GTI 337/20th Anniversary :: Radiator Malfunction - Hot On The Top Half And Cool At The Bottom


Jun 21, 2015

So basically a couple months ago I picked up a 03 20th and GTI, I love the thing to pieces, recently I've got into drive it and I can watch my temp gauge steadily climb to 90 and stop. (before I go any further, I haven't gotten any overheat warnings or anything like that, I've just noticed my car is really hot all the time and the temp gauge goes to 90 within a minute or so of driving but doesn't go over). heat works fine, I've gone in the engine and tested a few things, tested the fans by jumping the connections, my large fan is dead but the small works fine. to my understanding, the large fan isn't used much unless it's really hot anyway. so I removed it and continued trying to find my problem, I felt the rad after letting the car run for a bit, the top half was hot but the bottom half was cool, took the hoses off and flushed my rad thinking maybe something was clogging it, water ran through fine, so I put it back together, put new coolant and tried again. same thing. so I took it for a rip and came back, obviously, the top hose and the rad were hot, but the bottom one was kinda warm. I looked for answers online but I can't seem to find anything like what I'm dealing with. the water pump seems to be working fine, I'm not sure how much flow is supposed to be coming through the Small hose at the top of the reservoir, But I checked it and it has a steady stream coming out of it. I've worked all the air out of the lines as well. The car isn't overheating and doesn't really pass the 90 mark, fans almost never come on but the small one kicks into low when I turn the AC on. which as far as I'm aware is what's supposed to happen.

The car feels like its running hot, checked everything I can think of. rad is hot on the top half and cools at the bottom, coolant has a steady flow back to the reservoir. no actual overheat warnings, I'm just wondering if these cars run hot normally or if I should be concerned.

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GTI 337/20th Anniversary :: Car Give Some Gas To The Bottom To Take Power

I have a 2004 GLI, with 105,000 miles

I have a problem, I think it's a leak in the turbo, when I drive at 45 or 50 mile four-speed when I give some gas to the bottom to take power, I feel that the car starts to shake and feels like coughed at the same time and the Check Engine starts to blinking.

I change the timing belt, valves, and ignition coils.

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GTI 337/20th Anniversary :: Car Sputters Around Half Throttle / 10 PSI

Yesterday, I was taking off from a light and noticed that when I got around 10 PSI, the car kind of nosed over and sputtered. So I started to play around and discovered that no matter what gear, this always happened between 7-12 PSI of boost. Normal driving for me is shifting around 3k RPM, about half throttle. Sometimes when I shift, it pops. Not like a normal, chipped car pop but not quite loud enough to be a backfire.

I took my dad out in the car and got to 55 MPH, then held the throttle half way to keep boost around 10 PSI and it would start sputtering/bogging down erratically. Any more then 12, and the car is fine. Any less then 7 and the car is fine. He suggested a Throttle Position Sensor that has a dead spot in it.

Here's some thought from me:

Coils/Misfires - If it were a coil or misfiring, it would be all the time, not just what I described above, correct?

Boost Leak - At WOT, the car gets up and goes while holding steady boost.

Vac Leak - I've been told at idle, the car is supposed to have 19-21 in Hg of vacuum. It's at 20.

If you turn your speakers up, you can actually hear the exhaust gurgling in the video when I hit the spot I am talking about. There are no loud noises, so don't worry about maxing them. I had to.

[URL] ...

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GTI 337/20th Anniversary :: Cranked Half Way Started And Shut Down

So I was wondering, what my problem might be. I went to go start my car after work 3 days ago and it cranked half way started and shut down. The things that I have checked are fuses both at the battery and in the side panel, fuel pump relay... It clicks when I turn the key, fuel pump.. Its getting 12 volts when the key is in the on position. Now a buddy of mine had me roll down the driver window and arm the alarm then open the door from the inside and the alarm did not go off nor does the dome lights come on. And the the fuel pump does not prime. He told me its a food lever switch. It's not recognizing that the door is open and that it's linked with the fuel pump that's why it's not priming and it's not starting.

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GTI 337/20th Anniversary :: Clutch Pressure Low - When Pushed Only Come Back Up Half The Way

Started losing pressure on my clutch pedal yesterday. When I would push in the clutch pedal it would not push back up to the reset position. It would only come back up half the way. Now today I have a steady ABS light and ASR light on. Checked for fault codes and found no trouble code. Checked brake fluid resevoir for leaks; still has plenty of fluid. Checked slave cylinder bleeder valve for leaks and looks dry. The only thing I think it could be is the clutch master cylinder. If I drive the car for a few minutes I am able to build pressure back up in the clutch, however the ABS light and ASR light still remain while driving. Turning the car off and back on again shuts off the light for a few minutes until I start driving, but the clutch pressure starts back low again.

