The 7M "ZooLoo" Modification, and... Danny plays with Blocks (!!!) - Cylinder Head Rebuilding part 5

The "ZooLoo Mod" gets is name from a Swedish dude (with a freaking gorgeous mk3 should I add!!!) who was one of the first to do this and make it mainstream. You can find his original posts about it on SupraForums: www.supraforums.com/threads/h...
Other mentions of this mod show mixed / inconclusive results:
www.supramania.com/forum/threa...
www.supraforums.com/threads/s...
so I will let you know what differences (if any) that I see now that this is complete!!
Supra Saga Videos:
Part 1: Discovering the problem: • Lessons Learned !! Sup...
Part 2: Rebuilding my 7M Cylinder head, part 1: Cleaning and Preparing to Straighten • Rebuilding my 7M Cylin...
Part 3: How to straighten a cylinder head, the less invasive way. • How to straighten a cy...
Part 4: Test Fitting the Cams after straightening: • Test fitting the Cams ...
Part 5: Rebuilding a Cylinder Head part 2: Polishing the Journals and my NEW CAMS!!! • Rebuilding a Cylinder ...
Part 6: Cleaning the oiling ports and making them serviceable: • Rebuilding my 7M Cylin...
Part 7: Valve Adjustment: • An Exploration into Ma...
Part 8: This one!! The ZooLoo Mod!
HUGE THANKS to Danny Soliz of Hill Country Performance!
Background Music is: "Nappy Is The Gold" by Brentin Davis
www.pistonsandpixiedust.com
IG: @pistonsandpixiedust
FB: @pistonsandpixiedust
... and just for comparison,
here are a couple other great videos on this topic: • Built 7MGTE 'ZULU' mod. (this one is very long so I started it at 18ish minutes! This guy uses just a drill bit on a bench, so this is totally doable at home!)

[@t.s.racing]

Faye, much respect for you and Danny. As a veteran Race Engine Builder and Machinist, ask Danny if he is familiar with the term, " dry decking a block " ? This procedure will be much more beneficial for a high performance application especially if you are running high compression and or boost, or even just a larger bore diameter to prevent cylinder distortion. I may try and do a video myself on the procedure. You guys are EXCELLENT together, great job. SARGE BULLDOG.

[@802Garage]

Very nice! New hotness for EJ25 turbo Subaru engines is the cylinder 4 cooling mod. Basically uses an existing tapped hole and adds an outlet port for hot coolant. The other bank already uses the outlet for the turbo, but the driver's bank doesn't use the outlet. Pretty cool.

[@FayeHadley]

Yes!!!! I was just talking to my friend Josh (the guy who doesn't the powder coating!) about this upgrade and he was telling me about this on his WRX!!! So cool!!! Just another way that this build applies to so many more than just 7M folks!!!👍🏻

[@erich9244]

I want to see a time-lapse of that for sure!

[@Adrian-rn1ym]

Wow she’s one in a million , hot , great personality and loves cars and trucks !!

[@fourocker]

Subbed, I just had a forged rebuild on my 7mgte, got the engine machinist to check out the Zulu mod and he was pretty interested to see it for himself, took nearly a year through covid to get it done and now it's in the car, I have 800km on it LOL.

[@isaiah4510]

Love the collab’s with Danny! Keep up the good work Faye n Danny

[@LurkMoar101]

I miss our old Bridgeport. The things you could achieve with one of those old timers. Aluminium facing and crc = mirror finishes at the right speeds. Manifold facing and chamber mods, easy peasy. Plus, you should ask Danny how muany times hes spun a milling tool into one of those clamps. I'm guessing a few. You haven't lived until you've flung one of them across the workshop at high rpm.

[@justinraymond6411]

Hello faye hope you are staying safe out there my favorite mechanic

[@justplaintommy63]

dude, I haven't turned a wrench in years, now you got me watching all this cool stuff and I'm itching to build a truck

[@anthonyray5515]

Danny: Bridgeport, cause this is a professional shop. We do things the right ways. ;) Without blocks the bit could cease and break damaging the head permanently. Professional job. ;)

[@FayeHadley]

Always professional, Anthony!!!😅👍🏻

[@anthonyray5515]

@@FayeHadley 💓💕❤💗💞💖💛💙💜💚

[@TeonCyndi]

awesome my thirst for 7m content has been filled yet again

[@FayeHadley]

Haha thanks honeybunns!!!😅👍🏻

[@juliuswolbrueck4609]

I remember playing with blocks like those when I was a machinist. If it's not a customer's head you tighten it down good or use 4 clamps and use an end mill and a hand on each crank and pretend you're a CNC.

