do I HAVE A BHG?
- Thread starter mista_sup
- Start date
do a block test. rent the kit from autozone. i also hear a waterfall but i dont think i have a bhg, normally there is a performance loss and a loss of coolant. you said its in the intercooler?
mista_sup;1472202 said:
Boosted516;1472220 said:
First thing to do would be to properly purge the air from your cooling system, as that's what causes that waterfall sound. Jack the front up as high as you can (or park on a steep hill and block the tires!), pull the cap off the radiator (don't burn yourself), and rev the motor to about 2k rpm with the heat of full blast (hot and fan). It will also help if you massage the coolant pipes to coerce the air to the front of the system, and essentially, out.
Do that, top off your coolant, and get back to us. Shouldn't take longer than 15 minutes total. Also, make sure your heater valve is opening properly, and fully.
My car had a mild BHG and would make waterfall noises and the overflow would get full/spit coolant after a drive, but never showed a problem on the block tester. Did a leakdown and watched the radiator level rise as i pumped air into 5 and 6... You probably have a BHG, but a leakdown tester will prove if thats right or not
when i say on the intercooler i mean it looks like it overflows from the overflow bottle and spits down onto the intercooler, but it does not bobble or anything like that. cool i will do it tomorrow and get back to you guys. thanks
shaeff;1472229 said:
shaeff;1472229 said:
i tried that once it didnt seemt to work. i also was going to buy a new rad cap from autozone and didnt because it said 13psi....i was unsure if our systems were 15 or 13?
I know my rad cap says Toyota on it and 13psi.
As for the waterfalls, as said before it's caused by air being in the system. Burp the system properly and check for leaks. Even if you have a tiny leak it will still let air in the system while heating up/cooling. Go over all your hoses while your do the burp, see if you can see any coolant anywhere and find where it's coming from.
As for the waterfalls, as said before it's caused by air being in the system. Burp the system properly and check for leaks. Even if you have a tiny leak it will still let air in the system while heating up/cooling. Go over all your hoses while your do the burp, see if you can see any coolant anywhere and find where it's coming from.
you have 7m its manditory for it to blow 
... that aside maybe rent/buy a BHG test they are cheap enough and very handy to let you know for sure.
i wouldnt really drive it much if you suspect it. believe me it can cost you.
hope this helps
shima
... that aside maybe rent/buy a BHG test they are cheap enough and very handy to let you know for sure. i wouldnt really drive it much if you suspect it. believe me it can cost you.
hope this helps
shima
-Make sure you have no external leaks
-Make sure the rad cap is holding within the pressure range listed in the TSRM
-Is the radiator 100% full/fluid touching the bottom of the cap when the car has completely cooled overnight?
-Block checker will be a waste of time/money unless it's a catastrophic BHG, a leak down tester will probably be more definitive.
-I of course respect shaeff's opinion, but you should never have to burp a cooling system like the one we have, when sealed properly it will evacuate all the air on its own just fine after 1-2 heat cycles. If you have to burp it there is another issue, if after burping you notice EVEN MORE coolant being purged from the surge tank than pre-burp then a BHG is fairly definite if the cap is working properly.
You need to look for mechanical details, in all likelihood the stock instrumentation will not show a damn thing is out of line until its WAY too late.
-Make sure the rad cap is holding within the pressure range listed in the TSRM
-Is the radiator 100% full/fluid touching the bottom of the cap when the car has completely cooled overnight?
-Block checker will be a waste of time/money unless it's a catastrophic BHG, a leak down tester will probably be more definitive.
-I of course respect shaeff's opinion, but you should never have to burp a cooling system like the one we have, when sealed properly it will evacuate all the air on its own just fine after 1-2 heat cycles. If you have to burp it there is another issue, if after burping you notice EVEN MORE coolant being purged from the surge tank than pre-burp then a BHG is fairly definite if the cap is working properly.
You need to look for mechanical details, in all likelihood the stock instrumentation will not show a damn thing is out of line until its WAY too late.
89supra7mgte;1472746 said:
You should add what about under the oil cap after a drive where the engine's been at operating temp for a good 10 - 15 minutes. Everyone will get the milky looking junk under their oil caps on short drives from condensation evaporating from the crank case.
Shima;1472548 said:you have 7m its manditory for it to blow
Too true...
BHG's suck. It's not too hard to handle though, just make sure you fix it right the first time.