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GTI 337/20th Anniversary :: 2004 1.8T - Half Throttle Boost / Little Hesitation At 5 PSI

I have a 04' Jetta 1.8T (AWP) my mods are APR Chip (91octane program) Forge 007 DV, APR TIP, NGK spark plugs, catback exhaust. This issue I am having pretty much started when i got it chipped and I've got it reflashed and I've even talked to people at APR and they are saying that it couldn't be a software issue. Anyhow the problem I am having is at partial throttle my car kind of hesitates a little at 5psi and when i let of the gas the car kind of hiccups a little.. but if i really punch it in every gear i hit 21-22psi no problem, the problem happens when I am driving normal and its really annoying.

I have switched several different N75 valves, I am running the stock one now, I've switched different DV's, i have switched my spark plugs and even put at APR turbo inlet pipe and i have checked for boost/vacuum leaks, I have no CEL...all this hasn't resolved my problem.. I don't know what else to do..

I was thinking about switching my MAF to see if it works, but then again if it was my MAF im sure I would have a CEL. I also was thinking about putting my N75 valve backwards even the DV backwards to see if it works?

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GTI 337/20th Anniversary :: Any Way To Tighten Lower Half Of Seat So It Does Not Move?

Whenever I take a turn my seat slides side to side, both bolts are tight in the front. Is there a way to tighten the lower half of the seat so it doesn't move?

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GTI 337/20th Anniversary :: 2.0 Low Oil Light Comes On - Sensor Malfunction

So the motor has a new oil pump and pickup and was all cleaned out. Sludge is not the issue here. I'm running the royal purple filter ( the equivalent of mann 950/4) and royal purple 5w30. My heart dropped after the light came on on the first drive. I pulled out over and checked the oil and for leaks and... full with no leak. So I checked the temp and proceeded to drive home. I don't have an oil pressure gauge but I'm getting the bottom of the fill cap with oil so I know it's making it all the way to the top of the motor, and the motor is not loud or sounding starved.

Basically, I wanted a second opinion that it is most likely oil pressure sensor malfunction. Garrett 60 trim, feed and return lines are brand new and sufficient diameter.

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GTI 337/20th Anniversary :: Transmission Malfunction - 1st And 2nd Gear Are Gone

Well, driving down the road just like any other day. I go from 1st to 2nd gear. It feels like I missed a shift, no big deal decide to put it in 3rd. Missed 3rd gear...... weird, no big deal through it in 4th and was on my way. Got to a red light, no 1st or 2nd gear. Where 1st and 2nd gear are, it feels like there is nothing there when i tried to shift into gear. If I go into 3rd gear its now 1st gear, 4th gear is 2nd gear.Had a mechanic look at my car, and the linkage and clutch are fine. He feels that something minor broke inside the transmission.

A) What do you think might be broken?

B) How could this happen?

Driving my car like a baby, I am never hard on my clutch. No pre-warning, no bad sounds, and I have never had an issue with my transmission before. I am hoping I do not have to pull my transmission out but it looks like I may not have a choice...

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GTI 337/20th Anniversary :: Hesitation On Takeoff - PCV System Malfunction?

I have a 377 gti 2002 and just the other day i had some hesitation on take off. it sounded like the engine was cutting the fuel, at the time i had an o2 sensor code so i replaced the o2 and got new spark plugs while i was at it. it was still hesitating and cutting out so i figured it might be the maf because ive already replaced it once, i cleaned it and still doing the same things. i called my local vw/audi shop (audub) and he said it might be the pcv valve. i checked to see if there was air sucking in through the oil dip stick and the oil cap. its running just fine at idle and it seems that in first and second gear that its hesitating at 1000-2000 rpm and the higher gears are fine. could a leak cause this or is the pcv system bad?

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GTI 337/20th Anniversary :: Rear Wiper Malfunction - Does Not Squirt Right?

I've been having trouble with my rear wiper since forever. Every time i try to use the washer fluid for the rear, it doesn't squirt right and fills up the motorized lock for the trunk and malfunctions the lock for a day or 2 until it drys. I had this same problem with my old 1.8t gti, just in that case i had to have the whole lock replaced due to the damage from the washer fluid (luckily the dealer payed for it).

I was thinking maybe swapping it out for the polo rear wiper on ecs tuning.

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GTI 337/20th Anniversary :: Code P0501 / Compressor And Large Radiator Fan Quit Working

I have an issue with my speedo. I keep getting the p0501(which comes and goes). I have replaced the VSS, CKP sensor, and I even have had my ECU replaced. Problem is the speedo works sporadically. It will work then it will stop. It will bounce around while driving then stop. Is this a cluster or issue?

