Alright so i pulled the head off today, inspected the mhg and i think the whole issue with it was the fact the old owner, never properly seated the studs thus having them back out and not seal properly. I was literally able to pull each one out by hand. Looking at the gasket which measured around .065" it did not appear to be torqued at all, with no signs of actual bhg. Awesome.
Do i have bhg or bad turbo
- Thread starter 89supra7mgte
- Start date
Wow! That's crazy! Well, that makes two of us that have had major issues with our cars when purchased! Knuckleheads! 
.065" is 1.651mm. That seems like an odd sized MHG; but, eh...no biggie.
Ok. A couple of things...
Hopefully, you're still going to install an OEM HG. If not, your mileage may vary!
You'll need to torque your head studs per ARP's specs (found on their website) paying close attention to the type of thread lube you use. Then after 5 complete heat cycles, re-torque. And of course use the TSRM for your Head Bolt Loosening and Tightening order.
If you're using a Haynes or Chilton's Manual, please toss it in the trash. Or give it to a supra owner that you hate.
Also, don't forget to put dabs of your favorite RTV where the timing cover meets the block.
And of course replace those little 'This and Thats' along the way. Hopefully, some other folks will chime in on stuff I'm forgetting.
Good job and Good luck!!
.065" is 1.651mm. That seems like an odd sized MHG; but, eh...no biggie.
Ok. A couple of things...
Hopefully, you're still going to install an OEM HG. If not, your mileage may vary!
You'll need to torque your head studs per ARP's specs (found on their website) paying close attention to the type of thread lube you use. Then after 5 complete heat cycles, re-torque. And of course use the TSRM for your Head Bolt Loosening and Tightening order.
If you're using a Haynes or Chilton's Manual, please toss it in the trash. Or give it to a supra owner that you hate.
Also, don't forget to put dabs of your favorite RTV where the timing cover meets the block.
And of course replace those little 'This and Thats' along the way. Hopefully, some other folks will chime in on stuff I'm forgetting.
Good job and Good luck!!
My measurement might be slight in accurate, i wanted to measure but not put ant imperfections in it, both were about the same old and new, i think i might use the old one on my new block and headas to not change the cr that much but who knows that is later on. I was gonna send the head out for checking but when i took it off i started to notice that it wasnt even broken in, so my leak down test may have be misleading me. As for the smoking, i am leaning towards way rich, based on previous code problem and all the carbon sitting on valves, pistons and plugs, i have another afm that when all said and done will be up to par. I did take some before pics and will take some after as well and along the way. I decided to strip off all the old harness wrap to inspect and double check every wire going into the firewall not to mention it was falling apart.
Do you know of any way that i can clean out my injectors, other than good gas?
I am gonna do a little revamping to the harness and intake plenums to give it that little extra jazz, make for a nice clean engine compartment.
Got way off. I followed the specs to a "T" minus the arp lube was not accessible, i did use an equivalent though and torqued to spec i will for sure re torque after i get it running. Thanks for the help
Do you know of any way that i can clean out my injectors, other than good gas?
I am gonna do a little revamping to the harness and intake plenums to give it that little extra jazz, make for a nice clean engine compartment.
Got way off. I followed the specs to a "T" minus the arp lube was not accessible, i did use an equivalent though and torqued to spec i will for sure re torque after i get it running. Thanks for the help
One other thing I forgot to mention earlier regarding your EGR delete. If you still have your EGR stuff. Re-install it. It's removal yields minimal power gains and increases your chances of detonation. EGR is your friend.
There are a few options for the injectors.
1. Have them tested, clean, and flow matched. RC Engineering does it. You can go to their website for details. If I remember right, it was ~$24 per injector. There may be a company local to you that offers this service. There's a Diesel Shop here that does it.
2. I forget the name of it; but, there is an injector cleaner that shops use. When I was wrenching, we injected it directly into the fuel rail. Maybe a local shop can help you there.
3. Over the counter type injector cleaners. The kind you pour in to your tank. Results may not be what they claim; but, if that's all you can do...that's all you can do.
Option #1 will ensure reliability of your injectors and is a great aid in making decent power down the road.
One more thing regarding your MHG. If there is no damage, they can be reused; but, the Viton needs to be completely removed first. After removing it, it needs to be sprayed with Copper Spray. DO NOT spray copper spray on it without removing the Viton. Bad things will happen.
We all love to see pics. Post them up! And anytime you can improve on the look of the engine bay without compromising performance, it's a good thing!
And.....you're welcome. Glad I could help.
