Na Bhg?

[MKivSupra_Rob]

ok guys, what looks to be oil in the coolant overflow and also in the intake piping, is this a bhg?

[89Joe]

It is no doubt possible. When you drove it last did your temp. gauge spike at all? Check the dipstick for a milky substance, and do not run the engine until you found what was wrong. Check this out for further information. Also, has your HG ever been changed?
http://www.supramania.com/forums/showthread.php?t=251

[supramacist]

yes, it's a blown head gasket.

[supramacist]

You know if you have abused the car or not.

[dcrusupra]

yes, it's a blown head gasket.

Dont be so hasty lol. It could be any number of things. But check out what Joe mentioned to actually confirm that it is the BHG.

[MKivSupra_Rob]

I'll check over the Diagnosing a Blown Head Gasket thing and officially check, as for abusing the thing was driven pretty lightly, one owner before me who was an old gu ythat drove it to work and back.. onyl thing i can think of that was wrong with it is the bolts holding on the valve cover kept loosening themselves and oil would begin to leak.


dip stick looked fine and the temp didnt spike at all. also i havent noticed any white smoke (was parked until now)

[supramacist]

well...., if it's not blown this time it probably will be next time. The hks mhg's are less expensive than the greddy. They are both good seals. But..., if you aren't roll'n metal. You should be thinking about it. I just now wonder if there is a fuel conversion kit to switch over too diesel. The way my car drinks oil it would be extatic.

[89Joe]

On start up, do you hear a kind of waterfall sound coming from the dash? Also, check the coolent level, and if you run it smell for burning coolent (it smells like sugar or cotten candy.)

Check your codes!
http://www.cygnusx1.net/supra/techtip/engineerrorcodes.html

[MKivSupra_Rob]

the things so freaking loud i cant hea much of anything ill listen for it though, as for smell, no cat so ir already has a strong smell, ill check to see if it smells sweet though. and as for codes i'll check that out too. im a little scared lol. Im thinking i might just go to 7mgte and put a mhg in that... also what would happen if i were to just drive it with the mhg? not that i'm going to im just wondering. I'm assuming overheating due to oil in the rad and possibly something internal if coolant gets in wheres theres only supposed to be oil?

[fatality]

when I blew my HG, there was tons of white smoke coming out the exhaust (this is from the coolant/water evaporating that is in the oil).

also, look around the exhaust manifold, where the 5th and 6th cylinders are located, this is where the majority of HG fail on supras. sometimes there is coolant leaking out towards the outside. you might not be able to see this easily, so run the car around the block a couple of times then while running look at the engine and rev the engine by hand.

as stated previously, look for frothy coolant and frothy oil on the dipstick (goes with out saying, but dont open the radiator cap while hot).

the engine temperature gauge should be going buck wild, spiking up and down while driving, especially while idling.

good luck man

[1TuffSupra]

You should just take your car to a shop and get it checked for a bhg. That would be the easiest way to find out whether it is or not. Its a simple test, should be inexpensive

[daledoe]

I just went 7MGTE when I BHG. There was no point to rebuild.
Just look::icon_mad:
http://x12.putfile.com/11/32512005721-thumb.jpg (http://putfile.com/pic.php?pic=11/32512005721.jpg&s=x12)

[MKivSupra_Rob]

too bad ive already started all the bodywork now that the engines screwed


also im amazed with the help im getting from you guys, i was 100% sure id get the old "search button! repost!" stuff

[supramacist]

head gaskets anonymous. I need a 12 step program to help me forget about the hell that is my ride. puff, puff, give or some shit.

[MKivSupra_Rob]

lol, well i have this dye indicator crap and a light that will make my fluids glow if they're mixed and such

Oh, i checked my codes and there wernt any, so is this bhg really mild? because there's no sweet smell, exhaust looks about normal, cars running strong, temperature is fine.

[89Joe]

Can you confirm it was infact oil in the overflow?

[MKivSupra_Rob]

Can you confirm it was infact oil in the overflow?


Sure can, just as soon as the sun goes down. We borrowed this set from a friend inwhich you add this stuff to your oil, and it glows under this uv light, so anywhere that oil is leaking, or getting mixed into, will glow bright birght bright yellow. So i'm just hoping that overflow will stay not glowing.

[MKivSupra_Rob]

just checked, none of the oil that was indicated showed up anywhere but the oil cap.. so today it didnt get past the gasket? weirdness

[supramacist]

not really....., I have the same thing you do. Obvious oil in the engine coolant. If I average a speed of 75mph, my engine will expell up too 2qt's of oil in 200 miles. If I keep it @ 70 and under. It cut's that down to a half qt. every couple of days around town. I think you just have a bhg that is minimally blown. There is oil that has leaked all over the belly of the car down past the cat. I think instead of the rear main being shot....., wich was my initial responce, instead I think I have a leaky oil pan. Hard to say till I turn the wrenches.

[supramacist]

That's a good idea though. The luminesent additive to the oil. I didn't know if that shiat really worked or not. And it may take more than an idle to get the cars juices flowing properly. I'd get under it either after a trip or 2 round the block or I'd find someone who could rev it while I lie underneath and watch.

