BHG i think

Lucrosen · 10-13-2008, 04:35 PM

Hi I'm new to the supra world. I bought a supra last month and think I blew the head gasket already. When i bought it the guy i bought it from said it had an air bubble in the cooling system from when he replaced the radiator. Well from time to time i hear a sloshing sound behind the dash. The wierd thing is the car never gets hot, I don't have coolant on the ground (i did at one point but a heater hose blew it had a pinhole in it) the car runs good, but i am losing coolant somewhere. What i'm wondering is if it is the HG since i have a N/A can i use a toyota OEM gasket and and ARP bolts? I don't want to have to do this again. I will be sending the Head out to get machined and will likely lap the block myself. I have no intensions of doing any performance upgrades or anything like that just want to keep it as a daily driver. thanks

Moy · 10-13-2008, 05:12 PM

If you're getting the head machined and the block lapped, I suggest going with an HKS metal HG and ARP studs torqued to ARP specs. I think thats around 80 ft/lbs or so. MHG and ARP studs are the best way to ensure that you won't get BHG

CyFi6 · 10-13-2008, 08:03 PM

dont bother with the MHG. You need to remove the engine and get it done professionally for a good seal. Get the head machined and clean the block surface well, no need to lap it, just get a real strait-edge and make sure its flat. I reccomend you get a full head gasket set, because most of the gaskets you remove are going to be very old and broken, so you need new ones. Try to find a "Stone" gasket set, ask your machine shop if they have that.

First off though, make sure you actually have a BHG before you go doing all this. Is there any smoke? Is there any coolant in the oil/oilin the coolant?

SilverBullet05 · 10-14-2008, 12:17 AM

check the oil first if its milky then its a bhg and if you have to do a coolant pressure check and possibly pull the plugs before doing it to listen for leaks this should tell you if you have a leak my guess is bhg.

Lucrosen · 10-14-2008, 06:34 AM

The oil is clear. I did a tune up 2 weeks ago and the plugs came out ok. With the exception of the number 3 & 4 plugs, they were original and quite ugly. First time i ever saw 20 year old plugs. The car has never smoked, with the exception of when i did the tune-up, there was oil on top of the plugs and i let some of it drain into the cylinders. But never any white smoke. That is why i don't understand where the coolant is going. Then today after school the car was dumping coolant out from behind the block somewhere. i popped the rad cap and it stopped think i have another blown heater hose. It would be that smaller one that just does a 90degree turn from right behind the exhaust manifold. I bought this car last month with no idea what i was getting into. I like the car but are supras always this finicky?

10-13-2008, 04:35 PM	#1
Lucrosen Stock Join Date: Sep 2008 Location: Pittsburgh, PA Posts: 2	BHG i think Hi I'm new to the supra world. I bought a supra last month and think I blew the head gasket already. When i bought it the guy i bought it from said it had an air bubble in the cooling system from when he replaced the radiator. Well from time to time i hear a sloshing sound behind the dash. The wierd thing is the car never gets hot, I don't have coolant on the ground (i did at one point but a heater hose blew it had a pinhole in it) the car runs good, but i am losing coolant somewhere. What i'm wondering is if it is the HG since i have a N/A can i use a toyota OEM gasket and and ARP bolts? I don't want to have to do this again. I will be sending the Head out to get machined and will likely lap the block myself. I have no intensions of doing any performance upgrades or anything like that just want to keep it as a daily driver. thanks __________________ '87 Supra N/A 5sp manual No mods

10-14-2008, 12:17 AM	#4
SilverBullet05 Intake Join Date: Jul 2008 Location: Iowa Posts: 44	check the oil first if its milky then its a bhg and if you have to do a coolant pressure check and possibly pull the plugs before doing it to listen for leaks this should tell you if you have a leak my guess is bhg. __________________ ALL BOOST NO JUICE! In need of some 7mge parts, let me know what you got.

10-14-2008, 06:34 AM	#5
Lucrosen Stock Join Date: Sep 2008 Location: Pittsburgh, PA Posts: 2	The oil is clear. I did a tune up 2 weeks ago and the plugs came out ok. With the exception of the number 3 & 4 plugs, they were original and quite ugly. First time i ever saw 20 year old plugs. The car has never smoked, with the exception of when i did the tune-up, there was oil on top of the plugs and i let some of it drain into the cylinders. But never any white smoke. That is why i don't understand where the coolant is going. Then today after school the car was dumping coolant out from behind the block somewhere. i popped the rad cap and it stopped think i have another blown heater hose. It would be that smaller one that just does a 90degree turn from right behind the exhaust manifold. I bought this car last month with no idea what i was getting into. I like the car but are supras always this finicky? __________________ '87 Supra N/A 5sp manual No mods Last edited by Lucrosen; 10-14-2008 at 06:37 AM.

10-13-2008, 05:12 PM	#2
Moy 3" Exhaust Join Date: Aug 2008 Location: Beach Park, IL Posts: 59	If you're getting the head machined and the block lapped, I suggest going with an HKS metal HG and ARP studs torqued to ARP specs. I think thats around 80 ft/lbs or so. MHG and ARP studs are the best way to ensure that you won't get BHG

10-13-2008, 08:03 PM	#3
CyFi6 3" Exhaust Join Date: Oct 2007 Location: SLO Posts: 234	dont bother with the MHG. You need to remove the engine and get it done professionally for a good seal. Get the head machined and clean the block surface well, no need to lap it, just get a real strait-edge and make sure its flat. I reccomend you get a full head gasket set, because most of the gaskets you remove are going to be very old and broken, so you need new ones. Try to find a "Stone" gasket set, ask your machine shop if they have that. First off though, make sure you actually have a BHG before you go doing all this. Is there any smoke? Is there any coolant in the oil/oilin the coolant?