Sonata NF (2006-10) :: 2007 - Slow Coolant Leak
Nov 24, 2015
My son has a 2007 sonata v6, daughter has one too. Both have about 130K miles, and both developed slow coolant drip leaks. I took off both hoses on both cars, cleaned the crud from the housings and replaced with new hoses and clamps. Problems solved in daughter's car, not so in sons car. I note that it looks like the area below the thermostat housing is wet - and thought that was from the crud/hose situation. But he is still losing coolant, even more now that its getting colder at night, and I's sure its not the hose connection anymore.
The car will generally NOT leak when hot, only as/when it cools off. I.e. puddle in the morning situation.
Looking at the diagrams, it looks like that "housing" is really a connection to the crossover pipe, heater hoses, other stuff (throttle body heat) and also contains what looks like a temp sensor.
I suppose any of these are possible, but my first thought was either a leaky temp sensor (or possibly loose) or something more serious like a cracked housing, leaking o-ring, gasket etc.
View 4 Replies
Advertisement
2007 Sonata GLS - I4; 55kmiles ... I plan to sea foam on my Sonata as it continues to have slow acceleration and poor mileage. Looking for a picture of the Brake Booster or Vacuum line? I want to make sure I am pouring it in the right place.
View 3 Replies
I have a 07 Sonata and having recurring valve cover leak. First time it happened it leaked onto my alternator and had to get car towed and whole bit. About a year later they discovered it again during routine oil change and had it fixed again. Yesterday during a routine oil change, they discovered a leak again!! I know this is an established problem but how many times can the same problem occur?? I'm passed the warranty (103K).
View 3 Replies
Van has 144k miles on it. It's been well maintained (see my other posts). I have had it since new (7 miles). The LIM was done preventively at about 75k miles (5 years ago).
Two to three years ago it started using/leaking etc coolant at a very slow rate. I would estimate somewhere in the 8-10 fl oz per 3-4 month range. As time has gone on it has been progressively using more. Now it is about 12-14 fl oz in about a month or 6 weeks. My "low coolant" indicator came on the other night. It had been a while since I added any coolant mix. 3-4 months anyway. It took about 1/2 gallon (US). There has been no "real" visible leak,up to now. I noticed yesterday when I was under it doing an oil change, that there was a "film" on the bottom of the trans pan. I followed the trail as best I could and it led me to the rear of the engine near the drivers front wheel. It was a small drop of coolant. (I tasted it). Don't try this at home... From the top of the engine looking in, I followed the upper radiator hose to the thermostat housing "pipe". It is very difficult to see in there. I took a few pix. [URL] ....
It looks like there is a little pool of coolant sitting near or under the thermostat housing that pools on top of where the transaxle bell housing meets the engine block. It's very hard to to see in the pix. Some of what looks to be damp, is actually shadow. This pool I believe runs down the back of the engine/trans, and then is blown on top the trans pan and undercarriage.
The van runs great, I want to keep it for the next 9 years. There is no coolant in the oil, or oil in the coolant. Unless the fix is fairly easy, the leak is still small enough that I am not going to bother with it until it becomes a large leak. The car runs cool even in the hot summer pulling a load. The only issue is the leak and that I have to add coolant every once in a while.
View 14 Replies
My wife has a 2006 Touareg V6.
Noticed a coolant leak a week ago, refilled with coolant, and as of today the coolant warning has not come back, so whatever it is must be a very slow leak. Today I took the opportunity with the unseasonable warmth in Chicagoland to investigate.
Got the T-reg up on jacks and belly pan removed, ran the engine while inspecting the bay, didn't see anything.
After I shut the engine off, however, I noticed a small but somewhat steady dripping coming from roughly the middle of the front of the engine block.
Pulled the plastic cover off one of the pulleys, part # reads: 022 121 341. I couldn't find a match anywhere online, but I got tons of results for 022 121 011, which is the water pump.
View 3 Replies
I have a 04" GLI and I was thinking about doing a coolant flush. Looks like I have a slow leak. I was wondering where should I look in order to stop the leak. Put some coolant in about a month ago and now the coolant light is back on. Every morning when I pull out of my driveway there is a small leak under the driver side of my car. Is this an easy fix? If I do decide to do the coolant flush myself what is the recommended coolant replacement?
