Z20LET Vs Z20LEH THE COMPLETE GUIDE! Astra Opc & Vxr Engines

Sorry i had to reupload due to a copyright claim on the music.
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A lot of people wanted to know the difference between these two engines when deciding what engine is the correct one for there setup so I decided to make this guide, hopefully it helps many of you out!
GET OUT AND BUILD SOMETHING!!

[@AaronUnknownPerformance]

So i hope everyone enjoys this one. If you do give it a share! Use this pinned post if you can think of anymore differences. Another one i just remembered is the zleh has a shorter dipstick for more oil capacity.

[@MikadoRC]

I would like to add that the LET and LEH conrods are actually different, the LET one has a little oil squirter hole drilled all the way into the bearing which the LEH doenst have because it has proper oil squirters. Also the camshaft sensor plugs are different

[@mckillr2668]

Quality content as always!

[@adilkader6329]

Have you got z20leh engine?

[@Alexander_l322]

MikadoRC I like a proper squirter

[@Manlikewezzo]

Iv put a z20 let turbo on an leh do I need any tweaks for it? Thanks in advance lads

[@Zaynite]

Pretty sure this bloke has wrote the Haynes manuals for Vauxhalls. Learnt more from this video than i ever did at college !

[@silverback7279]

Totally flabbergasted by Aarons knowledge. Total respect to this geezer.

[@Alexander_l322]

Ben Lee well you expect the nuts and bolts on a used car to be dirty and rusty or you’ve never worked on a car before so you will have trouble anyways.

[@kylemills3356]

Absolute belter

[@kidger3703]

This lad is unreal with his knowledge!

[@georgespiers3404]

Im glad you uploaded it again fella i only got half way through yesterday keep up the good work and good consistency mate love your videos 👍🏻👍🏻👍🏻👍🏻👍🏻

[@TsGGamingClan]

Please don’t stop making videos mate your knowledge is amazing!👍🏼

[@liamhughes4619]

Love these vids man! Just pure knowledge being thrown my way for 30 mins straight hahah!

[@dean5699]

I'm fairly new to the channel (and I'm slowly working my way through all the videos), but I'm really enjoying Aaron's work! I'm gradually converting the rest of the lads in the workshop, and getting them to follow the channel (it's quite amusing to see technicians and engineers in a workshop full of expensive/exotic stuff, huddled around a computer screen, getting excited about a LET or a smokey old CVH!). It's nice to see someone on KZbin who actually knows what he's talking about, because let's face it, there's a lot of guys on here who have fancy workshops and snazzy video editing, and it's a case of "all the gear, no idea... " (I wouldn't trust half of them to sweep the garage floor!). When you hear Aaron discussing A/R ratios on turbochargers and surface coatings on engine components, you just instantly know in the back of your mind, that he knows what he's doing! He's a good inspiration for the younger and newer guys, who are interested in getting involved with engine work - it just goes to show that even with a simple set of axle stands and a home garage, you can still do a really good job if you take your time, do your research, pay attention to detail and approach the task with the right mindset. I/We are assuming that Aaron is a "master tech mechanic" or "engineer" of some variety? Keep up the good work fella, we're really enjoying it! Deano 🤓 Aston Martin Test Driver and Major Rectification Technician

[@vxmac350]

I definitely didn't understand all of that but still loved it. Keep em coming mate 👍👍

[@otacon4065]

loved this bro! keep up the longer length vids I'll happily watch anything you do!

