(800) 853-2651
SHOP NOW

Ever seen 4 glow plugs go at once?

P

Pat-CT

Well-known Member
Okay tuesday I went to start the B-275 and heated the glow plugs for 30 secs and spun the engine over and it fired right up. let it run for about 10 minutes then shut it off(first start of the year and then decided to change the oil) well tuesday I went to start it and nothing wouldnt pop or anything. So my question is has anyone ever had all 4 glowplugs go out at once. And if the switch got stuck inside somehow wouldnt it have killed the battery?
 
I realise that, But when i took them out every single one of them was bad. Its the strangeist thing....
 
It doesn't seem possible unless they were wired incorrectly. OEM has five hooked in series. Four in the engine and the other that works as an indicator in the dashboard. If any one of them blows, power is cut to all the rest. So, for four to blow when hooked up that way, they would all have to blow at exactly the same moment.

Those glow plugs are designed to run on less then one volt each (9/10ths of a volt to be exact). Having five in series keeps the voltage down low. If the wiring was changed and enabled a higher voltage to touch any of them, they'd blow instantly.
 
Its the strangeist thing ive ever seen. no wireing was changed. Everything worked fine the day before. Then all of the suden POOF none of them work. Its the weirdist thing. I check them with a test light and hooking 12v to them, They are 12v and have no resistor etc ....wired stright from battery stock. Kind of funny at napa today .... he had to cross the glowplugs like 3 times to find a match
 
There was nothing wrong with the plugs, until you hooked them to 12V. That's when they blew.

You really only had one bad plug, but you ruined the rest testing them.
 
(quoted from post at 19:22:32 03/19/10) There was nothing wrong with the plugs, until you hooked them to 12V. That's when they blew.

You really only had one bad plug, but you ruined the rest testing them.
Click to expand...

I know nothing about these glow plugs, but when testing them in my Powerstroke you CAN NOT do that. The only way to test a glow plug or any other heating element is by reading the resistance (In Ohms - The upside down horseshoe on the DMM)
 
Well hold on, I tested them actually with the power source of the glowplugs, The actuall wire that ppowers the glow plugs, Did i still blow them all? I also checked them with a test light before that with a test light and nothing happended?
 
(quoted from post at 22:36:19 03/19/10) Well hold on, I tested them actually with the power source of the glowplugs, The actuall wire that ppowers the glow plugs, Did i still blow them all? I also checked them with a test light before that with a test light and nothing happended?
Click to expand...

A test light wouldn't do anything bc there is no power source going to the gp. You would need to use a MM and read continuity or even better resistance.

Not real sure about the tractor wiring thing, but it doesn't sound like sound procedure if they are wired in series. They would all need to be in place for the circuit to get hot.
 
Not true. Especially with thermally-protected glow-plugs like Ford uses. Made by Beru and stuck into Motorcraft boxes.

Typical Powerstroke ZD-11 glow plugs is easily tested by feeding full voltage to it through an amp-meter. Pluges are wired in parallel and all get full system voltage.

Should draw 7.5 amps and when hooked to 12 volts, heats up to working temp in 7-9 seconds.

On the other hand, the plugs used in the IH B-275 and IH B-414 are only rated at 9/10ths of one volt and MUST be hooked in series and all five must be in the system. Four in the engine and one on the dash.
 
Those plugs are only rated at 9/10 ths of one volt each. If you hit any of them with 12 volts they will blow up instantly.

The system is designed to have five of them all hooked in series. Four in the engine and one on the dash. Each has the same resistance and having five hooked in series keeps the voltage down to safe limits (rarely higher then 2 volts).

Same plugs are used in many old Mercedes cars and Mercedes Thermoking reefer engines.

Champion: CH28 (155). Bosch: 0250001001 or 0250001010, Lucas: DS104 Beru: 214GK

Thread Size:M18 x 1.50
Type of Terminal:Thread
Hex Size: 13/16"
Electrical Rating: 0.9V; 36W
 
Hi Pat, follow what the others have told you and you will be right. Also clean up your connecting wires between the glowplugs and the end one going to the timing case. I have got a new plug here and it has .9 volt stamper on it. MJ
 
Thats the weridist thing, I guess there must be a resistor somewhere under the dash board or something. Well thanks for the good info. I tested the glowplugs with the glow plug live wire from the switch. Im not sure if thats what did it or what. I got all new ones today so well see what happens
 
Each plug IS a resistor. So, there are five resistors all hooked in a row (in series). So total resistance is fives times that of one glow plug. The glow-coil that's in the dash-board has the same resistance value as the glow plugs in the engine. That so it heats up at the same rate and acts as an indicator to show you how hot the plugs are.
 
You must log in or register to reply here.

Similar threads

D
Repairing glow plug/starter switch wiring farmall 504
Replies
18
Views
581
BarnyardEngineering
BarnyardEngineering
C
International B275 Glow Plug Resistors Element.
Replies
10
Views
709
Parity's Radicle
P
O
Odd running problem
Replies
16
Views
960
cjunrau
C
H
John Deere 855/856 hard starting
Replies
7
Views
455
buickanddeere
B
J
IH B275 Glow Plug troubleshoot
2
Replies
21
Views
3K
JoeV1973
J
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top