engine block heater - PeachParts Mercedes-Benz Forum

minsk · #1 01-06-2014, 03:34 PM

so it turned out i had a poopy battery.
got a new one from autozone H8-AGM.
$165.00 ugh
it was 5° here today.
she fired right up no issues.
wweeeee.

now tho pesky power locks

EDIT: no problem starting at -2° also. god, i hate the cold weather tho.

dubadxx · #2 01-08-2014, 10:57 AM

Quote:

Originally Posted by minsk

so it turned out i had a poopy battery.
got a new one from autozone H8-AGM.
$165.00 ugh
it was 5° here today.
she fired right up no issues.
wweeeee.

now tho pesky power locks

EDIT: no problem starting at -2° also. god, i hate the cold weather tho.

Got the Bosch 49-850B at PepBoys, out the door for $98.36. 20% off online order minus another $15 core charge. 36 mos free replacement, etc.
Still need to get my lower rad heater installed. Should've had my shop do it last week when I had the valves adjusted and my oil leaks fixed.
I still need a decent starter and winter oil. I diluted the Rotella 15w40 with Marvel Mystery Oil and it seems to thin it out. Still getting a long, hard start below zero, afraid it's going to kill the starter. Tooo cold to check glows, but they were changed in '09, prolly a couple are dead.
This is the '84 300d I had shipped to me in Cincinnati from Portland, OR back in sept.

funola · #3 01-08-2014, 11:57 AM

Quote:

Originally Posted by dubadxx

Tooo cold to check glows, but they were changed in '09, prolly a couple are dead.
This is the '84 300d I had shipped to me in Cincinnati from Portland, OR back in sept.

Gett yourself one of these:

RadioShack True-RMS Digital Clamp-on Multimeter : Multimeters | RadioShack.com

Make sure all lights and accessories are off. Turn glows on while some one watch the meter (readings will drop as the plugs get hotter). If you have 5 working glow plugs you should get an initial reading of around 100 amps. If you get initial 80 amps, one glow is out, 60 2 are out etc.

Here is mine (92.8 amps) clamped around the battery ground cable approx 3 seconds after glow started, which tells me all 5 glow plugs are drawing the correct amount of current and none are burned out.

funola · #4 01-08-2014, 12:06 PM

Many report not working block heaters due to missing cord or possibly a bad cord. I'd suggest checking the heater at the connector with an ohmmeter first. Chances are it is still good (a good heater should be 36 ohms for a 400W heater). From what I've read, replacement cords are hard to find. A way around that is get a cord from an old cloths iron or toaster and crimp on terminals that fit the block heater and glue it in with RTV. Strain relief it so it doesn't get yanked off.

funola · #5 01-08-2014, 12:37 PM

This is the block heater plug on my 85. It was under the bumper with the cover on when I found it. I don't think the PO ever used it or knew of it's existence since it was always garaged and they didn't drive it much in the winter.

whunter · #6 01-08-2014, 12:44 PM

Let's Wire Up the Block Heater!

NAPA cord PN: 28450
NAPA AUTO PARTS

This looks suspiciously familiar.

Replacement Block Heater Cord, 251919, Fleetguard Cummins - Ryder Fleet Products

https://www.google.com/search?q=Fleetguard+Replacement+Block+Heater+Cord+251919&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US

fficial&client=firefox-a

.

funola · #7 01-08-2014, 12:59 PM

This is not my pic. I found it on the block heater plug removal thread. Is this the Mercedes block heater that is installed in the block? Does anyone have a pic of it unistalled? It is supposedly made out of brass and is beautifully made.

whunter · #8 01-08-2014, 01:38 PM

Quote:

Originally Posted by funola

This is not my pic. I found it on the block heater plug removal thread. Is this the Mercedes block heater that is installed in the block? Does anyone have a pic of it unistalled? It is supposedly made out of brass and is beautifully made.

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