[@shaunwest3612]

Great video Aaron, amazing work that you do, very interesting and informative, don't think their is any other channel that comes close to your knowledge of an engine 👌😀👍

[@a_gsi_nut8894]

Excellent video Aaron so glad you managed to get this back up definitely saving this one to the playlist

[@laszlomolnar8956]

Bloody beautiful mate , thank you so much for going to the time to make such a informative video , I am rebuilding my z20let is Australia now with a garret g30 setup and we will be taking your advice in regards to billet main caps and balancer shaft delete kit , love the small important details of lifter manufacturing by INA , your a legend mate . Thank you

[@53gsiturbo20]

Cracking video once again,really really love these long in-depth videos of yours, so packed with info will have to watch this one twice 😄 if you ever open your own garage offering rebuilds for these engines all the other garages that do the same would go out of business 😂 can't wait to see next upload 🙏🙌👍

[@avinashbhogun]

Bonus footage; expect the unexpected. Great content, as always.

[@br4d101]

Been watching your videos for a while now, the quality and knowledge is always on point! Great information to no, not into Vauxhall’s or evos but still watch haha keep em up 👍🏻

[@richardgrubbe1013]

Another banger mate really need someone like you to look at my car

[@mikeystewart8854]

Great Content 👌 always time well spent watching these

[@kinton56]

What a mega video! I’m a Vag guy and watching your videos makes me want a Astra GSI Big time! Thanks for your videos Aaron always look forward to watching them.

[@callumbuckingham7831]

Best vid I have seen in a long while 👍

[@Icestorm294]

You know when someone knows a lot about a subject, they don’t take a breath during the explanation - it’s funny, but its true. So much knowledge bursting out. I’d love a build by Aaron.

[@vauxaholic]

Great video mate, the part wear you move the pistons with one hand made me smile you reminded me of an old DJ scratching on the decks 😃

[@richardstanislaus3671]

Mr Google of engines, big up the GSI crew. Love ur vids

[@scott2495]

Love his knowledge on cars and advice!

[@cre8tivegarage157]

We Enjoy watching your channel 👌 Great vibes , We definitely support big time 🥂😎

[@danielferraro59]

your amazing Arron. i’m a porsche man but love this channel and had my fair share of vauxhall’s myself. your knowledge is excellent second to none mate 👌🏼👌🏼👌🏼👍🏻👍🏻👍🏻

[@BeardedHam]

I don’t own a vauxhall,but I’ve watched you videos for years now, your knowledge is unreal! If my Alfa JTD engine ever goes boom, you might be the guy I’d be ringing, as GM shared a lot of parts with Alfa Romeo at the time.

[@redpillrevelation5978]

Love watching your videos man you should do a complete series on rebuilding this engine and complete install step by step would be great to watch

[@dtech9670]

Great Video ! Thanx Aaron. Greetings from Germany !

[@stevenwillerton3949]

Great video mate unreal knowledge on these cars and engines always watch your videos for advice and what to do, think you should do more off the show on the parts you replace and what you do to them for a more in-depth look on what you do to your cars

[@mikeyoakes180]

Wow that was more In depth than I was expecting 😂 great video tho....👍🏽

[@liamhonnor879]

First video of yours I've seen mate but finally I've found a guy that actually knows what's he's talking about 👌

[@justinfieberg1448]

A man that knows his stuff very methodical very disciplined!!

[@joeyturb0]

Great insight as always man 👌

[@ianloveridge6735]

Another bang on vid bud, why are you not working for a race team or building engines for Courtney, your knowledge on these motors is priceless, fair play to ya. Love watching

[@Thonglover37]

I just bought this engine ! love it

[@ianhammond1722]

Aaron.. again ... your knowledge is amazing. You could read us the telephone directory and I'd listen! Please do a question and answer vid so you can explain where you learnt all this!

[@rhysbrennan-killick5385]

These videos are brilliant.

[@broken12367]

Glad it’s back on👍

[@scottsvxr]

Yeah thought I was tripping for a minute 🤣

[@broken12367]

scottsvxr Yeah I saw it yesterday and thought I’ll watch it later then it was gone 😭

[@scottsvxr]

@@broken12367 me too😅

[@lukecowell7516]

@@broken12367 me too sat in the kitchen cup of tea and a smoke at midnight all ready to watch.

