23 votes
Accepted

Switching engine coolant with similar properties oil

There's a very straightforward answer to this question: Water has a much, much higher capability to transfer heat than oil. Even if you were able to overcome the safety and design issues brought up ...
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  • 1,124
11 votes
Accepted

Should Multiple Coolant Hose Leaks in a Short Time Worry Me?

Remember that the reliability of any system of components will only be as strong as the weakest link. Coolant lines are pressurized under regular operation and the walls of the hoses will weaken with ...
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  • 39k
11 votes

Should Multiple Coolant Hose Leaks in a Short Time Worry Me?

I believe (and this is a gut check) you can chalk this up to deteriorated hoses which all have gone bad in the same period of time (coincidence). Each has probably served a long fruitful life and now ...
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10 votes

How bad is it to drive very short distances with little to no coolant

It seems that you are only worried if the car will leave you stranded, not if it is bad for the car to drive around with (possibly) a bad head gasket. Driving around with a shot head gasket is not ...
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  • 1,340
7 votes

Coolant Flange - What is it really called?

tl;dr: it's really called a coolant flange. I had also never heard of a coolant flange but it turns out that it's a real part and, based on the video, it's a part that fails around 120K miles (which ...
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  • 24.3k
5 votes
Accepted

2000 Dodge Neon P1390 Cam/Crank Correlation

I checked a known good waveform (cannot copy here, copyrighted). Yours is shifted just a bit to the right. Around your frame 95 that cam sensor vertical line should exactly bisect the horizontal line ...
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  • 11.5k
5 votes

Is it unreasonable to expect nation chain mechanics to recognize a blown head gasket from a radiator problem before installing new radiator?

I would not immediately assume the repair shop was out to get you. Its possible, but not likely. PepBoys is a national chain, and their best most profitable behavior is to quickly and efficiently ...
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  • 6,479
5 votes

Switching engine coolant with similar properties oil

Water has the nice property that it boils at a fairly low temperature, so the vapour pressure rises quickly with temperature and it is easy to design fail-safe over-pressure protection (a simple ...
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  • 2,929
5 votes

What is this connector piece called coming from radiator?

You don't have to replace the metal collet (crimped part) with a new one. Just replace the hose and put a jubilee clamp (worm gear hose clamp) in its place. Easy peasy and a whole lot less money. The ...
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4 votes

How bad is it to drive very short distances with little to no coolant

Provided you regularly check the coolant levels (with the engine cold) and top up then you ought to be fine. Running an engine without coolant is not ideal but I suspect there was some residual left ...
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4 votes
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Diagnosing Head Gasket Leak: Coolant bubbles, but doesn't squirt

Bubbles can usually be an indicator. Coupled with the oily coolant and coolant loss, it seems like a pretty cut and dry case. However the only way to know 100% is to get your exhaust tested or system ...
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4 votes

Can I leave a coolant leak for a month if I won't be driving my car?

What you're describing is usually where the drain is for the A/C core. Humidity collects on the evaporator core, then gets collected, then drains out through this tube. If the radiator is a bit low, ...
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4 votes

Metal L shaped coolant line leaking

Is the leak coming from where a metal (yes, most likely aluminum) and rubber part are joined? If so, you can remove the crimped ring which is there and treat the interface like any other by using a ...
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3 votes
Accepted

Why can't I get my thermostat housing to seal?

The rubber seal around the outer edge of the thermostat should provide the seal without the use of RTV. 3+mm would be enough to cause a leaking issue, no doubt. As for the RTV which you now have on ...
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3 votes
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2004 Tahoe: Oil and Coolant Dissapearing

There could be a number of things going on. Without external evidence, high oil usage can be from worn piston rings allowing oil to be sucked into the cylinders and burned. This is called "blow-by". ...
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  • 9,035
3 votes

I'm leaking antifreeze

Many times in older cars when a leak develops it's because of a pinhole sized rupture in one of the coolant hoses. When the car is cold you won't be able to see the leek because it will only show up ...
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3 votes
Accepted

Indica petrol 2006,coolant leakege

If the leak is only inside the vehicle: There are 2 tubes that allow the coolant to flow in and out through the firewall. These tubes send heated coolant to the heater core inside your dash to ...
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3 votes

1996 Chevy G10 Van - Coolant Leak, No Overheating

Small leaks can be difficult to pinpoint. There are dyes that can be added to the coolant that will glow when seen with a black light. You can try installing a pressure tester. It is a small hand pump ...
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  • 19.7k
3 votes

Coolant leaking from the radiator hose

Cooling systems build pressure as they get hot. You will need to isolate where the leak is coming from. Here are a few scenarios that could be in play. Radiator cap is not holding pressure and ...
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  • 9,035
3 votes
Accepted

How often to put water in coolant

Firstly, if your coolant is draining every week, then you have a major leak somewhere, and I'd recommend you get that fixed first - otherwise you may find that you run out during a journey and ...
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  • 28.6k
3 votes

What is causing Mazda 3 overheating and cold heater?

In addition to what SteveRacer noted about the coolant analysis, you have all the symptoms of interrupted coolant flow. Usually its a broken water pump but in your case it could also be a clogged ...
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  • 1,340
3 votes

Coolant disappearing

There aren't that many choices: Its dripping on the ground from a leak. Its dripping on a hot exhaust manifold and turning to steam before it can drip on the ground (highly unlikely) Its going into ...
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  • 6,479
3 votes

Switching engine coolant with similar properties oil

Oil has been used as a heat transfer fluid in many applications (especially high temperature ones) but in engines the higher viscosity will require more pumping power, which means more driving power ...
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  • 34.4k
3 votes
Accepted

Coolant Leaks while Engine is Running on 2003 Hummer H2

The water pump tends to leak (more in some cases, or only in some cases) when the engine is running due to a few reasons: the pump causes a pressure difference in the system the cooling system ...
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  • 34.4k
3 votes

What is this connector piece called coming from radiator?

I do like Paulster2's answer, but... That hose nearly 30 years old. If the leak is as simple as a weak crimp, you would just cut the aluminum ferrule off, cut and remove the rubber hose, and plan on ...
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  • 6,479
2 votes

Should Multiple Coolant Hose Leaks in a Short Time Worry Me?

It could be a stuck or blocked radiator cap. Did you change the cap at any stage? If the level in the coolant reservoir fails to rise and fall with engine temperature that could be a clue.
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  • 21
2 votes

cooling system vw

As a first step to helping you answer your question it will be helpful to familiarize yourself with the cooling system. I would recommend this video as a short introduction. https://www.youtube.com/...
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  • 1,169
2 votes

2005 Chrysler Sebring coolant bubbling and leaking

I agree with dlu. I would check the radiator cap next if the thermostat is known to be good and the car doesn't show that it's overheating on the gauge. Here's a picture of the functionality ...
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  • 1,948
2 votes

Pink residue and overflow around the coolant reservoir

It is probably "normal spill" while driving because the cap on this model seems rather crappy. Because if it overflowed due to overheating etc. the liquid would have come out from the pressure vent, ...
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2 votes

Pink residue and overflow around the coolant reservoir

What you are seeing is the residue from coolant. If you look inside the overflow reservoir, you can see the standard "red" Toyota coolant, thus the reason for the red-ish looking residue. Why the ...
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