Kevin's 7M low hp build

[Kevin]

i might aswell start a thread.

background on car.
1987 turbo.
bought in may 2009
bhg.. 3 months to change it.. (im just a student. and i dont live with my parents anymore..) i had no garage so i borrowed a friend's.. but his house was A LONG WAYS AWAY. so i could only work on the car like once a week for a few hours at a time. anyway.. i was real poor and i couldt afford to get it done right... i threw in a stock hg and arp bolts. torqued it down and called it a day.. i didnt machine nothin. today she still runs ok.. other then a crappy idle.. due to the fact that i am an idiot i had the valves out and i flipped over the head and accidentally mixed up all the buckets and shims.. LOL dont yell at me.. im just learning as i go. plus that was when i was new to supras and cars for that matter.

this time.. i wanna do things right.. i have a spare engine.. and i will take my time get the head and block machined.. new bearings and whatever else i may need.

heres pics of the engine

I'll have it on the stand tomorrow when i get bolts (u probably saw my other thread about the bolts lol)

just a few moments ago this happened..

http://www.supramania.com/forums/showthread.php?t=116116

sucks lol

more updates to come.. will have tons of pics hopefully

 

[suprahero]

Good luck with the build. It's easy to make low horsepower with the 7m..........:biglaugh:

 

[karlmk3]

have fun enjoy and learn while you go


what low hp to you ? cause to me its 300 whp

 

[Kevin]

whatever i can get with stock everything other than intake and exhaust.. ebc, apexi afc neo,

 

[xzeror]

good luck with the build :]

 

[Kevin]

update!
I got the head off today and a few other mics items i'm pretty amazed at how easy it is to work on an engine outside of the car. this is my first.
i also made sure i had plenty of ziplock bags and marked each one for bolts and random stuff this time. (last time i didnt.. lol it was a nightmare)
i am suprised at how fast i got everything done, being prepared.. unlike my last hg which.. i was totally un prepared.. unfamiliar..and took forever.. and i fucked up alot lol... i even bought another shelf unit so i can put more parts in an organized mannar... i think it took me longer to put the shelf together than to strip the head and remove it lol here are some random pics

it feels good to be organized for once.. ( i am not an organized person at all... i'll take a pic of my tool box tomorrow to show u guys lol)

the head gasket actually doesnt look soo bad.. compared to my last hg.. (i'll try to dig up a pic)
ohwell.. gonna go mhg anyway.

hmmm.. now i need to get the crank bolt off somehow..\anyone have any suggestions on how to do this.. when the engine is on the stand.. ?

 

[IJ.]

Chain from a flywheel bolt and around the leg of the stand.

 

[Moy]

buy a tool, it's like 60 bucks if you get it on Amazon: Schley 64300

I used that along with two breaker bars to break the bolt free. Works great

 

[Kevin]

buy a tool, it's like 60 bucks if you get it on Amazon: Schley 64300

I used that along with two breaker bars to break the bolt free. Works great

how did you use two breaker bars at once? lol

 

[gaboonviper85]

how did you use two breaker bars at once? lol

just pull the oilpan off and jam a 2x4 between the crank counter balance and the inside block wall....then use a pipe over a wrench to break the bolt loose...real easy stuff.

 

[Kevin]

update. oilpan off. powersteering, waterpump, a/c and a few other misc things off.

now i have to tackle the crank bolt ...

gonna save it for this sometime week. sprayed some liquid wrench on and around the bolt last night and tonight. gonna repeat so to make sure it soaks in lol

 

[Kevin]

tried the 2x4 and breaker bar method.. and failed lol.

i couldn't find my 1/2" drive 19mm soo i had to use a 1/2" ro 3/8" adapter with my 3/8" 19mm deep socket.. im an idiot lol
anyway. i ended up twisting the adapter

yay!

anyway.. after a little bit of swearing. i called up a friend and borrowed his impact gun and 19mm socket. took a little bit but finally got the bolt off!!
started pulling the rods and main caps out.. inspecting the bearings i was supprised at the condition.. they dont look too worn at all especially for a motor with suposedly 290000km's on it
i will be replcing the bearings anyway

more pictures later

 

[IBoughtASupra]

Make sure you don't mix up the caps. Each cap must go back to the rod it came off of. You can label it 1,2,3,4,5 and 6 from the from of the engine. if you mixed up the buckets and the shims, it is no problem. Put in each bucket and shim and then measure the clearances after you torqued down the caps. Turn each cam and check the clearance under each lobe. It should be between .08-.12 on the Exhaust side, I like to keep it in the middle at .10. The Intake side should be at .08 thou, .06-.10 is the range, try and keep it in the middle.

After you do that, some should be extremely tight and one should be loose, so them you can mix and match the shims, not the buckets. When you place the buckets in the holes, it should slide down simply without forcing it down. Oil will be your friend. PM me for any questions.

Trust me, I know about the crappy idle. We sent my first 7M head to a machine shop and they mixed up all the valve shims and the engine would raise between 600-1,200RPM and then die. It had to vaccum leak because we made sure of that, silicone on every gasket where possible. We even smoke tested it. I did the shims on the head by myself, after getting new ones from GoodSon Engine Builders and it worked fine. The clearances were up to .16 on the exhaust side which were horrible. I knew to myself it was the shims because when an engine warms up, parts expand. When that happens, the clearances between parts become less. So, the clearance would decrease and approach back to stock specs but not exact, and guess what, the engine would run better. After doing the shims, everything was fine and we sold the car.

We sold that car and the people are rebuilding the engine. Why? I have no darn clue. It had all new parts. New oil pump, water pump, stock NPR piston and rods, full gasket set and new bearings with the crank cut .10 under. We sold it to a 16 year old kid, whose parents bought it for him, so he must be new to cars. I have no clue what is going through his head. Probably let the oil go low and rod knock.

 

[Kevin]

update: head gasket came in.. nicely packed between two planks of plywood as to not damage it
still waiting on bottom end parts. so basically projects at a slow-standstill.
im cleaning parts here and there. sanding and painting valve covers, etc

 

[stolensupra]

Good Luck on your build bro. Dont know that I would jam any kind of metal rod into the engine to get the crank bolt off. Goood call on the impact wrench.

 

[turbotom88]

hey Kevin, did you get the afm yet?

 

[SupraBro]

lol...i was in the same boat as you with the crank bolt...i was lucky and had a extra one and a lower cover...lol

 

[Kevin]

hey Kevin, did you get the afm yet?

no not yet :S



update: so.. just trying to tie up loose ends.. started putting the valves back in the head.. WTF!!!! took me 45 mins for 2 VALVES!!!!!!!!! fucken keepers are nearly IMPOSSIBLE!!!!!!!!!!!
is there some kind of secret way to get them in????

on a side note.. got the pistons cleaned.. oven cleaner works sooo well for removing carbon.... i'll get pics up as soon as i get my hands on a camera

 

[Kevin]

update with some pics!! (finally got a camera lol)

so far i have the crank in with new acl bearings

made sure to use PLENTY of assembly lube.. mmmmm royal purple

here is how the head looks after machining

as you can see.. i have two valves, cuckets, shims etc.. in
i started on the next... but got too pissed off.. really.. how the hell do you guys do this?!!??

heres the block after machining

i cleaned the pistons oven cleaner works the best!

painted valve covers

orgaization ftw

how my car sits now.. (such a nice day out. 17 degrees C!!)

 

[Kevin]

some more stuff going into the car soon
255 walbro

apfr

apexi afc neo

valve cover bolts

boost controller and turbo timer

560cc injectors

new injector clips

lexus afm

more to come