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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKIV-A4 TDIs (VE and PD)

VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

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Old January 17th, 2000, 07:52   #1
Beet Red
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Join Date: Sep 1999
Location: Monmouth County NJ, USA
Default Cold Starts and Engine Noise

7 degrees F this morning. Car started fine but the oil light and alarm came on briefly after startup. Is this normal? Also, the engine seemed more noisy than usual, sort of like valve tapping for about one minute. Is this due to the cold? I am using Delvac-1.

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99 NB TDI
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Old January 17th, 2000, 09:20   #2
Powder Hound
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Location: Conkud, New Hampshiyuh, USA
Fuel Economy: pretty freakin' good.
Default Re: Cold Starts and Engine Noise

Yup.

When it is really cold like that, especially when it has been sitting for a day or more, then there is extra noise from the valve train. Not much you can do but never hit the accelerator pedal. You have good oil, that is about all in your power to do.

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Always interested in steep & deep
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Old January 17th, 2000, 10:10   #3
danj
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Default Re: Cold Starts and Engine Noise

Well, you could get an oil pan or engine block heater to keep your engine and oil warm on cold nights. Do a search on the topic or try http://www.engineheaters.com/
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Old January 17th, 2000, 10:37   #4
Beet Red
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Default Re: Cold Starts and Engine Noise

Thanks for the replies... So the engine oil light and alarm is not an issue when cold? I don't mean to be a pest on this but, there is no one at my dealer to ask these questions of.

Unfortunately a block heater is out of the question for me. Can not get close enough to a receptacle and do not have a garage.

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Old January 17th, 2000, 12:49   #5
ThinkDiesel
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Default Re: Cold Starts and Engine Noise

Using a lighter weight oil in very,very cold weather can help a bit
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Old January 18th, 2000, 11:42   #6
mickey
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Default Re: Cold Starts and Engine Noise

I'm a bit concerned by your description. Synthetic Delvac 1 should flow just fine at 7 degrees. You should experience no more than a few seconds of valve ticking, and I can't see any reason why the oil warning should come on. I also have a '99 NB, and I've started in temperatures as low as 10 degrees. No light, and the valve ticking disappeared just as quickly as it does during the summer. It's possible you could have an oil pressure problem. Listen to it again tomorrow morning, very carefully. Make sure you're not confusing "valve ticking" with the normal cold weather clattering of the diesel. The valve noise is pretty subtle. As soon as the lifters fill with oil, it should stop. That shouldn't take longer than a few seconds.

This is a long shot, but do you do a lot of very short trip, stop-and-go city driving? If you put VERY few miles on your car it's possible your oil has become fouled with water condensation and there's a lot of sludge in there that's plugging things up. You'd have to be a pretty extreme case to ruin Delvac 1, though. Check your oil. Make sure the level is correct, and make sure there's no gray/white "milky" looking goo on the dipstick. Also, double-check your coolant level. If that's gone down, it's possible that you have an internal coolant leak that's fouling your oil. Again, these are long shots. I think it's most likely that you're misinterpreting what you're hearing, and that you've got a weak oil pressure sender.

-mickey
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Old January 18th, 2000, 14:25   #7
Karl Roenick
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Default Re: Cold Starts and Engine Noise

It was 2 deg F. inside the garage this am and -8 outside. The car started up great!
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Old January 18th, 2000, 14:59   #8
GeWilli
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Default Re: Cold Starts and Engine Noise

The diesel engine will make noise until it is completely warmed up. Just like it gets quieter the longer you own it (providing you put the right oil in and take care of it).

I routinely experience a louder engine noise until it is completely warmed up, nothing to worry about. In a garage your engine might not get to the 2 degrees ambient temp in only left for the night.

