Too Cold for the TDI? - Defender Source
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  #1  
Old February 21st, 2015, 10:06 AM
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Too Cold for the TDI?

Hi All,


My 200 TDI has been sitting for the last couple weeks while I was away, and it's been a little colder than normal here as you all know. Anyway, started her up today for a quick blast through the snow. Was hard to start (even after 60 secs of glow), and made a "more pronounced" diesel clank thank normal. I have her warming up now, but curious if there are ny issues running it when it's this cold (0-10 F)? Thanks.
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  #2  
Old February 21st, 2015, 10:16 AM
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Robert Davis
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Not if you have oil pressure and the coolant is still liquid.
It will be very slow to warm up.
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  #3  
Old February 21st, 2015, 10:16 AM
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I don't think so. Getting it started is the key. Only running issue is keeping the diesel from gelling in the lines. My primary filter is a racor with a bowl heater. The heater is always powered with ignition, but the elemen in the bowl turns on automatically when the fuel is below 45F (I believe that's the temp). Should be a bit warm going back to the tank. When you go farther extreme in temps (sub-zero), then you may need fuel line heaters, tank heaters, block and battery heaters if it's sustaining cold.

But a heated filter, heated seats, synthetic oil, the right diesel mix (winter diesel), cabin insulation and a webasto are a good start to cold weather diesel prep.
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  #4  
Old February 21st, 2015, 10:25 AM
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Thanks guys. Been warming up for about 20 minutes now- and sounds about normal. Will take her for a spin and see. Thanks!
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  #5  
Old February 21st, 2015, 10:28 AM
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mine started right up yesterday am at 9F, but was an awful clatter for the first 5 minutes. came back down to a normal noise after about 15 minutes. up to normal temps after 5 minutes of driving.

TDI's starting in low temps sound just like waking kids up early on a weekend....or beagles any day of the week. But unlike beagles, they eventually quiet down.
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  #6  
Old February 21st, 2015, 10:31 AM
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Yesterday at -10 mine took a couple glow plug cycles to start it. Definitely runs rough for the first few minutes, no power, clacky. Let her idle for a while and it'll run mint.
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  #7  
Old February 21st, 2015, 11:16 AM
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Webasto is the real deal. My classic fires right up and purrs after 15-30 minute preheat. Just found a used one in ebay for the d90 as well, as the RRC was making it look bad!
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  #8  
Old February 21st, 2015, 12:17 PM
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Just got back from an hour ride. Truck ran beautifully (at least the way I think it should run), and the cab was nice and toasty, relatively speaking. Was a bit rough to start, but leveled out after about 15 minutes. I did notice a bit of a ticking sound from the engine when I got home. Sounds like leaking manifold gasket. Will check it out next weekend. Thanks for the responses guys.
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  #9  
Old February 21st, 2015, 12:20 PM
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It's always helpful to have a freeze plug/block heater installed as in the US you never know when a cold or warm winter will occur. Best to have it in place & ready to use, just plug it in or use a timer to warm it for a couple of hours before you start 'er up.
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Old February 21st, 2015, 12:33 PM
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Quote:
Originally Posted by Viton View Post
It's always helpful to have a freeze lug/block heater installed as in the US you never know when a cold or warm winter will occur. Best to have it in place & ready to use, just plug it in or use a timer to warm it for a couple of hours before you start 'er up.
And keep an eye out for small coolant leaks. You can get drips from hose clamps tightened in warm weather when the temps drop and rubber hose shrinks
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  #11  
Old February 21st, 2015, 12:36 PM
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Quote:
Originally Posted by sandman913 View Post
Thanks guys. Been warming up for about 20 minutes now- and sounds about normal. Will take her for a spin and see. Thanks!
Do not ever let it idle cold to warm it up. It is very bad for the engine. Start it and drive it to warm up.
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  #12  
Old February 21st, 2015, 12:45 PM
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Shoot! A little this time around; hopefully no damage done. Last time I do that. Thx
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  #13  
Old February 21st, 2015, 01:45 PM
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Quote:
Originally Posted by Red90 View Post
Do not ever let it idle cold to warm it up. It is very bad for the engine. Start it and drive it to warm up.
John,

Is that because you need to get the engine under load to really warm up?
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Old February 21st, 2015, 01:50 PM
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Quote:
Originally Posted by Greenbull View Post
John, Is that because you need to get the engine under load to really warm up?
Yep. 300tdi won't warm up unless there is some load. Basically you would just be idling a cold engine ... The goal should be to get it to operating temp as quickly as practical.
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  #15  
Old February 21st, 2015, 02:08 PM
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I started my Tdi up today; 18*F -no glow plugs(still havent wired them up yet).

Fired right up!

.
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  #16  
Old February 21st, 2015, 02:11 PM
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Quote:
Originally Posted by leastonce View Post

Yep. 300tdi won't warm up unless there is some load. Basically you would just be idling a cold engine ... The goal should be to get it to operating temp as quickly as practical.
With a good tstat, under load it'll be warm enough to get heat in about 5 min of driving. Idling cold as a routine will coke the pistons and turbo. Not an immediate damage issue that Im aware of
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  #17  
Old February 21st, 2015, 02:30 PM
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Magic word is webasto. Engine pre heater... Starts a -22f without any problems. Winter 'been harsh this year! Synthetic oil helps a lot. And yes the 200/300tdi need a load to warm up.
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  #18  
Old February 21st, 2015, 02:45 PM
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Quote:
Originally Posted by Greenbull View Post
John,

Is that because you need to get the engine under load to really warm up?
You get unburnt diesel in the cylinders and it gums up the rings. You want to get that first run down the block to get the combustion temperature up high enough to ensure all the diesel is burning.
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  #19  
Old February 21st, 2015, 03:31 PM
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Too Cold for the TDI?

If anyone is interested I have a Thermo top c diesel and brand new webasto fuel pump that won't be going in my truck. The only thing I don't have for the Heater is the wiring harness. The heater has been cleaned and it has new gaskets and glow pin. I was going to wait until the spring to bench test it and then put it up for sale however it's low on the priority list. PM me if you're interested.
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  #20  
Old February 21st, 2015, 03:48 PM
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Quote:
Originally Posted by flananuts View Post
If anyone is interested I have a Thermo top c diesel and brand new webasto fuel pump that won't be going in my truck. The only thing I don't have for the Heater is the wiring harness. The heater has been cleaned and it has new gaskets and glow pin. I was going to wait until the spring to bench test it and then put it up for sale however it's low on the priority list. PM me if you're interested.
wiring harness is an easily sourced part. recommend getting a proper webasto rather than aftermarket so the wire color coding is consistent with manuals.

you may also want to mention if it has the water pump or not. a C/Z can be run as an aux heater (while engine is running) or a parking heater (engine off). engine off needs the water pump. if not, it's a part that can be added.
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