[@krisossorio1385]

Recently found your channel! Been binge watching all your videos, You are what makes KZbin awesome 🤙

[@nickd920]

Its awesome watching a lady auto tech working. Her hubby is lucky.

[@onhawaii]

Oi Faye! You actually don't want it open to big. 2 max. 3 holes that are 5-6mm should do the trick. Because you see the return lines are right on the other side. Toyota closed that to avoid that the water just straight there and reduce cooling on all other cylinders. The rule of the flow with the lowest resistance will give you the hint. There are a few that done it this way and figured it out the hard way... NO BUENO! The thought about the ZooLoo (Zulu) mod is that the last cylinder is the problem child because it gets less cooling because of the blocked cooling passage. Like this opened up all cylinders will run hotter but the cylinder nr.6. My 7mgte expert recommends 2 5mm holes on this mod. not more. That is plenty cooling to avoid the head gasket blow on the cylinder and allows resistance to let the other cylinders to continue the cooling. Also when you open it up you get a weak area and some get cracked cylinder heads right there.

[@needmetal3221]

I never thought of using a drill for side cutting. Learn something new every day.

[@FayeHadley]

Me neither!! Now I have a reason to save all my old drill bits! :)

[@needmetal3221]

@@FayeHadley I've found that dull high speed tools work well on aluminum. Carbide too sharp.

[@projectmustardseed857]

Thank you... It is great watching your videos because it is genuine with no pretense or B.S. You and Danny complement each other. Both Danny and you are real because you both know what you are doing. It is nice to watch state of the art innovation from true artists.

[@FayeHadley]

Thank you so so much, this means the world!!

[@stephenmoxley3004]

Wow...that's a really cool mod, to get more coolant flow through the engine. I'd love to see a time-lapse of you putting the head back together. This series has been super informative. Thanks for including the chickens.

[@FayeHadley]

Haha no problem!! Glad you love them as much as I do!!

[@nobodyimportant8695]

That Bridgeport Mill/Toolmaker is a classic! love it!

[@littlerabbit4376]

Right on Faye! Time lapse would be cool .... nice chicken scratchin’ 😂

[@thedudegrowsfood284]

Thank you two for another great shop video!

[@bechtoea]

Now, after all of this, you and Danny need to do a sit down interview. Danny is such a wealth of information and a great PR tool for their shop.

[@FayeHadley]

YES!!! WE DO ALL THE TIME!! Tune in to our Livestream this Friday 3:30 central!!

[@zh3497]

I am here showing Danny some love. Seems like the type of dude if you know everything he'll still show you something new.

[@FayeHadley]

SO TRUE!!!!

[@littlekahunas7779]

Awesome show as always

[@coronalight77]

Man I wish I could download Danny's brain to my phone! To hell with Alexa we need Danny! Thanks Faye for making stay at home enjoyable! Love you guys SA proud! And yes to the time-lapse vid!

[@coronalight77]

And the bird looks like Bob Ross!

[@FayeHadley]

@@coronalight77 HAHAHA OMG SHE DOES!!!!

[@ProstWithTheMostBabe]

Thanks so much for all the content!!! Danny is a gem for sure!! Be sure to get him a case or two of beer!

[@FayeHadley]

I absolutely will!!! I split all of the Livestream profits with him as well 🙂👍🏻

[@CurtPottorff]

Won't lie, once I saw the Bridgeport, I got excited. I have a very fond love for that machine!

[@773BangLS]

Another video it’s great seeing you every day so far.... still waiting for some posters.

[@robertbonner5973]

Awesome wealth of knowledge here! Thanks for sharing your super Supra engine build !

[@mikeaho4143]

Thanks for the update Faye. I was wondering about the burrs also once you finished the video. I presume we'll see that next time.

[@FayeHadley]

We may!!;) Depends on if Danny will let me show that part since it's a little unorthodox 😅

[@xxpatentpending12]

Come for Faye, stay for the chickens!!

[@FayeHadley]

😂😂😂😂😂😂😂

[@nooneusesthisname]

Loving these vids. I know it's too off topic for this chan, but if Danny ever starts his own, I'd love to get a tour of those milling machines.

[@hifiman4562]

"He didn't expect it to be that nice." 😅😄😂😄😅

[@stephengillan8601]

Another fascinating vid, thanks!

[@chrisboyd4433]

I'm thinking a full-time web cam for the chicken run. Sort of a meditation channel for those of us who are home isolating.

[@FayeHadley]

I have seriously considered it my friend. I'm not even kidding!!! Will you join us Friday? You doing okay??

