7M BHG repair and rebuild

[Supradude7mgte]

Sup guys? im new to this forum and am a big participant in supraforums. I'm in the process of rebuilding the motor after a BHG. I have this posted on SF as well and want to share it with everyone here. I will go through the entire process with pics and whatnot. To the point

started tearing it apart to replace the BHG. So far its a PITA but its commin along. the guy that built it kinda pisses me off. he put the liquid gasket crap on the intake chamber to the manifold. things are chipped and the studs have come outta the head with the nut still on on some smaller things. random stuff as i go through.




This is before i touched anything.

thats what the coolant looks like

Mhmmm

and it continues......

theres that liquid gasket crap on the intake chamber

theres so many dam hoses, lines and wires everywhere

and thats the progress for the first day.

........End of the first knuckle bust session


couldn't sleep so i went down and start wrenching for like 4 hours or so just taking my time. everythings so dam ditry and ugh....



finally got the fricken intake chamber off

BHG might be in the 6th cylinder maybe...

next is the ignition coil removal.

mhmmmm i see some oil in 5 and more predominantly in 6

next is the cam position sensor and the thermostat

the turbo gaskets are like a brittle old man. flaking upon the wind blowing.

and thats the end of this session.

...............End of 2nd wrist snapping wrenching session

 

[Supradude7mgte]

so i get back home , and decide to take the turbo off, so after 40 minutes of knuckle bleeding cursing at the tight wrench space it pops off. and look what i found..................... hooray, a cracked exhaust housing.
i measured it and its a hair short of a sixteenth of an inch back and forth shaft play.

and on top of that, the bottom oil tube is so anciently heat rotted that i have to replace it, and as i go through the motor, i haven't had to use penetrator or hardly any elbow grease to get shit loose. nothing is torqued down to what it is supposed to be. can't wait till i get to the fricken head. the turbo bolts were prob at about 10ftlbs.................WTF?
im beggining to think that the guy that bulit this car short cutted so bad is some areas.

EDIT: or just forgot to retorque everything

oh and get this, the radiator hose on the right side of the motor is pinched to about 50 % of its normal capacity between the intercooler piping and one of the mounts.

and where it goes to the water pump, its squished on there so uneededly much..

GRRRRRRRRRRRRRRR


..................End of the third engine punching session



last leg of the teardown. I got it to where all i have to do is take off the timing belt and unbolt the head and pop it off.


well, as promised, things like this happened and the two dissimilar metals expanded and contracted with the heat and the aluminum pretty much welded itself to the bolt........

the intake manifold was kinda sticky taking it off. and the #6 intake port looks extremely mukked up

heres a close up

there is fricken oil everywhere....

AND Low and behold i see the ARP stamped on the bolts staring back at me!!!

i checked the torque on them and they are at ~90


and the plugs are just ugh..............all around.

..........End fourth session

 

[Supradude7mgte]

here are the pics of the front of the upgraded turbo

So after getting a breaker bar and a 8 foot pipe, i got all the headbolts off.
and heres whats up.

steam cleaned piston..................

like perfectly cleaned piston.

and then the head gasket.

..................End 5th session



< and now for the rebuilding part and parts collecting and cleanup.


Alright, just got the head back from the shop. They did awesome work and cleanup on it. I had them helacoil some bolts on the exhaust side and they made the gasket sealing surfaces so smooth.

and on the #2 piston from the front it looks as if the bearing blew on the rod and the piston was hitting the head, but thats the reason the motor was rebuilt in the first place because there was and is no signs of rod knock or anything related to that bearing blow. i checked the piston as well, and it was replaced with a new piston because there was no signs of anything on it. i triple checked the pistons up and down motion for it to be exactly equivalent to the matching piston down the block.

so now i wait patiently for all the new parts. im going to go to the HW store and buying new nuts and bolts and also anything else i need to rebuild the beast.


This is where i am at as of today. I picked the head up this afternoon and have just ordered most of the parts for the upper motor rebuild.

