BHG symptoms

Bill UK · 02-20-2011, 01:25 PM

Check the inside of the oil filler cap, if it has a white residue deposit, then you have moisture in the oil. Very unusual for BHG on a Supra, they normally go between the combustion chambers and coolant.
White residue in the filler cap sometimes accrues if the engine hasn’t been run for a long time. (Like stored over the winter period) or had a recent engine overhaul. Not normally an issue, but it could be in your case.

cre · 02-20-2011, 07:55 PM

You can blow an HG without the coolant contaminating the oil... Or it can leak just enough into the oil passages when it just starts going that it's not visually apparent except under certain circumstances. Check the drained oil for separated coolant floating on top. Also check the rad cap both when the car is completely cold and when completely warm.

I would be equally concerned about the oil leak.

02-20-2011, 07:55 PM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	You can blow an HG without the coolant contaminating the oil... Or it can leak just enough into the oil passages when it just starts going that it's not visually apparent except under certain circumstances. Check the drained oil for separated coolant floating on top. Also check the rad cap both when the car is completely cold and when completely warm. I would be equally concerned about the oil leak. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

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02-20-2011, 01:25 PM	#1
Bill UK AEM EMS Join Date: Jul 2006 Location: UK Posts: 891	Check the inside of the oil filler cap, if it has a white residue deposit, then you have moisture in the oil. Very unusual for BHG on a Supra, they normally go between the combustion chambers and coolant. White residue in the filler cap sometimes accrues if the engine hasn’t been run for a long time. (Like stored over the winter period) or had a recent engine overhaul. Not normally an issue, but it could be in your case.