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Author Topic: VW jetta question  (Read 489 times)

Offline Gunslinger

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VW jetta question
« on: July 03, 2005, 12:15:17 PM »
This is for anyone who knows or specifically anyone who is mechanicly inclined and owns a jetta.

My brother has an older one, not sure what year but it's probably at least 5 years old and has 110,000 miles on it.  It's in great condition and it's a V-6.

Ok with all the pertinant info out of the way:

Is it bad if is engine oil temp runs at 236 degrees if his coolent temp stays below 210?  

This is without running the air conditioner in high desert temps under normal driving conditions to include highway.  

He's concerned he's running his engine too hot and it's my asertion that as long as his water isn't hot or boiling over he's fine.  In addtion he has allready changed out the thermostat and did a flush and fill on the radiator.
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Offline Maverick

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VW jetta question
« Reply #1 on: July 03, 2005, 12:31:35 PM »
The coolant temp is a bit high. You should try to keep it as close to 180 degrees F as possible. Higher temps mean you have to rely more and more on pressure holding to keep it from boiling.

It may be the case that the oil cooler is a bit clogged up or blocked from airflow. How long has it been since the oil was changed? What is the oil pressure? Does either temp change or do they hold steady?
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Offline Gunslinger

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VW jetta question
« Reply #2 on: July 03, 2005, 12:37:30 PM »
Quote
Originally posted by Maverick
The coolant temp is a bit high. You should try to keep it as close to 180 degrees F as possible. Higher temps mean you have to rely more and more on pressure holding to keep it from boiling.

It may be the case that the oil cooler is a bit clogged up or blocked from airflow. How long has it been since the oil was changed? What is the oil pressure? Does either temp change or do they hold steady?


He changes his oil regularly.  I'm not sure if it even has an oil cooler (ignorant on the ways of the jetta) but I've reccomended he look into an after market one.  The temps stay pretty regular.  The water temp of 200-210 isn't all that uncommon in cars out here were we regularly see triple digit temps.  My jeep runs at 205 in the summer.

I'm pretty sure the oil pressure is constant/normal as well otherwise he would have mentioned it.
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Offline rpm

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VW jetta question
« Reply #3 on: July 03, 2005, 01:16:55 PM »
Have zero experience with a Jetta, but those temps look a bit on the high side to me. If it doesn't have an oil cooler, get an aftermarket one quick. Besides thermal breakdown of the oil, gaskets, seals, hoses, ect., don't take well to long periods of high heat.
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Offline Captain Virgil Hilts

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VW jetta question
« Reply #4 on: July 03, 2005, 01:37:41 PM »
Neither of those temps is terribly out of line. Both are SLIGHTLY high. I'd prefer to see 195 or so on the water and 210 or so on the oil. You might consider having the cooling system flushed and checked thoroughly. Also switch to a good quality pure synthetic oil, they perform and protect better at high temperatures.
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Offline Gunslinger

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VW jetta question
« Reply #5 on: July 03, 2005, 01:42:01 PM »
well thanks guys I'll relay this to my brother.

From what he told me this is the stock engine but they put in a space that was ment for a 4cyl.  Its almost a strait 6 but the cylininders are slightly offset.  

I'll recomend an aftermarket cooler
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Offline beet1e

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VW jetta question
« Reply #6 on: July 03, 2005, 01:57:23 PM »
Quote
Originally posted by Gunslinger
Its almost a strait 6 but the cylininders are slightly offset.  
GS,

I've had two cars with that same engine. The 2.8i V6. Although it's a V6, there's only one cylinder head, and the cylinders are arranged in a 15° V.

My temperature readouts were in Celsius, but the coolant temperature would always be a constant 90°C (about 195°F). In normal driving, the oil would be 96°C. But in high speed driving (140mph/225km/h on the German autobahn) the oil temp would rise to 112°C! That's almost the 236°F that your brother is getting in normal driving, and seems rather high to me. Even driving flat out with 5500rpm, I never quite ran the oil as hot as your brother is doing.
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Offline Gunslinger

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VW jetta question
« Reply #7 on: July 03, 2005, 03:54:57 PM »
Quote
Originally posted by beet1e
GS,

I've had two cars with that same engine. The 2.8i V6. Although it's a V6, there's only one cylinder head, and the cylinders are arranged in a 15° V.

My temperature readouts were in Celsius, but the coolant temperature would always be a constant 90°C (about 195°F). In normal driving, the oil would be 96°C. But in high speed driving (140mph/225km/h on the German autobahn) the oil temp would rise to 112°C! That's almost the 236°F that your brother is getting in normal driving, and seems rather high to me. Even driving flat out with 5500rpm, I never quite ran the oil as hot as your brother is doing.


thanks alot Beetle.  On his way out here he was doin 90 mph, his oil was 230-236 water: 200, and the outside temp was 99-103.

he was driving from Las Vegas through the mojavi desert.
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Offline Raubvogel

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VW jetta question
« Reply #8 on: July 03, 2005, 11:40:55 PM »
Only chicks drive Jettas. And most of the time they're pretty hot chicks. I drive 50 miles each way to work, so I've done the research ;)
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Offline Ripsnort

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VW jetta question
« Reply #9 on: July 04, 2005, 12:18:30 AM »
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Originally posted by Raubvogel
Only chicks drive Jettas. And most of the time they're pretty hot chicks. I drive 50 miles each way to work, so I've done the research ;)

Wait a minute, I was told only chicks drive 3-series...then it was Miata's, then it was...:cool:
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Offline SOB

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VW jetta question
« Reply #10 on: July 04, 2005, 12:21:55 AM »
Chicks have many choices in automobiles nowadays.  Jettas, 3-series, miatas, V6 mustangs (and up until a few years ago, the V6 camaro), and the list goes on.  Plenty of rides for the missus' of the country!
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Offline Ripsnort

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VW jetta question
« Reply #11 on: July 04, 2005, 12:28:00 AM »
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Originally posted by SOB
Chicks have many choices in automobiles nowadays.  Jettas, 3-series, miatas, V6 mustangs (and up until a few years ago, the V6 camaro), and the list goes on.  Plenty of rides for the missus' of the country!


There's a "6" theme going here...hmmm, 6..6..inches? >< ;)
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Offline Hangtime

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VW jetta question
« Reply #12 on: July 04, 2005, 12:48:22 AM »
Six POINT Six inches.

Circumfrence.
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Offline FUNKED1

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VW jetta question
« Reply #13 on: July 04, 2005, 01:16:17 AM »
Quote
Originally posted by beet1e
GS,

I've had two cars with that same engine. The 2.8i V6. Although it's a V6, there's only one cylinder head, and the cylinders are arranged in a 15° V.

My temperature readouts were in Celsius, but the coolant temperature would always be a constant 90°C (about 195°F). In normal driving, the oil would be 96°C. But in high speed driving (140mph/225km/h on the German autobahn) the oil temp would rise to 112°C! That's almost the 236°F that your brother is getting in normal driving, and seems rather high to me. Even driving flat out with 5500rpm, I never quite ran the oil as hot as your brother is doing.


Somebody asks a car question and someone else comes up with high speed test data on an identical machine, within two hours.  What a forum.  :aok

PS
112C=234F
96C=205F
I think Gunny's brother is OK.
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Offline SOB

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VW jetta question
« Reply #14 on: July 04, 2005, 01:37:29 AM »
Quote
Originally posted by Ripsnort
There's a "6" theme going here...hmmm, 6..6..inches? >< ;)

I wish!  Damn 3-series. :(
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