Ordered parts list.

Denso iridium spark plugs
Hose techniques kit red
Cam sensor dust cover and gasket
Silla replacement radiator
Red Silicone high heat radiator hoses
Beck arnley timing belt
Hood struts
Felpro Head gasket set

total = $685

shop cost for the head tune up and test $175

plus the nuts and bolts $75
all the brake and carb cleaner $15
14 t bolt hose clamps $40.99
red intercooler pipe couplers to go with the new intercooler next paycheck
knuckle busting wrench time $ow
the look on the mustang guys face when i completely demolish his point of living........... priceless


Input? Questions?

 

[Rennat]

looks like a fun little BHG job ya got on yours hands. double check the valve clearances!!! and if you can, measure the head to see how thick it is so you can buy a aftermarket metal headgasket.

 

[s000pra89T]

Good to see you on this side. Check out the Mideast Regional Forums...there's a few of us there as well.

Hope to see you around and good luck with the build! :bigthumb:

 

[cruisnhard]

At least the arps were torqued.

Looks like you a doing a great job of rebuilding unlike the other shortcutter.

Are you going metal hg or another composite.

 

[Bluechulappa]

Looks like progress. Hey I noticed the pic of your 02 sensor where you said "Mhmm" does that mean you need a new one?

 

[gtsfirefighter]

Supradude...dude! You should have just pulled the motor and then taken it apart. It's so much easier outside of the car. Just unplug the harness from the ECU, undo your fuel lines, oil cooler/tranny lines, grounds and motor/tranny mounts and it'll all come out in one beautiful piece. It saves the knuckles too for the most part.

Oh did you ever find out what trim your turbo is?

 

[Nick M]

Good to see it is going to get restored, at least from an engine point of view. Are you going to use the Toyota engine overhaul gasket set? It is pricey, and has a headgasket in it. But it also has everything you need.

The FIPG only goes on certain spots, and the oil pan.

 

[Supradude7mgte]

Good to see you on this side. Check out the Mideast Regional Forums...there's a few of us there as well.

Hope to see you around and good luck with the build! :bigthumb:

What is Up Man? Yeah i see alot more activity on this forum, because i sit and worship these kinda sites.

At least the arps were torqued.

Looks like you a doing a great job of rebuilding unlike the other shortcutter.

Are you going metal hg or another composite.

yeah the arps were annoyingly hard without air tools.

http://www2.partstrain.com/store/?D...matchallpartial&N=4294965614+1725+11790&Nty=1

that is the one that i purchased. Third down from the top

Looks like progress. Hey I noticed the pic of your 02 sensor where you said "Mhmm" does that mean you need a new one?

Well it was white from all the coolant that vaporized out of my exhaust, it could be a little "sluggish" now.
i will be keeping a close eye on it when its back in to make sure.

Supradude...dude! You should have just pulled the motor and then taken it apart. It's so much easier outside of the car. Just unplug the harness from the ECU, undo your fuel lines, oil cooler/tranny lines, grounds and motor/tranny mounts and it'll all come out in one beautiful piece. It saves the knuckles too for the most part.

Oh did you ever find out what trim your turbo is?

Dude........ i am funding limited here, no cherry picker or motor stand. im workin wit what was given to me.:naughty:

and no sir i didn't, thats why i joined this forum as well, i was just about to post it here.

Good to see it is going to get restored, at least from an engine point of view. Are you going to use the Toyota engine overhaul gasket set? It is pricey, and has a headgasket in it. But it also has everything you need.

The FIPG only goes on certain spots, and the oil pan.

Na, but same thing applies as one of the previous questions.
Follow the link.

I didn't want to use a metal headgasket, i wanna say that i would feel safer with the composite.


Heres the List
Ordered parts list.