[@badboi162]

scottsvxr u me both

[@andisadler2897]

Aaron is the man for all Z20.

[@garryosullivan5919]

Great video alot of helpful info 👍

[@Sjwatts]

Excellent vid cheers

[@x8dudtrackdaytoy]

Great video fella

[@marksmith1560]

Ordered a t shirt. Don’t usually off KZbin but you do good work 😉

[@Dynamic3DLtd]

amazing video

[@bobthesnobscotland2821]

Good video great work thanks

[@captmarvel7334]

Would love you to give mine a health check,unbelievable knowledge.loving the content.👍

[@jeffhubbard5660]

The T shirts are very decent quality. Thanks for rapid service....

[@Tombrosapien]

I don’t even drive a Vauxhall but watched it anyway 🤣 this guy is a wizard

[@Triumph_Through_Trauma]

mate you need to get that subframe sorted and make a video , i have a full front subframe & rear axel , polly bushed and powdercoated ready to fit on my GSI and need some guidance lol , i have a haynes manual but might as well be in Egyptian . great stuff great videos for us guys that want to learn - also the vxr brake upgrade is that a straight swap and does it make it heavy on the front end steering wise

[@DKBSOB]

Hi Aaron, Great videos, your knowledge is really refreshing to have someone who actually knows about what they are talking about! I have a question on the oil cooler. How does the thermostat work. With the water-oil cooler, would the thermostat not be open straight from cold to allow the oil to heat up faster? But if you had an oil-air cooler, you would want the thermostat to stay shut untill high oil temps, so you would need a different stat in the cooler? Regards Dave

[@kadettsr]

Hello Aaron keep up the good work. You got interesting topics. I want to ad an oil temperature gauge to my LET. Maybe you can make a video how to install a oil temperature/pressure gauge on the engines. Greetings Jean-Paul

[@ryanmundy1013]

I have had to sub to you. great knowledge the fact you know your shit. do you have an advice page or anything set up for the car community ? you legend!

[@astonrichardson4309]

Il share this mate

[@derekpearsonpearson4582]

Liked the comment on the Hayes manual

[@lyndonwebber1389]

I don’t even like Vauxhall but ur vids are always interesting 👍

[@mikey4103]

nuva well explained rebuild.....come on give him a LIKE..........

[@n.gperformance291]

Hi Aaron what size restrictor bolt will I use I've got 2half mm and a 4mm !!!! Love your videos keep up the content

[@andrewjones4285]

Great video. Great info also. Did you know that the generic toca engine used in the BTCC is loosely based on the the Vauxhall LEH. I think lol. Could be the LET. Started life as a Vauxhall engine!

[@connorcox1441]

Btcc toca engine uses a z20net as a base as its chain driven.

[@malcolmmay5674]

Nice video man love the content anyone know of videos of these engines in rear wheel drive cars

[@joemarinho4272]

Excelent

[@my_carp_life3424]

I swear my c20let had mahle pistons in it but it was 15years ago when I strip it down, god this brings back memories

[@pweller3960]

Great video! Can you supply everything needed for the balancer delete on the LET or do you have a list of bits I would need to shop around for?

[@jackrussel853]

Perfect timing Aaron, i am going VXR turbo on my LET at the end of the month, i spoke to Courtenay Sport regarding an oil restrictor and apparently the VXR turbos now have oil restriction built in and don't need extra restriction, they said if i fit one then it will damage the turbo mate?

[@ItziiSpiNz]

Hi, what a great video, just would like to know what you think of the Z20NET, they come in the Saab 93, are they good engines for tuning ?

[@magellan3xxx]

Perfect video. Thank you friend. Few question I have.:) 1. So is good or not the K06 hybrid (I can get it same price as K04) turbo or I need to look Garett or any other but I don’t need big Bhp and Nm.? 2. What about stroker kits? Are they good? How they works maybe with K06 hybrid turbo?

