Originally Posted by humyum (Post 255504)

Hey guys have a 1998 800(i guess everyone knows it by now for the amount of problems my car is giving).Run 63800 km carburated.Since around 3000 km i have been noticing that every 700 to 800 km the coolant container which is present in the bonnet becomes empty and i have keep refilling it again and again.There is no coolant in the oil nor any oil in the coolant.There is no visible smoke from behind too.
Opened the bonnet and got it checked with the mechanic.There was no visible leaks anywhere.He was thinking that maybe the tube which carries water from the coolant container to the radiator must be leaking and cut the pipe and fixed it tightly.
But still the coolant consumption continues.I have one more doubt.Whenever i open the bonnet to check the coolant level in the coolant container the coolant container cap is always open and i always close it back and everytime i check again its open.Can all the coolant just evaporate from the container if the cap is open?chances of the coolant spilling out are nill as maybe even if it spills than half of it will be gone and not the entire coolant

Originally Posted by SirAlec (Post 1653449)

just check various rubber hoses. one of them is very small below the carb. and also the elbow and gasket at the same place is very susceptible to leakage. this is a common culprit in old cars.

BTW any chance you also have a heater in in.

Originally Posted by sumeethaldankar (Post 1659908)

Hi,
Happy new year to all of you.I have checked the radiator cap it really seems fine with the spring having enough tension and the coolant reservoir cap has the rubber thing still intact.

I do find the coolant coming out from the reservoir cap and do no think any of the pipes are leaking.So still stuck with the same issue.

Originally Posted by Ashok Naik (Post 3657327)

Hello Mr. Sumeethaldankar,
I am also facing the same problem. My drive is a 2005 model BS3 800 AC. The coolant level seems to be falling after 500 kms. Normally coolant is changed every 2 years. Radiator fan is working fine. No overheating.

Originally Posted by saket77 (Post 3657352)

If the car is not overheating, then first check for leakages, especially in the rubber hoses. If you read the first post on the thread, then the same problem was sorted out by tracing and replacing a leaked hose.

Also check the engine oil. A brown-milky colour of the engine oil tells that coolant is being mixed with engine oil at some stage. In this case, the problem should be attended with urgency. I sincerely hope it is just a leak.

Regards,
Saket

Originally Posted by Ashok Naik (Post 3657368)

Thanks Mr. Saket,
My observations so far-
1. The coolant level is dropping either due to spillage from the top of the plastic bottle or due to some leakage in the rubber hoses. But I never find anything on the floor after parking.
2. There were air bubbles in the radiator for 2-3 seconds after a cold start in the morning. After that there were no air bubbles at all for the next 3 minutes. I turned off the engine after that fearing I might burn myself from hot coolant.
3. A very thin layer of oil can be seen floating on the surface of the coolant in the radiator.
4. The car has run 50k kms.
5. Some days ago engine oil was leaking and the tappet was changed.
6. The car not serviced for 2 years! But no over-heating, ever.
7. Should I go for compression test? Somewhere on this forum I has read that compression tests should not be carried out on old vehicles.
8. No milky brown colour of engine oil or white crystals on top of the dipstick in the morning.

Kindly refer to my post on-http://www.team-bhp.com/forum/technical-stuff/134621-do-i-need-change-head-gasket-2.html
Thanks,
Ashok.

Originally Posted by Ashok Naik (Post 3657327)

Hello Mr. Sumeethaldankar,
I am also facing the same problem. My drive is a 2005 model BS3 800 AC. The coolant level seems to be falling after 500 kms. Normally coolant is changed every 2 years. Radiator fan is working fine. No overheating.

But I noticed a few air bubbles in the radiator for 2-3 seconds after a cold start. Replacing the head gasket is a complex job and I do not understand why a car that has run only 50k needs a head gasket replacement.

There is a thin layer of oil molecules floating on the surface of the coolant, though. Can you tell me what may be wrong?

Thanks

Originally Posted by Captain Slow (Post 3657398)

Are you sure its oil in the coolant reservoir? First thing replace the coolant with fresh coolant/distilled water. Run the car for a while and see if you still see oil.

Your engine oil is 2 years old. Might want to replace this. When replacing the oil check if any coolant/water is mixed with the oil.

Check for any leaks. Most leaks are so small that it leaks only when the engine becomes hot. I have a car leaking few drops when the engine becomes hot.
The leak was isolated to the radiator joint. (where the plastic bottom and metal join)

Ideal way to check for leaks, Raise the car on a lift and keep the car idling for a while. If there are any leaks you should see them soon.

Originally Posted by sumeethaldankar (Post 3657435)

Wow this was 5 years ago and i don't even the car with me any more. Suggest you take it to a good mechanic and let them diagnose the issue. I was told by a mechanic that if the coolant level exceeds between the mid day mark of the reservoir it will spill out . You can also get your radiator caps and coolant caps changed to see if that stops the leakage. Best show it to a trusted garaged.