SnowX51

First time posting a tech. question so bare with me! my car is a 1992 Type R FD, and seeing as its winter over here in manitoba (canada), i had a lot of time going over my car! Anyways as i pulled off my turbo's i noticed a fair amount of a brownish looking powder pasted all over the inside of my exhaust manifold and turbine. Could this be a sign of a blown coolant seal in the motor? The car was running fine except the Overflow bottle would "gulp" and overflow when the temps reached just over 100C. Any help appreciated!

Btw the picture makes it look white but its brown!

Radial GT

iTrader: (16)

The brownish color is a normal sign, and tough to ID to coolant leakage.

Please explain more about the coolant system. Was the "gulp" happening often? Overheating, boiling over, or the need to add coolant often?

SnowX51

absolutely! everytime id cruise around in the city (around 20C outside) and shut off the car, you can hear the overflow making the gulping sound and overflowing out of the bottle. My defi gauge was reading around 104C when the overflowing was happeneing. The low light buzzer kicks on but at the safe time as i start driving around or when the fans kick on the coolant temps hover around 85-95C. Highway driving on the other hand doesnt cause the overflow problem when i stop

CryptoPatriot

Check the coolant level sensor, not the temperature gauge to the dash. The level sensor is in the front of the fill housing. And the wire can become disconnected or broken when changing the alternator. Or just wiggle loose or brittle with age and fail. Follow the wire back and make sure its connected. Or try disconnecting it and see if you still get the alarm. It grounds through the coolant IIRC so simply disconnecting it should clear the alarm after about 10-15 seconds.

As for the oil bouncing it is probably the sender like other have mentioned. Some people dont even bother fixing it if you check your oil often.