Question about 1989 Suzuki GSX-R 750 RK

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Oil cooler leaks..

Can they be repaired or are the tubes all alluminum?

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  • nunnzer Dec 17, 2008

    yes it is the oil cooler itsellf,,it weeps thru the fins on both sides..one more than the other

  • miccamicca May 11, 2010

    Is it the cooler core itself thats leaking or the fittings and connections ?

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The tubes, or core of the cooler cannot be repaired. They are very thin walled. Another point to consider is that your bike is oil cooled (Suzuki Advanced Cooling System) its very important that all this works properly because a catastrophic failure of the cooler will destroy your engine and possibly kill you when the oil reaches the back wheel. You will need to replace it with an identical unit. Should not be hard to find one at a breakers or ebay.
Regards, Mike.

Posted on Dec 17, 2008

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97 vw golf 1.8 there is a squar box where oil filter fastens to. oil is leaking from top of this box. what is this box and how i fix the leak?


The box is the oil cooler. The oil is most likely leaking from the oil cooler seal. The oil cooler is the square aluminum piece that the oil filter screws onto. To replace the seal, remove the filter, remove both coolant hoses that attach to the cooler, remove the nut that secures the cooler to the block and slide the cooler off the tube. Replace the rubber o-ring seal which is available at the VW dealer. It's inexpensive. Replace everything in reverse order. Good luck

Jan 05, 2011 | Volkswagen Golf Cars & Trucks

Tip

How to check you Volkswagen & Audi oil cooler for leaks.


If you own a Volkswagen or Audi and have coolant in your engine oil or oil in your coolant you may have a failing oil cooler. This may have been misdiagnosed as a bad head gasket.

Before spending hundreds or thousands repairing a head gasket that may not be the problem you can perform this relatively easy check of your oil cooler which is a common problem on many Volks/Audi models that use oil filter type of oil cooler. This type of cooler is located between the oil filter and the engine block. The oil filter screws onto the oil cooler. It has two rubber coolant hoses attached to it and is made from aluminum.

The oil cooler works by passing engine oil through the body of the cooler. The engine oil passes over what resembles a radiator inside the cooler. This 'mini radiator' is passing engine coolant in through one of the hoses and out through the other. When working properly the oil and coolant is kept separated. Over time the passages inside the cooler can corrode and the oil and engine coolant inside can mix. This can lead to coolant in your engine oil (which may produce a milky substance on the inside of the oil filler cap) or oil in the coolant (which you may be able to see in the coolant reservoir as a dark ring or oily film).

To test your cooler for leaks you will need a few basic tools and about 3 hour of your time. (To allow for the engine to cool)

-Basic ratchet set and set of screwdrivers.

-One straight 5/8 inch plastic heater hose connector. You can find thisat most auto parts or plumbing supply stores. Cost about $1.

-A pan to catch some coolant that will spill.

This procedure is best done on a lift but can be done using jack stands as well. This MUST be done with a cool engine to avoid burns from coolant.

-Lift or jack the front end of the car. (If you don't know how to safely jack a car onto jack stands, DO NOT proceed any further. Take the car to your repair shop and have them follow these instructions)

-Remove the plastic cover under the front of the car (if your model has this) to expose the oil filter. The oil filter is a cylindrical part that sticks out from the side of the engine.

-The oil filter is screwed into the oil cooler. You will see two rubber hoses connected to the oil cooler.

-Using a flat screwdriver or socket loosen the clamps connecting the hoses to the cooler. Now have the plastic connector handy. Remove the hoses from the cooler, you may need to pry on them with a screw driver.I find that twisting them to break their seal works well. Catch any coolant that spills in the pan.

-Take each rubber hose and push them onto the plastic connector being sure to keep the clamps on the hoses. Tighten the clamps. (Not too tight, just snug) Now you have just eliminated the cooler from the system temporarily.The rubber hoses are now connected to each other.

-Wipe the oil cooler clean with a rag so it is easier to see any leaks that might develop.

-Now start the engine and let it run to normal operating temperature.This means at least 15 minutes but to be sure you find any leaks I suggest half an hour.

-Keep a close eye on the 2 metal tubes on the oil cooler. (The ones you removed the rubber hoses from) You are looking for engine oil to begin seeping out. It will appear golden brown to black in color.

If you see oil coming from those tubes you have found your problem. You will need to buy and install a new oil cooler.

If you don't see any oil leaking you will need to look elsewhere for the trouble. Possibly a head gasket, unfortunately.

-Let the engine cool for a few hours before reattaching the oil cooler. It is the reverse of removal.

-Replace any lost coolant with the same amount you caught in the pan.

And there you have it. A pretty simple procedure that may save you a bunch of cash in repairs.



on Jan 31, 2010 | Volkswagen Golf Cars & Trucks

Tip

How to check your Volkswagen & Audi oil cooler for leaks.


If you own a Volkswagen or Audi and have coolant in your engine oil or oil in your coolant you may have a failing oil cooler. This may have been misdiagnosed as a bad head gasket.

Before spending hundreds or thousands repairing a head gasket that may not be the problem you can perform this relatively easy check of your oil cooler which is a common problem on many Volks/Audi models that use oil filter type of oil cooler. This type of cooler is located between the oil filter and the engine block. The oil filter screws onto the oil cooler. It has two rubber coolant hoses attached to it and is made from aluminum.

