So obviously my oil problem is only getting worse, I decided it's finally time to do something about it.

so I went and picked up Defgeph's old 7A...
177,000 miles and was begining to use some oil before he swapped and it sat in the garage for 2 years.
but since I was getting it for free from a friend I decided to pick it up and hope for the best...



so I picked it up Fri (8/24) and the next day it came with me to work (I work at a Toyota dealer) where they unloaded it into the brake lathe room and it stayed hidden for a while. this past Saturday (9/8) me and one of the techs began tearing it apart. I was pleasantly surprised to find that it is actually in incredibly good condition for its age...

I will be spending close to $500 in parts replacing every bearing, seal, gasket, etc that we can think of. What I need from you guys are your suggestions as to what I can do to make this motor a little stronger and better flowing. I'm keeping the stock pistons and considering bigger cams and having the head machined.

We work for about an hour each morning before customers start coming in. Between Sat, Mon, and Tues (today) we have everything pretty much apart (except for the valves since I haven't decided to send them to the machinist with the head or not yet). This is a huge learning process for me and happy to have the oppotunity to do it. I'll add more pics and info so maybe some of you can learn some things too.

This post has been edited by hurley97: Mar 6, 2008 - 9:09 PM

My suggestion if you want some seirous power would be NOS. mos Def like a 100 or 150 shot. yeaa. nos..
maybe a couple stickers to help with the throttle response too. and def get some of those turbonator eletric turbo things from ebay, they are rated for like 30 hp!




I take it the new job is going well?

Looking forward to reading this thread

(You should tuck your bay when the engine is out )

This post has been edited by jcbass7: Sep 11, 2007 - 6:28 PM

shave the head a bit, 3 angle valve job, MAYBE a light port, ported TB+ IM, exhaust, intake, a little SAFC tuning.. and hey, you may make 115whp or so steff.
fun project, ill be looking forward to up close updates!

OOOH BOY!! Ive been looking forward to this project. Some suggestions I have are shotpeened rods($60 is what i paid), umm i had an idea but i forgot it, im sure it will come up some other time.
Good luck on the project

>


I agree, when i shaved my head i gained atleast a couple tenths in the quarter... then i shaved my legs but didn't notice as much of an increase

But seriously, im excited about this thread, and i like manny's ideas above^

turbo?

head swap?

since your prolly gonna have this car as a DD i wouldn't recommend going wild with cams as it lessens the drive ability of the car, open up the head some, if you have access to or know someone who builds engines you could have them freshen up the lower end to whatever degree your looking to spend on it. if i were you, id also clean the HECK outta the engine and paint it up, maybe a flat black block and head then a dark green valve cover to match the body of the car, also do the im along with them heat shield in black too.

performance, as i stated before this company called alabama heads does some good work, you could send the one you have to them and have them do whatever work you'd like to whatever spec, and also they can put some new parts in too for longer life. get some high comp pistons, but not too crazy.

also get a stronger clutch for more fun shifting. and possibly a lighter flywheel, but again for drive ability, not too light with too strong of a clutch

have it all balanced, that'll make it run alot smoother and make it a more pleasant car to drive.

knife edge the crank.

you wana lighten up the bottom end as much as possible, this will give better acceleration (less rotational mass) and better throttle response.
and as previously stated, balance everything and have the head opened up. though i'd leave the cams alone. it wouldn't be worth the $
oh and run a thinner head gasket if you can or if there is enough combustion chamber room, have the head milled down slightly to raise the compression a bit.

This post has been edited by playr158: Sep 12, 2007 - 9:20 AM

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love the steering wheel.....

Steff I'm really excited to read this thread as you do this rebuild.


My request is a pic of how clean Jeff's engine is.

Also- did they figure out why his was burning oil?

wow..our engine is tiny. good grief.

good luck! i hope all these suggestions work to your favor for your celi

Awesome, the 7A actually fits in the front seats lol. Goodluck with the build, only thing I could think of is to get the engine balanced and to do a 3 or 5 angle valve job and port and polish the intake and exhaust and match that with the manifolds so it would breathe better.

you can do all thats listed above ^ great suggestions.
with the head shaved, and advanced timing 93 octane would be a requirement. gasket match/port everything. light weight flywheel. adjustable cam gears possible gains there, rather than aftermarket shafts.