[@chrisboyd4433]

All is well up here in the wilderness of Maine. I work in the hospital, so this is the calm before the storm for us. Our "curve" is just getting started. I NEVER miss a Faye Hadley video. (Even if you are a Toyota person, rather than a Subaru person.) And yes, you do get points for starting your journey with a Subaru.

[@jaysoneubanks579]

Keep up the good work.

[@1977jelliott]

We call them transfer punches here, transfers the centre of a hole.

[@georgevaldez1449]

Awesome vid.

[@gpam03]

Another great video, Faye, you and Danny are awesome together. Dave 🇦🇺 Australia 🇦🇺

[@jimpoteet1]

love this... (faye, you are gonna be famous...) great machine shop... wish i had a mill like that...

[@marcoescobar3262]

Danny and you are very inspiring ... you have me thinking my extra 7MGTE needs to be shipped to you guys for machining , it’s very hard to find a shop that does good work out here in Cali

[@FayeHadley]

Reach out to Aaron of driftmotion! He may have good advice for you!

[@NewJerseyTom]

Ty...for the Love...my BFF in the shop Toyota master from dealership...and now so under paid ..working the discount tire chain.14.50 an hr...and no work

[@petemiller6051]

Look like the ZooLoo mod will give you a well deserved increase in head cooling. I would rather see a real time assembly of the head. Hey we're all in Covid19 quarantine, we got plenty of time.

[@Integrity.is.everything]

Zooloo is a play on Zulu, the legendary warriors of Southern Africa

[@mycool8980]

Good ol Bridgeport that brings back some nostalgia from my high school days. Heck i Still use the brass hammers I made, can't beat quality craftsmanship lol

[@StraightLineCycles]

Killer series

[@B._Smith]

Flow will find route of least resistance. That may.have been blanked off to force flow to the rest of the head. Maybe not. ✌

[@gailtaylor1636]

Exactly what i was thinking. I would have only done a couple 6mm holes to allow any air bubbles to get out.

[@FayeHadley]

@@gailtaylor1636 We will have to wait and see!!! I am curious as well!

[@SylasG]

Faye with the guns!

[@FayeHadley]

HAHAHAHAHA

[@NewJerseyTom]

Keep up the great work both of you guys have great chemistry... big future for both of you♡♡♡...Tom From New Jersey ♡♡♡

[@NewJerseyTom]

Ty..stay healthy dad of 2

[@JDWorkshop-wn9tt]

Always interesting!

[@S_p_a_r_k_y]

👍 Thanks another cool video!

[@baby-sharkgto4902]

Cool peeps these two

[@TheSaxon25]

Hit us with that time lapse! 👌🍻

[@FayeHadley]

YESSIR!!!!!

[@VatoMX]

Faye "Nothing better to do, so your playing with blocks?" Danny "Yeah?!"

[@FayeHadley]

😂😂😂😂😂

[@jozsefizsak]

Much appreciated!

[@jamest.5001]

I want to see it all!

[@toolmanlance]

Great video! Thanks for keeping people occupied during this quarantine. Can you maybe do 10 videos a day though? 10 minutes a couple times a week just isn't enough. 😁🖐

[@FayeHadley]

😂😂😂

[@michaelparker6412]

Hey ask Danny if you should remove the little lumps where the water goes into the head on the other coolent passage ways. I read that as the lump is lower than the rest of the recess it will create an air pocket by each cylinder

[@camaro72_justin9]

That was a cool little mod 😁 👍 🐔💨

[@robbyjay8119]

Good stuff!🤓👍

[@vincescalise4821]

Wow that was a great video, lots of good information, how old is Danny’s Bridgeport mill ? Looks like it’s been around for a while, very well-built

[@FayeHadley]

It has "1985" written on it in black sharpie, but not sure how official that is 🤔😂 it looks older than that to me!

[@TeonCyndi]

i heard of similar mod like that done to the missing coolant passages on the block as well

[@dustyroads204]

Great mod!! Keep it going....... 🐔🐔

[@Adrian_Supra]

Definitely need a timelapse of building the head

[@nathankerr7278]

🤔 I think I'm starting to get a crush

[@bru319]

Toyota doesn't do things without a reason. Leaving the head water passage blocked off in the back was probably done to keep the EGR cooler and consequently the gases entering the intake manifold. If you're using block off plates for the EGR or have a JDM engine set up then it shouldn't make a negative performance difference.

[@ktmfour1007]

Lets do a poll i vote for mid range torgue and power over top end i believe more time spent at max torgue gives the most acceleration where engines usually spend most of their time top end usually doesnt last long and your back climbing out out of the hole too get too top rpms which if your tuned for top end the lower end mid range suffers

[@akmcosdc]

A question that is some what related to the video. On your right fore arm is that a tattoo of a shrunken head? it looks like the way the mouth is sewn shut. Just curious :^) Great video as always. nice to watch before I go to work so thanks to the both of you!