The oil cooler works by passing engine oil through the body of the cooler. The engine oil passes over what resembles a radiator inside the cooler. This 'mini radiator' is passing engine coolant in through one of the hoses and out through the other. When working properly the oil and coolant is kept separated. Over time the passages inside the cooler can corrode and the oil and engine coolant inside can mix. This can lead to coolant in your engine oil (which may produce a milky substance on the inside of the oil filler cap) or oil in the coolant (which you may be able to see in the coolant reservoir as a dark ring or oily film).

To test your cooler for leaks you will need a few basic tools and about 3 hour of your time. (To allow for the engine to cool)

-Basic ratchet set and set of screwdrivers.

-One straight 5/8 inch plastic heater hose connector. You can find this at most auto parts or plumbing supply stores. Cost about $1.

-A pan to catch some coolant that will spill.

This procedure is best done on a lift but can be done using jack stands as well. This MUST be done with a cool engine to avoid burns from coolant.

-Lift or jack the front end of the car. (If you don't know how to safely jack a car onto jack stands, DO NOT proceed any further. Take the car to your repair shop and have them follow these instructions)

-Remove the plastic cover under the front of the car (if your model has this) to expose the oil filter. The oil filter is a cylindrical part that sticks out from the side of the engine.

-The oil filter is screwed into the oil cooler. You will see two rubber hoses connected to the oil cooler.

-Using a flat screwdriver or socket loosen the clamps connecting the hoses to the cooler. Now have the plastic connector handy. Remove the hoses from the cooler, you may need to pry on them with a screw driver. I find that twisting them to break their seal works well. Catch any coolant that spills in the pan.

-Take each rubber hose and push them onto the plastic connector being sure to keep the clamps on the hoses. Tighten the clamps. (Not too tight, just snug) Now you have just eliminated the cooler from the system temporarily. The rubber hoses are now connected to each other.

-Wipe the oil cooler clean with a rag so it is easier to see any leaks that might develop.

-Now start the engine and let it run to normal operating temperature. This means at least 15 minutes but to be sure you find any leaks I suggest half an hour.

-Keep a close eye on the 2 metal tubes on the oil cooler. (The ones you removed the rubber hoses from) You are looking for engine oil to begin seeping out. It will appear golden brown to black in color.

If you see oil coming from those tubes you have found your problem. You will need to buy and install a new oil cooler.

If you don't see any oil leaking you will need to look elsewhere for the trouble. Possibly a head gasket, unfortunately.

-Let the engine cool for a few hours before reattaching the oil cooler. It is the reverse of removal.

-Replace any lost coolant with the same amount you caught in the pan.

And there you have it. A pretty simple procedure that may save you a bunch of cash in repairs.




on Jan 31, 2010 | Audi A4 Cars & Trucks

1 Answer

Oil leaks pour from my Oil cooler right above oil filter when I start driving


The oil is most likely leaking from the oil cooler seal. The oil cooler is the square aluminum piece that the oil filter screws onto. To replace the seal, remove the filter, remove both coolant hoses that attach to the cooler, remove the nut that secures the cooler to the block and slide the cooler off the tube. Replace the rubber o-ring seal which is available at the VW dealer. It's inexpensive. Replace everything in reverse order. Good luck

Jan 03, 2011 | 1997 Volkswagen Jetta

1 Answer

My 96 jetta 2.0 is leaking oil from the top of the oil filter mounting area where the water hoses connect to it.it looks like it has two or three pieces bolted together might be plastic.can I take apart...


The oil is most likely leaking from the oil cooler seal. The oil cooler is the square aluminum piece that the oil filter screws onto. To replace the seal, remove the filter, remove both coolant hoses that attach to the cooler, remove the nut that secures the cooler to the block and slide the cooler off the tube. Replace the rubber o-ring seal which is available at the VW dealer. It's inexpensive. Replace everything in reverse order. Good luck

Dec 31, 2010 | 1995 Volkswagen Jetta

2 Answers

How do i repair oil filter housing leak?


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Dec 28, 2010 | 1997 Volkswagen Jetta

1 Answer

Need to replace the auxillary transmission cooler


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Jul 23, 2010 | 1996 GMC Jimmy

2 Answers

How to remove a radiator from a ford taurus


Disconnect battery ground cable. Remove battery. Remove battery tray. Remove clip retaining contant control relay module and position module aside. Remove radiator cap. Raise vehicle front end as high as possible. Remove radiator splash shield. Drain radiator. Remove the radiator mounting bracket assembly. Remove lower radiator hose. Partially lower vehicle. Remove upper radiator hose. Remove radiator overflow hose. Remove upper A/C condenser core retaining bolts. Remove upper transmission oil cooler tube clips. Remove lower transmission oil cooler tube. Raise vehicle. Remove lower transmission oil cooler tube clips. Remove lower transmission oil cooler tube. Remove transmission oil cooler bracket and position transmission oil cooler aside. Remove lower A/C condenser core bolts and position A/C condenser core aside(be careful not to loosen the AC condenser lines. Remove radiator support bracket. Remove radiator out through the bottom of the vehicle.
Installation
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2 Answers

I have F-350 disel 7.3 It has a oil leak in the oil cooler! but i dont see a cooler, were should I look!!! thanks mike


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Jun 08, 2009 | 1994 Ford F350 Crew Cab

1 Answer

Oil passing into cooling system


I would assume the truck is an automatic. If the oil is red in color or pink in the radiator then you may hae an oil cooler leak. The auto tranny cools the oil by passing the oil through the radiator in tubes. If these tubes are leaking you would experience the oil leaking in to the radiator. The other worse scenario would be that you have a cracked cylinder wall that is leaking motor oil in to the crankcase. Good luck

Mar 15, 2009 | 1994 Ford F350 Crew Cab

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