Oh and a thermal barrier intake manifold gasket.

maybe add another 7a to power the rear wheels too.

This post has been edited by x_itchy_b_x: Sep 12, 2007 - 3:32 PM

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adjustable cam is a very gray area, since the 7afe works on a Slave cam style setup, you can't change the cam gears individually

I believe she will be building this engine for a turbo set up in the future.
Bumping up compression would not be a good idea.

Rebuild, valve job, & port the head. Port match the intake & exhaust manifolds. Grind the cast markings off the head ports and combustion chambers. Lightweight flywheel with a street clutch. See if you can find someone to shave some weight off the crank.

Look into new cams or regrinds. Don't bother with the gear.

Put that turbo kit in, you'll have some nice results.

Can't wait to see how this project unfolds!

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hehe totally forgot about the turbo down the road, jeff..lol
nix the shaven head.
do they make a metal headgasket for the 7a?

We could have one made. I'd like to make one twice as thick as stock.

>
believe it or not Manny the OEM 7A headgasket is metal



anyway, I know everyone wants to see pictures...

First we separated the head and the block
like I said Jeff's engine is incredibly clean and I wouldn't have believed it has 177k miles on it
[looking at the picture below] I want to know what I can and can't shave off/ smooth out on the head








and the block

^notice the dirty pistons above, soon there will be a picture of them cleaned up a little

now with the pistons out

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yes. things that were wrong with the engine:

1. the oil control rings were just old and worn and got gummed up with oil so they sunk into the piston and since they didn't sit where they should oil just went right past them and got burned on the cylinder walls.
the oil control rings...

sit in the bottom groove of the pistons...

and are held in place by another ring similar to the compression rings (shown below. they go in the two top grooves in the orientation shown) but are a little thinner


2. the thrust bearing was a little worn and had some play. this was just due to the added strain on the crank from it being attached to a manual transmission.
the thrust bearing...

sits on either side of that middle seat in the grooves on either side




all the other bearings and seals were in pretty good shape, although I am still going to replace them all

awesome! thats a pretty big crank, i was surprised. very clean, esp the head.
you guys arent waisting any time either jeeze.

Thats awesome ! This is a project I have been wanting to do for years. I'm happy to have donated my engine to your cause

Keep the thread flowing like this. Its great to see what was the original problem, and what other parts started to fail because of it.

Take pictures of the intake and exhaust posts on the head once you've cleaned them up. Also, take pics of the bottom of the head.

Nice thread

im going to take a guess and say you used mobil1, jeff?

ON A 7A! Are you crazy ? Just used regular sludge for that engine.

hey, this is very interesting for me cuse i am on the same route, how much NA power can u get out of a 7a. Well i really look forward to seeing pics of your progress. Hope all goes well. My two cents, if you have the money send the head of to Extrude Hone, its a process where they push an abrassive material through the entire head (Intake and Exhaust) and it polishes the sharp edges, increases flow and helps for breathing, the process costs $650 for our head, ive called them before to find out. Let me know if you need more info. Good luck

Matt

I can't wait to see how this turns out. Looks like fun.

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and it looks that good? crazy. guess all the oil brand debates just got thrown out the window.

stef, i dont know how crazy you want to go with this build up, but if you are really planning to turbo, i would upgrade the pistons, rods, and headgasket, and do the cam regrinds, as well as replacing any rubber seal/gasket. then you would have a strong and nice flowing motor thats ready for the abuse of a turbocharger.

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wow... thats an insane price for that. we already did that this morning, took about 20 mins. I'll have pictures soon.

I spoke to a friend of another tech about machining the head and it sounded like all he was going to do was clean it and make it look pretty and charge me $70. its not that dirty, we can clean it at work. if we have the right tools to port match the intake and exhaust we'll do that ourselves too. I can't imagine a 5 angle valve job being too precise either in which case we can probably do that too. we'll see how it goes