View 4 Replies
I have a 2006 F-150 XL with the 4.2 V6, auto that has a slow coolant leak that I cannot find.
I bought the truck this spring, 190K, drives good, but it leaks coolant. I have added probably 3 gallons of water this summer, this does not bode well for winter.
I can't see any wet spots or steam, but do smell anti-freeze occasionally from outside the cab.
I don't really want to try easter-egging the repair (replacing things that might fix it).
How to find the leak? Or should I just use some form of stop leak.
View 5 Replies
I have a small leak of greenish fluid (appears to be coolant) coming from a silver/aluminum tube that runs the length of my van, just above the left rear transaxle. The leak seems to be in the tube, near a support that keeps the tubing flush against the undercarriage. It is a slow leak, but it is dripping onto the transaxle/transfer case, and is beginning to leave a small puddle on my driveway -- gets a little worse each time I drive. I haven't noticed much loss of coolant in the reservoir, so not sure what this is and how to fix it. I have a photo. I am thinking the tubing might be part of the heating system.
View 4 Replies
2008 Highlander - super slow coolant leak. Dealer can't find it via pressure test. Never trips sensor, but after 6 months or so, the heater doesn't work well unless turning to the left. Has happened since new, but now Just out of warranty. Dealer has recorded two pressure tests and leak, but I'm wondering what to do.
View 13 Replies
On my 1.8t jetta she is leaking coolant slowly. Just started when it got cold out. It is dripping down the oil pan right down the center. It is falling off the oil drain plug. Was reading that it could be the water pump leaking but then it wouldn't be in the center of the pan. Got it jacked up now so here are some pics.
View 6 Replies
New truck to me. Truck was advertised with a slow coolant leak. Figured I would trace the leak down and get it repaired no issues. Anyway, working on it this evening I take a close look around the oil filler area and notice the dreaded milkshake color.
I drained the oil out of the truck and the oil actually came out nice and black. Is the headgasket the only area that would cause the oil/coolant mixture? Supposedly the truck has never been overheated.
At any rate, on to find articles on how to pull apart a 4.6L Triton head. I'll see if I'm up to this challenge.
View 3 Replies
I have a 2015 sonata SE with the stock 16 inch kumho summer tires. One of the tires just developed a leak, a slow one, after 5 days psi drops from 34 to 28. I am guessing I ran over a nail? or maybe valve leak? I don't recall driving over a pothole or anything that would otherwise damage the tire or rims.
Now suppose it is a nail, is it dangerous to keep it in there? will it deteriorate the rubber even more? Or is it one of those things i can leave in there, and just keep pumping air every few days?
Just wondering is it worth it to bring it to the tire shop and have the check for where the leak is and have them patch it.
I have 3750 miles on my tires, when should i get it rotated and/or replaced? How does one replace tire since there is a TPMS system? is it easy to do without dealership?
View 20 Replies
One last issue with my 2000 B3000 3.0L. The leak seems to be on the left (passenger) side of the water pump very near where the bottom radiator hose connects to it. I can't find any loose bolts. It does not leak while driving the truck or soon after. It has to sit for several hours or overnight before it shows up. There are usually 3 or 4 wet spots where it drips from the water pump to the frame to the driveway. It is small enough that I only have to fill up my coolant tank every 1 or 2 months. Could this just be a small gasket leak? It's been happening for about a year or so I think. I replaced the radiator about 2 years ago. I've been expecting it to get worse or bust loose and have been checking it very often. I've never seen one not leak while running like this-has me puzzled.
View 6 Replies
Will start with the back story, i have a 2007 G6 V6 that had a slow leak in the radiator. I kept it full and it only went higher than normal once but i noticed it right away and didn't let the needle peg at hot so I've kept it full, checking it every time I went somewhere. the other day on my way to work the needle pegged at hot and the temp light came on so i pulled over right away and shut the car off and let it cool for an hour and added some more coolant. started it up again and the temp stayed normal for a minute so i tried to get it back to the house when the needle pegged, i lost power and the check engine light came on. i stopped the car and called a tow and while waiting on the tow truck my battery died and all i had running was the hazards. the only thing I noticed was the leak in the radiator had gotten worse.