I also noticed today that my fuel gauge was not being accurate it as well. It would drop then rise. My tach and temp gauge work fine as I used the tach to gauge my speed. I really would like to know what is going on.

Also, my compressor quit working and my large radiator fan quit working. I replace the FCM, but that didn't change anything. Driving with out air in the south is not fun.

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GTI 337/20th Anniversary :: Electrical Malfunction - All The Overhead Lights Aren't Working

I am currently putting the interior of my car back together after a water issue force me to remove everything and have just put the carpet in. While stopping for the night, I noticed that all the overhead lighting doesn't work, the key fob can't lock the car, I can't open the trunk via the button on the door and even if I close all my doors, the car door open light stays on. However, the dash, vents, radio, gauges and headlights work, the car starts, the headlights and tail lights work, and the gas door button works. The ONLY thing I did was remove a #53 block relay that was wired into the rear fogs, since the way the fogs were wired up, they weren't working.

So I removed the relay and wired the fogs directly to the headlight switch. The wiring of the relay was, one wire going to the #9 pin on the headlight switch, one wire going to the 12V source and the last one going to a ground, nothing else. I didn't touch any other wiring or pull any wiring out. What my car is doing now? I was hoping to have it together to go to MIVE's chilifest tomorrow, but this electrical issue makes me uneasy about driving my car over an hour from home without a trusty tow vehicle to rescue me if it goes south.

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GTI 337/20th Anniversary :: Malfunction Indicator Light On Dash Came On And Started Blinking

The car is a 2005.5 GLI (75k mi) w/ EvoTech Stg1 software, GHL stack intake, and an Iridium billet diverter valve.

Well today I was driving and the Malfunction Indicator Light on the dash came on and started blinking. When I stepped on the accelerator, the car felt like it had 1/4 the power and began shaking. The car idles kind of weakly, and feels like it has no power when you step on the gas. Also, when you step on the gas the car will shake. The strength of the shaking depends on how hard I press on the throttle, more throttle = more shaking. There is no shaking when it idles or when I have it cruising, only when accelerating.

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GTI 337/20th Anniversary :: 2004 - Thermostat Housing Malfunction - Coolant Leaking

Bought a 04 GLI had the bad engine, had the engine installed sat at the shop for nearly a year. Towed car to my house to finish it and now I am running into their lack of knowledge and fixing their crap. Now the current issue...On the thermostat housing, a nipple that comes off the side has nothing connected and leaking coolant.

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Passat (B6) :: Bottom Half Of The Rear Defrost Doesn't Work

I picked up a '08 TSI wagon recently and noticed the bottom half of the rear defrost doesn't work & the lines are broke all on one side.

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Hyundai - Elantra :: Headlights Only Illuminating The Bottom Half Of Field Of Vision

I just bought a 2013 Hyundai Elantra GT and it is my first new car. I drived it at night for the first time and noticed that the headlights were only illuminating the bottom half of my field of vision. In fact, as I drove up to the garage, there was a distinct line of top half dark, bottom half(or maybe a third) light.Is this part of a newer design of a car? A flaw? Just new car jitters and is something to get used to? It made me very uncomfortable because I wasn't able to see as much as I am used to.

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Golf V R32 :: AC Malfunction - Don't Blows Cool Air

1) no cool air at all from AC

2) low pressure side shows 0 even after adding some refrigerant

3) ac compressor engages. I can hear a slight load on the motor when I push the ac button

4) when pressing the ac button the fans don't automatically come on. They should come on right

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Passat (B5) :: 1999 - Lower Radiator Hose Stays Cool But Top Is Hot

I picked up a used 99 Passat with 79000 miles. I just changed the oil and found the pan pretty well sludged up - typical from what I read on the forum. I noticed the coolant looked pretty diluted - so I drained and filled with 50/50 mix. After starting I felt for the upper and lower hoses heating up and the lower one never did. I guess I should have tested this out before draining and refilling - also typical. Question is - is this a thermostat issue? My Haynes manual says if the top hose becomes hot the thermostat is operational. Heater has plenty of heat, temp gauge stays pegged at 190 degrees top dead center of the gauge.

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Ford Excursion :: Radiator Work To Cool The Transmission Fluid?

If my coolant temp runs around 185, how does the the radiator to cool the transmission fluid if it goes to the radiator after the tranny cooler?

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Lexus RX 2004-09 :: 2008 RX400H Radiator Bottom Mounting?

how the bottom of the radiator of a 2008 Rx400h is attached? I have the radiator all disassembled except for whatever is holding its bottom to the car. I have a detailed pdf of how to remove a 2006's radiator, but the method of mounting shown for that year doesn't match my 2008.

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