Denso iridium spark plugs
Hose techniques kit red
Cam sensor dust cover and gasket
Silla replacement radiator
Red Silicone high heat radiator hoses
Beck arnley timing belt
Hood struts
Felpro Head gasket set

total = $685

shop cost for the head tune up and test $175

plus the nuts and bolts $75
all the brake and carb cleaner $15
14 t bolt hose clamps $40.99
red intercooler pipe couplers to go with the new intercooler next paycheck
knuckle busting wrench time $ow
the look on the mustang guys face when i completely demolish his point of living........... priceless

 

[irocznissan]

hmmm i think u would feel safer with the mhg BUT then u are gonna have to spend more money and at least clean the motor deck up. nice job u have goin here man.

 

[pgiller]

Great work!Very useful info for newbies.

 

[Supradude7mgte]

Great work!Very useful info for newbies.

im a noob myself man. this is my first supra project. I have reasearched everything i could about this whole project.

im giving it everything i got man.

 

[Who]

From one lurking newb to another. I have done a lot of reading myself on SM. If you do not prep or lap the block you should not use a MHG. The composite HG is much more forgiving to imperfect surfaces and will hold up to high HP as well. Hopefully one of the senior members will chime in with their opinion.

 

[Supradude7mgte]

From one lurking newb to another. I have done a lot of reading myself on SM. If you do not prep or lap the block you should not use a MHG. The composite HG is much more forgiving to imperfect surfaces and will hold up to high HP as well. Hopefully one of the senior members will chime in with their opinion.

yup. but i am lappin:icon_bigg for the hell of it


i found out this:
quote.
I would say the compressor is a garrett 60-1 and the turbine is a garrett stage 3. As well as the CHRA. To be honest, those wheels are a bit too much for how small the housings are. The only good thing about it is that they didn't leave the stock turbine in - which is a gauranteed problem with that compressor.

I'd run it until it blows up.

 

[Nomad707]

Looks very nice man.. it looks also like it was recently gone through.. the head isnt oil stained gold yet. and no, everything in your car is NOT dirty.. trust me.. all of your parts are cleaner then an elven ass. (compared to one of my supra's when i got it.
Check it..

THAT IS DIRTY..

But this is after.. lol.

BUT.. it looks like you are doing everything with detail and you arent taking any shortcuts.. Great job so far and keep up the good work :icon_bigg


Ill be watching!

 

[Nick M]

I have a Fel-pro headgasket unused in my garage. Good choice. It looks disturbingly (in a good way) like the Toyota gasket. I wouldn't be suprised if Fel-pro supplies Toyota of North America with them.

 

[Supradude7mgte]

Looks very nice man.. it looks also like it was recently gone through.. the head isnt oil stained gold yet. and no, everything in your car is NOT dirty.. trust me.. all of your parts are cleaner then an elven ass. (compared to one of my supra's when i got it.
Check it..

THAT IS DIRTY..

But this is after.. lol.

BUT.. it looks like you are doing everything with detail and you arent taking any shortcuts.. Great job so far and keep up the good work :icon_bigg


Ill be watching!

hahaha omg man, that is soo dirty. Did dude go mudding in that thing?
at least i can fry an egg on my turbo and feel safe eating it.

i feel that it is pointless just to rebuild it. I feel i must care for and love the motor like a son. haha
but in the end, that little extra love can go along way into preventing future breakdowns of my baby.

know what im saying?
but yes.
i still wait patiently for all the parts:runaway::eek3dance

 

[Supradude7mgte]

I have a Fel-pro headgasket unused in my garage. Good choice. It looks disturbingly (in a good way) like the Toyota gasket. I wouldn't be suprised if Fel-pro supplies Toyota of North America with them.

i hope its not like the toyota HG though

cause 10,000 miles down the road
=
::bhg::

give or take............

EDIT: this is my opinion. Not factually true

 

[gtsfirefighter]

i hope its not like the toyota HG though

cause 10,000 miles down the road
=
::bhg::

give or take............

Well you obviously do not have a stock CT 26. A Toyota hg is just fine in a stock application. There's plenty of people here using one with the boost turned up a little and no issues.