[@FayeHadley]

Haha no, not a shrunken head but has a lot of symbolism in that design. It's really meaningful to me!

[@CEDARHILLPRODUCTIONS]

Hey Faye!!

[@jasmincuk5114]

Zulu mode is good idea for 7m-gte for better cooling system..vut not for 7mge like my....anyway your videos is AWESOME ❤❤

[@FayeHadley]

Thank you!!

[@moisesjpagan]

There is also a blocked off port in the engine block as well. Maybe more cooling? 🤷🏾‍♂️

[@phillippearce9680]

Cool!

[@charlesb4267]

So Faye, in the next episode will Danny be playing with his valuable marbles and accidentally loose a few LOL. On a more serious note, that was some good die grinding you did with the stubby drill bit, I know using carbide burrs on steel trying to clean up a multi drill slotted hole creation it can be really hard to blend it as that burr has a mind of its own, perhaps aluminum and the drill bit tool is easier to work with or it was purely your skilled hands after doing all that porting work.

[@FayeHadley]

Haha I do have some experience with porting, so that definitely contributed. Plus, this is a very low speed grinder, and I stopped frequently to spray with WD40. I cut a lot out but it took me a while - about a good solid 10 minutes almost (I filmed the entire thing, so that's an accurate number!) which in the industry is a crazy amount of time to spend on something so small and non-essential!!!

[@charlesb4267]

@@FayeHadley Wow, you really did go gingerly at that job but I can most definitely understand the slow methodical time spent vs doing a major oh oh where Danny faints from hearing your life ending scream across the shop LOL. If a person was doing a few of those one after another, either a manufactured steel guide clamped on or a CNC mill with program for the whole job so no drill set up would be required. But one offs are just not worth the time for those shops that have the fancy expensive equipment unless the customer really wants to pay for the privilege.

[@JuanOrtiz-mo8be]

Measure twice , cut once . Presicion mi amiga Faye.

[@ktmfour1007]

Are you going too do any intake track and exhust tuning i have some notes from mmi still.. I took the dyno classes as well ..now iam curious and going too dig that stuff up from nearly 20years ago lol

[@FayeHadley]

OMG we will do Dyno stuff at some point!!! We have some crazy stories and weird overlapping experience with dynos..... AND THERE IS AN ENGINE DYNO AT THE SHOP!!!!

[@MS-hd8yq]

Time Lapse For All 🎉

[@johnmbell4642]

It’s times like this great memories are made so when you remember back you won’t think of the virus and the hardship but how we made the best of it without really trying to thanks for sharing I’m having fun so I know you guys are. P.S. I hope this isn’t a stupid question what does zooloo mean?

[@FayeHadley]

You are so right about that!! Thank you for the positivity during these trying times!!!! ZooLoo is the forum name of the person who was the first to bring this mod "mainstream" back in the early 2000s so the mod got named after his username!

[@johnmbell4642]

Faye Hadley thanks Faye I thought it might’ve been something like that as I didn’t think it was directly related to the engine or head designations stay safe

[@Angelhernandez-vl4fe]

Quake mod next?

[@1995dresser]

Love the smell of Dykem steel bluing

[@FayeHadley]

Me too!!

[@hifiman4562]

I could see a new product: Faye Hadley Steel Blue Nail Polish.

[@davidsonjordan455]

Assembly timelapse please.... saying hey from Barbados

[@FayeHadley]

Oh wow!!! Hello way over there!! How are you holding up?!

[@justforkiks29]

Are you planning on doing the crispics mod to your supra also?

[@FayeHadley]

I performed that mod 7 years ago :) I didn't know it had that name though!! Thanks for that👍🏻

[@taylormarcellin]

Port and polish as well? Hahahaha anything for gains, right!?

[@asherdie]

How does this effect the coolant flow path? What reason did Toyota engineering design it as such? Does this increase flow and thereby reduce amount of time for coolant to absorb heat from head?

[@FayeHadley]

I'm actually not 100% sure and I have only read other people's accounts on forums. I have temp data from prior and I'll take data after and report back!

[@smallweights]

Check-in out fayes bicep when she's milling the water port LOL ,😂😹🤣😹🔥🔥🔥🔥🔥🔥🔥💪💪💪💪💪

[@FayeHadley]

😂😂😂😂😂

[@NewJerseyTom]

Definitely a Toyota technician Master with muscles♡♡♡♡

[@MultiDesignGuy]

So Faye how did the zulu mod turn out?