One thing to pay very close attention to is the RPMs. DONOT rev beyond 2500 until the temp needle has started to creap up. The glow plugs will keep working and will warm up the car faster if the RPMs are kept below 2.5k. It makes a huge difference.
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Old January 18th, 2000, 18:06   #9
ThinkDiesel
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Default Re: Cold Starts and Engine Noise

Just got back from NY.. had my first TDI COLD weather experience... One day it was just below 0, with a -15F windchill! Glow plugs stayed on for about 45-50 seconds! Longest I've ever seen! Repeated cycle twice. Cranked engine. Started right up with a small stumble and a good puff of smoke. I was happy and impressed. Man, this thing sounds like a cummins dodge pickup when its cold! People were actually staring at me when I accelerated. No mistaking this thing for a gasser when its THAT cold hehe!

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Ryan

1999.5 Jetta/Bora GL TDI
Atlantic Blue/Gray Studio
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Old January 18th, 2000, 18:22   #10
Dezl Don
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Default Re: Cold Starts and Engine Noise

Mickey's comment about synthetic oil getting gooey if run so little that it doesn't heat up well is accurate.

A friend of mine had this happen in his BMW when he was running Mobil 1. He had the car towed to the dealer, thinking he had blown a head gasket. Not so. Mobil's comment was to make sure he drives the car enough at least weekly in the cold weather to really heat up the oil. This will evaporate the moisture out of the oil and the goo will be gone.

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Old January 19th, 2000, 08:37   #11
Beet Red
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Default Re: Cold Starts and Engine Noise

Mickey,
I have heard the valve ticking again.
Monday, 7 degrees, oil light comes on with valve ticking.
Tuesday, 5 degrees, no oil light, valve ticking for about 45 seconds.
Wednesday, 15 degrees, oil light comes on, valve ticking for about 30 seconds.

I drive 17 miles (each way) to work. I do on occasion make short trips (under 5 miles) and turn the car off. At least once per week though i will run it for at least an hour or so at highway speed.

Just so you know, the dealer overfilled my car at the 5000 mile service. The oil level was 1/2" above the top line (crosshatched area) on the dipstick. The excess oil has been drained but the car was operated for 1200 miles when overfilled. Could this be the reason for my oil pressure problems?

I really appreciate your help on this, there is no one in my area (including the dealer) who seems knowledgeable on this engine.

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Old January 19th, 2000, 08:52   #12
Karl Roenick
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Default Re: Cold Starts and Engine Noise

I didn't know that about the coolant glow plugs. Was that info in the manual? I don't remember reading it, but I might have just missed it.
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Old January 19th, 2000, 09:16   #13
Beet Red
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Default Re: Cold Starts and Engine Noise

Karl,
I have been using the PowerService (from Wal*Mart)supplement for the past few tanks and have not experienced any starting or driving problems. I add 4 ounces (think that is the correct ratio) to approximately 12 gallons of fuel. I have been using Coastal diesel fuel from a local dealer who seems to sell quite a bit of it. He told me it is a 50/50 blend?

I seem to be having some oil pressure problems. Have you seen your oil light come on just after start up?

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Old January 19th, 2000, 09:28   #14
TDI Steve
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Default Re: Cold Starts and Engine Noise

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by mickey:
This is a long shot, but do you do a lot of very short trip, stop-and-go city driving? If you put VERY few miles on your car it's possible your oil has become fouled with water condensation and there's a lot of sludge in there that's plugging things up.

-mickey
<HR></BLOCKQUOTE>

Well now i'm slightly scared.... i do extremely short trips to school right now (1 or 2 minutes of driving) repetitively....
the weather is around 15 degrees, give or take 10. Am I in for trouble? I still have factory oil and 1500 miles so far.

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Please excuse lack of knowledge... it goes along with lack of experience...
1st car: 2000 Golf GL TDI /w Auto
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Old January 19th, 2000, 09:35   #15
Karl Roenick
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Default Re: Cold Starts and Engine Noise

When it gets down to -8 deg F, weird things happen I guess. My oil light has never gone on. Don't you love the instrumentation in the NB's. I think it might be interesting to monitor the fuel temp, which is an accessible parameter of the ecu.

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Yellow 2000 Beetle
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