After I got it home and let it sit for 5-6 hours i got a jump from my neighbor and I noticed I wasn't getting any circulation, the reservoir was still full, the check engine light came on and stayed on, and within a minute or two the temp was rising fast so i shut it off and haven't touched it since except to check the oil which looks, smells, and feels fine and is at the proper level and didn't see any oil floating around the overflow tank. and while the car was hot I didn't see any smoke or steam coming from anywhere aside from the leak in the radiator, the water pump pulley was spinning fine, no whining or whirring sounds. i did notice that the plastic piece where the metal overflow line attaches to the engine was badly cracked but wasn't leaking.
I'm thinking maybe the water pump went out and/or the thermostat is stuck closed and caused the overheating issue. as far as the check engine light goes, could that cracked plastic piece cause the check engine light to stay on?not sure if there's a sensor involved in that or not. or could it be the low coolant sensor causing it as the block has no coolant in it?
View 8 Replies
1) It's a very slow leak.
2) I am under Power Train Warranty for another year (Certified Pre-Owned).
3) My friend is a mechanic who will fix it for free as long as I buy the Water Pump.
But I worry Toyota is going to give me a hard time and say it's something else not covered by warranty or say it's not you water pump but the radiator, which shows no sign of leakage and is not covered by warranty.
My friend showed me the bolts that were corroded white on the pump with a mirror and flash light. I buy the water pump and he installs it for free or go to a Toyo dealer where you don't know what to expect?
2006 Camry LE 4 Cylinder, 48,000 miles---I know Toyota makes junk Water Pumps.
View 1 Replies
We have a 2006 Pacifica which as of recent has been slow to warm in the cabin, especially after a couple hour rest (oddly enough, it warms faster after sitting overnight). Also, when checking the fluids, we noticed that the coolant reservoir was just about empty. We added more 50/50 HOAT coolant, maybe 40-50 oz to get it normal cool engine level. This was done when the engine was cold. My wife noticed that the engine has been running warmer than normal. Normal is maybe a quarter the way up on the temp gauge, where it was around the halfway point, still far from the red zone but not its normal level.
This symptom has been going on for maybe a week. After adding additional coolant, the level stayed where we filled it as the engine warmed up. The heater warmed up to a normal level from what I can tell (it is 30 degrees warmer than last week) so it didn't start with a freezing cabin. I haven't seen any leaking of coolant, since I'm sure I would notice a hot pink puddle under the car. This is pretty typical or the sign of something major. It has around 80k miles on it.
View 2 Replies
We had our Timing belt& water pump replaced 5 months ago, due to maintenance book suggestion for our 2006 Toyota Sienna LE, 119,000 miles on her. Now there is a leak in the R & P.
View 2 Replies
Don't recall exactly how long this has been going on, maybe a month. Between 20-45 mph, car sounds like it should shift. It finally does at 45 and all is well. But when I am in a 35 mph zone, the whining noise is scary. Is this serious?
View 44 Replies
We began to have an issue today with our 2010 Elantra. While driving, the Check Engine, Check Coolant and EPS lights all came on. The engine then would not speed up but run slow. The tachometer stopped working.
It was coming into our neighborhood, so we got it to our house. After checking around under the hood (fluid levels, etc.), all looked good. Then we noticed that the mats and carpet are wet up under the dashboard on both the driver and passenger sides. When I reached up into the dashboard over the wet areas, I feel water all along the wiring, etc.
I am guessing that water has leaked in somewhere, maybe after the rain storm last night. We have had the car two years and less than 15K miles. Why and where water would be coming in?
View 1 Replies
I have noticed my 2007 SF V6's coolant is reducing at reservoir. I added premix coolant about 1 liter a month ago. Today I saw my driveway was wet, and this hose end was leaking.
I turned the spring clamp about 90 degree. but it's still dropping like 1 drop per 1 minute or so. Is this common issue? and how can I fix this?
Should I change the black hose? or change the same new spring clamp or change the spring clamp to a wider screw clamp?
Also, when detach the hose end, some amount of coolant will come out then, just adding premix coolant into reservoir for the max level is good enough? or do I have to bleed radiator airs?
View 19 Replies
My 2009 Sonata 2.4L GLS is jerking at around 20mph when I slow down for the first 10 minutes that I start driving. I have taken it to the dealership 2 times. The first time, they updated the computer module for the transmission, however the problem was still there afterwards. The next time, I did a transmission fluid flush and fill, but yet I still have the same jerking problem.
View 12 Replies