[@1977jelliott]

An end mill would have been better than a drill bit 👍

[@elainesoliz2205]

you are correct, but what we are doing with this series is trying to show methods that can be accomplished in a home shop.

[@1977jelliott]

Yah but Danny is using a Bridgeport so it is probably better practice to use an end mill and then say, "this can be done at home with a drill and a die grinder"

[@lisaromines20]

Shah of course we want time lapse...

[@FayeHadley]

😂😂😂 thank you, Lisa!!!! Well, I never know what's boring or interesting to some folks!!! Thank you for the feedback!!!

[@tombrown879]

Are you gu thg s going to index the spark plugs?

[@wells2671]

Looking for updates on the build and how all of these modifications helped. Is the car up and running with this engine already? If so, arr there any modifications that you regret doing?

[@FayeHadley]

Almost done with it!! I have so little "spare time" that I have taken forever on this build. But it will be running very soon!

[@wells2671]

@FayeHadley That's great to hear, I have 2 7MGTE projects in the works. I was wondering if you had also consider the QUAKE mod for the head? It uses ARP inserts to prevents the head from failing where the studs go.

[@jeremyanthony9300]

Faye , you look like Lettey from the fast and the furious aka Michelle Rodriguez .

[@FayeHadley]

Thank you, I love her!!!

[@jeremyanthony9300]

@@FayeHadley so do I.

[@zREDDINGTONz]

Is that a Ford flathead block on the stand in the background?

[@elainesoliz2205]

OdinTheFurious Yes!

[@Andrew-jh5uv]

Hi Faye Im about to rebuild my 7MGE and yes the zoo loo mod is in my sights how'd you find it? Worth it , made it worse? Thanks Andrew Australia

[@FayeHadley]

Haven't run the engine yet, so not sure! If start out by just drilling maybe 3 holes rather than cutting it wide open like I did here... No one else has done it like this yet, so this is still an experiment!! Many folks have drilled just one to three holes though with great results! 👍🏻

[@Andrew-jh5uv]

@@FayeHadley wow Legend Faye for getting back so quick!! Oh my god there is so much conflicting info on this mod, your bravery is appreciated :). I agree I think I will go with maybe 2 to 3 5mm holes. After many delays I finally got my "new" head delivered (came from Kentucky USA) this is making me a little more cautious on modifying it now. Ill let you know when mechanic assesses the head (hopefully its not annealed) an awesome video series b.t.w. Cheers Andrew

[@petemiller6051]

I assume you used a stone to remove the burrs. I would.

[@user-zo5tn7zb8m]

How to golf mk2 Ajust gear shift linkage

[@user-zo5tn7zb8m]

How to vw golf shift linkage demo installation

[@charles_wipman]

You make a good team; if you like the soul (with the energy and attitude of punk...) maybe you'll like to check out 'Tina Turner - Soul To Soul 1971 (Live)' but, if you preffer the Afro-Funk... maybe you'll like to check out 'Les Amazones de Guinee - Samba' and see for yourself what seven female cops can do when you give 'em instruments instead guns and batons in 1983. See you the friday night!

[@ajaxxmaxx7296]

I thinking after you went with that drill bit also after file it down more

[@FayeHadley]

I actually only used the drill bit!! This isn't my shop, so I dont touch tools that arent given to me! I did think there would be another step - like perhaps a fiber grit to sand the inside, but Danny thought it was good the way it was.👍🏻

[@ajaxxmaxx7296]

@@FayeHadley yeah maybe it's good enough if he says so 😂

[@oddlybtw]

Hit us with the time lapse!

[@FayeHadley]

Sounds good! I'll film it tomorrow 👍🏻

[@allan80supra]

Never seen any proof (someone actually putting thermocouples on the head) showing this does anything positive, if anything I think it would allow more coolant to bypass the head via the return to the pump, note CO-2 in the TSRM. A bypass style heater valve without the bypass back to the pump maybe beneficial. Most of the 7M's issues are due to wrong coolant, poor tune (boosted stock ecu) and old age.

[@tenkillcombo]

Those are transfer punches not center punches

[@mattneely6721]

Is that the baby CHICKEN ?!?!?!

[@FayeHadley]

Haha no.... She is almost a year (in her early 20s in chicken years!!) but she has the broody curse and is impossible to get off the nest right now!!!! She is obsessed with her non-fertile eggs!!!😂

[@mattneely6721]

She's tryin to be a good mom. Kinda rare lol

[@FayeHadley]

Hahahaha so true!!! She tries SOOO hard!!!