[MKivSupra_Rob]

That's a good idea though. The luminesent additive to the oil. I didn't know if that shiat really worked or not. And it may take more than an idle to get the cars juices flowing properly. I'd get under it either after a trip or 2 round the block or I'd find someone who could rev it while I lie underneath and watch.
yeah, i'll take it out for a spin before i paint the rims tomorrow if i have the time

[JAB89]

ok guys, what looks to be oil in the coolant overflow and also in the intake piping, is this a bhg?

First, about oil in the intake piping; Although this is not very nice, it is normal. Oil gets sucked in from the PCV pipe connected to the top of the valve covers. Caution: Do not seal this off in an attempt to stop it. You could add a catch can but let's not worry about that right now. Just leave it alone.

Now, about oil in the coolant; My son's N/A was doing the same thing recently. It was also putting out white smoke in the exhaust. There were no traces of coolant in the oil however (not sure why). So, I ran a leakdown test and found that #4 was causing a very small amount of air bubbling up in the radiator. I had a soda bottle on the overflow hose and found it would push out 1/2 cup of coolant while under pressure for 5 minutes. This was a small leak and probably preliminary to a bad one. Bottom line - BHG. However, I knew the HG had been replaced by Toyota a few years ago so I figured what have I got to lose. I retorqued the head and IT FIXED IT! No air bubbles and no more white smoke. At least for now. Time will tell if it comes back.

You might want to try the retorque. It is a pretty simple procedure and like I said at this point, what have you to to lose? If you do, remember to flush out your cooling system after since the exhaust gases from the BHG will leave some corrosive acid type stuff in the coolant. Good luck.

[supramacist]

Positive outlook, strong message. I'm thinking that this is one that the entire family can go to and be happy with. You guessed it..., two thumbs up, nice idea, seriously.

[supramacist]

tell us about your ride jab, get us a pic.

[MKivSupra_Rob]

First, about oil in the intake piping; Although this is not very nice, it is normal. Oil gets sucked in from the PCV pipe connected to the top of the valve covers. Caution: Do not seal this off in an attempt to stop it. You could add a catch can but let's not worry about that right now. Just leave it alone.

Now, about oil in the coolant; My son's N/A was doing the same thing recently. It was also putting out white smoke in the exhaust. There were no traces of coolant in the oil however (not sure why). So, I ran a leakdown test and found that #4 was causing a very small amount of air bubbling up in the radiator. I had a soda bottle on the overflow hose and found it would push out 1/2 cup of coolant while under pressure for 5 minutes. This was a small leak and probably preliminary to a bad one. Bottom line - BHG. However, I knew the HG had been replaced by Toyota a few years ago so I figured what have I got to lose. I retorqued the head and IT FIXED IT! No air bubbles and no more white smoke. At least for now. Time will tell if it comes back.

You might want to try the retorque. It is a pretty simple procedure and like I said at this point, what have you to to lose? If you do, remember to flush out your cooling system after since the exhaust gases from the BHG will leave some corrosive acid type stuff in the coolant. Good luck.


Makes sense, thanks so much! What should i retorque it too? (not sure if Na is the same as 7mgte for this)

[JAB89]

Makes sense, thanks so much! What should i retorque it too? (not sure if Na is the same as 7mgte for this)

I think the general consensus of opinion is 72 to 75 ft lbs with the stock Toyota head bolts. The Toyota TSRM calls for 58 ft lbs which is just too low. I torqued mine to 72. Understand that you must tighten the bolts in the correct sequence when doing this. Here are links to a Retorque writeup and the tightening sequence in the TSRM. You can click on the tightening sequence pic within the Retorque writeup and print it off to refer to while you are working. Oh and I did back off each bolt 1/4 turn (Max) before retorquing it. This breaks it loose first so the bolt is free when applying the new torque value. I used a torque wrench (the old pointer style) to break it loose because I was curious as to what they were set at. Most of mine were about 55 lbs but two were at 45lbs and one was at 20 lbs (pretty low, huh?). You will need a 10mm allan head socket for the head bolts. I picked up a set at Harbor Freight for $10 (link to a similar set here also). The set I actually bought is part# 35183 but I could not find it online.

http://www.cygnusx1.net/supra/techtip/head_retorque.html
http://www.cygnusx1.net/supra/library/TSRM/em/EM_55.html
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=93193

Now, if you are interested in also doing a Leakdown test, here is a link for that. I used a compression tester with a quick disconnect from Harbor Freight (link here also). The hose in the tester will screw into the spark plug hole and also snap into an air compressor or portable air tank. Plus, you also have a nice compression tester if you didn't already.

http://www.supramania.com/forums/showthread.php?t=2229
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=92720

Have fun and good luck.

[JAB89]

tell us about your ride jab, get us a pic.
Thanks for the good words supramacist. Not sure this is the thread for it but briefly, my car is a Burgandy 89 Turbo Targa 5-speed which I bought new. It is a cream puff that just turned 100k miles. Mods are minimal, K&N FIPK, 3" exhaust all the way with no cats, shimmed wastegate to 10.5 psi which resulted in, you guessed it - BHG.

[supramacist]

bhg's definitley suck.