There are a few options for the injectors.
1. Have them tested, clean, and flow matched. RC Engineering does it. You can go to their website for details. If I remember right, it was ~$24 per injector. There may be a company local to you that offers this service. There's a Diesel Shop here that does it.
2. I forget the name of it; but, there is an injector cleaner that shops use. When I was wrenching, we injected it directly into the fuel rail. Maybe a local shop can help you there.
3. Over the counter type injector cleaners. The kind you pour in to your tank. Results may not be what they claim; but, if that's all you can do...that's all you can do.
Option #1 will ensure reliability of your injectors and is a great aid in making decent power down the road.
One more thing regarding your MHG. If there is no damage, they can be reused; but, the Viton needs to be completely removed first. After removing it, it needs to be sprayed with Copper Spray. DO NOT spray copper spray on it without removing the Viton. Bad things will happen.
We all love to see pics. Post them up! And anytime you can improve on the look of the engine bay without compromising performance, it's a good thing!
And.....you're welcome. Glad I could help.
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When i had the head the off i noticed the had already deleted the egr, took cooler off and installed block off plate.
So i am just gonna leave it like that for the time being. Starting the reassembly of the cams and timing belt hope it goes smooth then on o cleaning up the intake plenums and maybe exhaust manifold, might hold off on installing the turbo until i order the new oil feed and return set up it looks so much easier than stock not to mention i cant get this one to seal properly tried 4 times so i think its worth the investment
Turbo Soft Lines indeed make your life easier. Yes, they are worth the investment.
Don't know where you're getting them from; but, Driftmotion.com is a great place to get them!
Don't know where you're getting them from; but, Driftmotion.com is a great place to get them!
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Cool ill look there i seen them on suprasport for 160, little pricey but well worth it. One more thing about my old mhg, the viton i need to take off, is that only if it has started to come off in spots or just in general? Ill post a pic of the progress and of the gasket, if looks brand new not one single area of the viton is gone made for an easy head and block clean up.
If the gasket looks brand new. And I mean BRAND NEW! Like out of the package BRAND NEW! Is my point clear yet? Then it's probably ok. You'd have to ask yourself, 'If I"m building an engine to make good power, will this gasket wreck all my efforts, time, and money?' Really, that's a decision you'll have to make.
If the Viton is off in places, if it looks 'patchy', then I'd strip it and use copper spray. You'll never regret taking precaution. Especially, when it comes to the HG.
Pics are always good!
Then it's probably ok. You'd have to ask yourself, 'If I"m building an engine to make good power, will this gasket wreck all my efforts, time, and money?' Really, that's a decision you'll have to make.If the Viton is off in places, if it looks 'patchy', then I'd strip it and use copper spray. You'll never regret taking precaution. Especially, when it comes to the HG.
Pics are always good!
The viton is fully intacted all throughout the gasket, ill def inspect more thorough when i start that build and if all else fails i still have a brand new, in package up opened hks 1.2 that a can use. i am still in the process of uploading pics but they all need to be resized and pc is actin stupid with it.
So far i have the head on torqued down, cams installed with new cam seals, cam gears and timing all done and triple checked. Have lower plenum installed, decide to add some flare and paint it along with upper, fuel rail and valve covers. Just got done re-looming and cleaning up wires, could be better but a little sketchy on making it perfect only because some of the wires want to crack and i can not locate a new harness, either way all the wires are protected.
I am however lacking the connection of one connector, it is located towards the front of the intake with four wires, i believe they are red and black? when i pulled the oe loom off i made sure to keep wires and connectors in original locations, this one i am not sure if it goes underneath plenum or what, anyh ideas? its not the fuel psi up that on is connected but is roughly same area od engine just on top of lower plenum. trying to post a pic but having troubles.
Other than that its starting to look a whole lot better
So far i have the head on torqued down, cams installed with new cam seals, cam gears and timing all done and triple checked. Have lower plenum installed, decide to add some flare and paint it along with upper, fuel rail and valve covers. Just got done re-looming and cleaning up wires, could be better but a little sketchy on making it perfect only because some of the wires want to crack and i can not locate a new harness, either way all the wires are protected.
I am however lacking the connection of one connector, it is located towards the front of the intake with four wires, i believe they are red and black? when i pulled the oe loom off i made sure to keep wires and connectors in original locations, this one i am not sure if it goes underneath plenum or what, anyh ideas? its not the fuel psi up that on is connected but is roughly same area od engine just on top of lower plenum. trying to post a pic but having troubles.
Other than that its starting to look a whole lot better