raise the temperature, and I suspect that I'll have greater MPG if I do, because it will be more efficient. one reason for the low temperature could be the amount of oil I'm running with the bypass setup aprox 8 quart...!!
The temperature held true at 150°F the entire trip... But the factory gauge is saying this is normal correct operating temperature.... So I'm curious if something needs to be done to raise the temperature, and I suspect that I'll have greater MPG if I do, because it will be more efficient. one reason for the low temperature could be the amount of oil I'm running with the bypass setup aprox 8 quart...!!
mbatzel
Veteran Member
Lookin good man! Can't wait to see the gauge in person. When are we scheduling another day in the body shop?
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
AWPGTI
Veteran Member
Soon... Very soon
AWPGTI
Veteran Member
hought I'd update, I got a few bits and pieces for the jetta....
This little guy will allow me to mount two sending units to the same port, it's a M10x1 fitting and will allow me to run both my vdo temperature gauge and factory gauge at the same time...
This is the vdo mount for the gauge being installed tomorrow.... Check back for updates....
This little guy will allow me to mount two sending units to the same port, it's a M10x1 fitting and will allow me to run both my vdo temperature gauge and factory gauge at the same time...
This is the vdo mount for the gauge being installed tomorrow.... Check back for updates....
AWPGTI
Veteran Member
I was able to get the new gauge pod all mounted up. The able with the new sender works great. The gauge reads 192°F perfect.... We had another great mile stone today 25,000 miles...... I ordered up a suspension refresh kit it comes with Tie Rod Ends: Ball Joint Kit: Front Control Arm Bushings (rear): Front Control Arm Bushings (front). I also have front bearings to change and a complete rear drum swap... Stay tuned for a ton of new updates!!
25k
25k
RonJitsu
Veteran Member
- Joined
- Oct 19, 2009
- Location
- Central NJ
- TDI
- 2005 Mercedes Benz E320 CDI, 1/2 of a 1985 Jetta 1.6 Diesel
Looks great! BUT you forgot to mention that Uncle Ronnie supervised !
mbatzel
Veteran Member
Doug it does look awesome, no thanks to Uncle Ronnie. We all know he did ZERO work and the supervision was at a minimum at best
Sent from my iPhone using Tapatalk
AWPGTI
Veteran Member
He's just moral support at best lol
mbatzel
Veteran Member
Even that is questionable haha. He isn't exactly the "supportive" type.
In other news...keep your fingers crossed and say a nice lil prayer for me. Might be FINALLY joining the TDI family this weekend. Let you know how it goes...
Sent from my iPhone using Tapatalk
AWPGTI
Veteran Member
Hello all I've been out of town for a few weeks, but I'm back now. Thus work can begin again on the jetta. While I was away a part I ordered from the father land has arrived. It's a "DIN" sized spot filler... Oem part number 5Z0 857 231. I can't figure out what vehicle it came from but I plan on cutting holes for the three gauges in my dash. As you can see from the pictures my current setup is sloppy to say the least...
RonJitsu
Veteran Member
- Joined
- Oct 19, 2009
- Location
- Central NJ
- TDI
- 2005 Mercedes Benz E320 CDI, 1/2 of a 1985 Jetta 1.6 Diesel
I'm so proud. Your doing something the right way without me having to force you!
bhtooefr
TDIClub Enthusiast, ToofTek Inventor
What an odd part - it's from a VW Amarok, Fox (the Lupo replacement, not the Fox we got here), or Spacefox (Fox-based mini-mini-minivan).
AWPGTI
Veteran Member
Isn't that really something.. Very interesting.. Came straight from Germany
bhtooefr
TDIClub Enthusiast, ToofTek Inventor
From Brazil to the US via Germany. 
Chris
Veteran Member
- Joined
- Jan 27, 2000
- Location
- Bloomfield Hills, Michigan, USA
My '80 Rabbit (with instrumentation package) had the oil temp and voltmeter that you show. I think the late 70's Scirrocco had all three.
AWPGTI
Veteran Member
Yes the gauges are from an old audi I believe.. And the current gauge holder is from newsouth
mbatzel
Veteran Member
Lookin good man! Can't wait to see it all finished and in person...
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
AWPGTI
Veteran Member
I heard you hot urself a diesel Mbatzel?
mbatzel
Veteran Member
Haha well then you heard right!! Uncle Ronnie took er for a spin last night and was beyond impressed with the purchase. I have a few things we need to do to get her workin like a gem but they are all minor. I mean, who really needs a radio when you can listen to the turbo haha
Sent from my iPhone using Tapatalk
mbatzel
Veteran Member
Oh and I started my own thread over in the Jetta Pics section if ya wanna check Smokey out before seeing her in person
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk