Question about 1990 BMW 7 Series

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Coolant leaking from the bottom of the engine, the front rectangle bit just near the left wheel. It drains all the coolant put in over a few hours. Just wondering if there is any risk if I just seal that hole with duct tape? Is there a path for the coolant there or is the coolant leaking from somewhere else and down to that part?

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Posted on Jan 02, 2017

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SOURCE: 2000 BWM 528i coolant leak

The 2000 BMW uses a non silica based coolant. OK to use a silica free coolant. Dex-cool is the same. Just make sure it is SILICA free.
Silica based freon supposedly decreases the life span of the coolant system.

Posted on Aug 06, 2008

michigan man
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SOURCE: leaking coolant from behind engine on 96 BMW 318i sedan

have someone check out the intake gaskets also check the heater hoses coming from the heater core

Posted on Jan 20, 2009

  • 104 Answers

SOURCE: overheating problem on a 1998 BMW 318ti

Perform a liquid block test (with the bottle of fluid over the radiator mouth.) If the blue liquid turns yellow or clear, you have hydrocarbons entering the cooling system (usually via head gskt.) If not, you have ruled out a costly repair.

Sounds like it overheats pretty easily, without t-stat! This block testing liquid is cheap, and will verify a suspected leaking head gasket without lengthy diagnosis. Hope it's better news, but good luck!

Tater Todd

Posted on Jan 28, 2009

  • 147 Answers

SOURCE: I have a coolant leak on my 2000 BMW 528i and now it overheating.

Pressure test cooling system to determine origin of leak. Radiator and coolant reservoirs are common problems. Vehicle is very difficult to purge air from cooling system and may take multiple times of idling until thermostat opens. Sometimes help to rev engine to about 2500 rpm 5-8 times to help build heat and move coolant through system. Must have heater on while performing this task.

Posted on Mar 29, 2009

  • 39 Answers

SOURCE: Water leaking from top of expansion tank.

have you replaced the bleeder screws? and the expansion tank cap they both have O-rings that compress and will fail over time also check the hose at the top of the exp tank it also has o-rings inside it

Posted on Apr 03, 2009

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1 Answer

My air conditioner quit blowing cool air. My 2006 Nissan Sentra is leaking coolant out of a skinny black hose near the front left of the engine by the air conditioner line. how can I stop up the hole?

Good idea is to drain the coolant from your radiator, then replace the hose that is leaking and then fill with coolant to the proper level. Drive your car and have heater running to remove any air in the system.

Nov 04, 2016 | Nissan Cars & Trucks

1 Answer

Jeep coolant leak

Have a coolant pressure test done on the system. It can be pressurised beyond cap operating pressure with out getting hot. I feel that the water you see is condensate from the a/c system as that is the location of the drain hose . I am thinking that the radiator is cracked in a core or a tank is split or a welsh plug is rusted most of which will only appear when the coolant system is under pressure form the hot operating temperature.

Aug 03, 2013 | Cars & Trucks

1 Answer

Audi a6 quattro 2001 coolant disappears, engine overheats and white smoke comes out

Unfortunate you're losing coolant into the cylinders, where it's being burned off and exiting out the exhaust. When you initially added that cold coolant into the hot radiator, and hot engine (sit down) you likely cracked the engine block. Best case you just need to replace the head gasket.

Jan 07, 2013 | 2001 Audi A6

1 Answer

Looks like a leak at the bottom of engine

It is likely the water pump is leaking and the coolant is running back under the engine. Put you finger under the bottom of the water pump near the front where the shaft comes out, if it comes back wet with coolant the pump is leaking.

Oct 10, 2012 | 1998 GMC Sierra

1 Answer

Possibility of a cracked block. how can i be sure/

Vehicles: Any with the above symptoms

A cracked cylinder block will cause either:
(a) motor oil contamination of engine coolant
(b) coolant contamination of motor oil
(c) white exhaust smoke, due to coolant seeping into one or more cylinders.
(d) more than one of the above
(e) all of the above

Oil infiltrating into coolant is easy to see - drain some coolant out through the pepcock at the bottom of the radiator, and place it into a styrofoam coffee cup. Oil droplets floating on top of the green (or orange) coolant are easily seen. Or visualize oil by looking into the top of the radiator through the radiator cap.
Coolant infiltrating into and mixing with motor oil will permanently damage the engine (seizing it up through loss of lubrication), and must be prevented.
A leak from above the front suspension is, as physicians like to put it, "nonspecific", with the most likely cause a water pump seal or hose/hose connection.
A leak from near the fire wall will usually be a heater core hose, or hose connection.
A coolant leak on the same side of the engine as the water pump is a leaking water pump or water pump seal until proven otherwise.

To rule out everythng else, here's the 1999 Honda CR-V Troubleshooting Guide for Coolant Loss/Coolant Leaking:

Priority Action Part Type Cause
1 Inspect Water Pump - Worn, Cracked or Leaking Water Pump, or Water Pump gasket.
2 Inspect Head Gasket - Leaking Head Gasket.
3 Inspect Radiator - Leaking Radiator Hose(s).
4 Inspect Radiator Cap - Worn or Damaged Radiator Cap.
5 Inspect Radiator Hose - Ruptured, Cracked or Leaking Radiator Hose.
6 Inspect Freeze Plug - Leaking Freeze Plug(s).
7 Inspect Intake Manifold Gasket - Leaking, Worn, or Damaged Intake Manifold Gasket.
8 Inspect Water Outlet - Cracked, Leaking or Damaged Water Outlet.
9 Inspect Heater Control Valve - Leaking or Faulty Heater Control Valve.
10 Inspect Radiator Drain Pepcock - Loose, Damaged, or Faulty Radiator Drain Pepcock, or Pepcock O-ring.
11 Inspect Engine (DOMESTIC ONLY) - Cracked Cylinder Block Leaking Coolant into at least one Cylinder, causing white exhaust smoke.

Dec 03, 2011 | 1999 Honda CR-V

1 Answer

2004 bmw 325i how to remove a radiator

I have done my other 3-series cars but not yet my '04 325iT, and the procedure is a bit different depending on whether you have an automatic or manual, and depending on whether you have HID headlights, but this should get you headed in the right direction.
It will be really helpful if you have ramps and can run the front end of the car up on the ramps.
First remove the plastic cowling on top that feeds in the air from the grill to the air box. It is held on by four plastic expansion rivets. Then remove the splash guard from beneath the engine.
Hardest part is draining the water without getting it all over the garage floor. You need only drain the radiator, but you will most likely want to drain the engine as well since you will want to replace the coolant. The engine drain plug is on the exhaust manifold side of the block, inconveniently near near one of the oxygen sensors.
Remove the air filter box and the HID igniter (if you have HIDs).
Now start disconnecting water hoses and electrical connectors and the rest should be apparent. Be glad you have a 325 and not a 330 automatic.
Six years is a little young to need to pull the radiator on a 3-series. I'm guessing that either you bumped the front end, or someone put long-life organic acid coolant in your radiator (that stuff destroys BMW cooling systems). BMW branded coolant is very expensive at the dealer but can be purchased on-line for a bit less.
If your coolant temperature sensor is original, try putting a bit of teflon tape around it because the O ring that seals it has shrunk and hardened. It WILL leak after you disturb it. The O-ring is a metric size that is not available in the US unless you are willing to buy 144 O-rings for $80, so you end up buying a new sensor to get the new O-ring, unless you find another way to seal it.

Jan 22, 2011 | BMW 325 Cars & Trucks

4 Answers

I need to drain the antifreeze where is the plug from the engine block

The textbook method is to remove the drain plug. Most drain plug is make of nylon/plastic and it may fall apart while you turn it.

The professional method is to loosen the lower radiator clamp and drop to lower radiator hose.

Drain the coolant onto a large drain pan and recycle the coolant


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Nov 27, 2009 | 1998 Ford Windstar

1 Answer

I have a 2001 Sebring Lxi and it seems to be leaking antifreeze from a random part near the engine. Its overheating any suggestions as of the name of the part?

if it is a 2.7 check the oil dipstick for sign of coolant in oil will looks like chocolate milk, also inspect wip hole on left bottom front side of engine there is a hole if wet or sign of red fluid possible water pump's leaking do not delay in replacing pump, it can damage engine, tell me where or what area of engine do you see coolant, this vehicle used orange 5 years protection coolant. let me know

Oct 20, 2009 | 2001 Chrysler Sebring

1 Answer

2002 yukon

Your description may actually be your answer, so to speak. You mention 'generally as engine is cooling or if coolant is added too quickly'. It sounds to me like the reservoir is over-filled.
When the engine is cooling, coolant tends to flow back to the reservoir (plastic 'jug' where you add coolant). A bad radiator cap or one that was replaced with too low a PSI rating can easily allow too much to fill the reservoir and and occasionally overflow it. Most reservoirs use a rubber tube to drain excess coolant so it may appear to 'leak' near the front left wheel or left side of engine.
Replace your radiator cap. (did they pressure test the cap too?)
Make sure you check your owner's manual for the proper PSI. My sources show 15-16psi, but that sounds a little high to me. Also, make sure you have the correct (50/50) anti-freeze/water mixture.
After you replace the cap, make sure the reservoir has the right amount of coolant and isn't over-filled. (To 'fill cold' line) Drive the engine until hot, then park the truck and see if the problem is fixed. Good Luck!

Oct 31, 2008 | 2002 GMC Yukon XL

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