[@peternufc1981]

Know your stuff lad

[@MrMazza1998]

Just a quick one - if you or anyone reading this needs any Opel bits, whether it's badges or whole engines, I can help you out by sourcing in Poland and sending safely to the UK. Would love to see you do a Astra H TwinTop opc sometime 😁

[@grantwest7302]

Knowledge is wealth !!! This guys rich lol

[@frankconnolly6716]

Hi Aaron, I’m taking the engine out of my SRi 190 tomorrow. Would appreciate some help/advice when it comes to the rebuild

[@ajzcarz7117]

Such great info. I have a 07 sri turbo. My mate who is a mechanic says its a ler engine, im so confused. Im rebuilding and forging it, safe for 20-25psi of boost?

[@craigwilliams2610]

Hi mate,I'm new to the z20let engine,I've watched a few of your videos,would you recommend victor reinz valve stem seals? I remember you said elring seals were to tight on the stem,help would be great please 😊😊

[@MsTitof]

Hello sir, I watch a lot of your videos and I am very delighted. I'm learning a lot but today I bought an Opel Astra VXR 2 liter turbo, I need help from you to fix a turbo pressure problem and have a diagram to connect the small hoses between my dump valve and intake especially since normally I should have a pressure of 1.2 bar and I only go up to 0.800 I must also check the tightness of my turbo boost circuit. if however seeing how passionate you may be could be of help. I would like to send you photos by exposing my problem on my Astra but on which site could we discuss? thank you for your precious time and your help cordially.

[@janjacobs4195]

Good day just a quick question on the z20let with std internals and arp rod bolts what is the maximum power it could handle ?

[@dudzik2]

Oh, plus please explain if it is a good idea to run the 3.3 bar FPR with the VXR injectors. If it's fine, do you need to map if right away?

[@GavinMufclee]

Arron how hard is it to change wheel bearings mate my back ones have gone on my Corsa Vxr burg? And was wondering if you have a standard or any pre cat lying around thanks bud. Can I ask are you near Manchester way

[@pardonchauke2365]

Thoroughly enjoy your vids bud. Wealth of knowledge 🙌🏾 I'm in a situation where I can buy a complete Z20LET engine for less than I can rebuild my broken Z20LEH. Would I be at a disadvantage? Obviously I'll slap on my VXR turbo and the injectors. Would appreciate the advise

[@corpszur5602]

how did it break, I'm looking to buy a astra with a Z20LEH

[@richardgrubbe1013]

Any ideas as to where I can get a reconditioned m32 gear box for my z20leh zafira many thanks

[@kenwilliams8048]

I would like to know if your running standard rods what rod bolts would you put in for a upgrade?

[@harrygeorge2856]

I was wondering have you ever worked on the b207 engines?? If so what are they good for

[@XxSniperHazzardxX123]

my astra gsi has a massive oil leak and its covering all the pipes in a oil type film, any ideas how to solve that? im going to be changing all gaskets and valve stem seals on the 11th June. i just need to know what would be best way to prevent any more oil leaks.

[@neilcarpenter1301]

I am think swoping my Focus st for vxr what bhp can I run on Changing the exhaust the intercooler and air in take

[@vehicleenthusiast5086]

Thanks for this video Aaron and sharing your knowledge. How did I get in touch with you please.

[@sr71blackbirddr]

Great vid as always Azz, How come you rarely see VXR J's tuned compared to H's or GSI's

[@Vauxaholicx]

Vxr j is a Peugeot lump

[@Khusta...Ngcupe]

Is it possible to fit those on an 1.8 CSE? I have been struggling with my engine, I now have been looking for its Crankshaft all over South Africa. The engine is X18XE120Z45598. Please advise, and if you do have let's work on how I can get it for my car.

[@BOOMBABY2020]

PISTON SLAP SOUNDS LIKE A NIGHT WITH JOHNNY DEPP

[@markcozzie]

Aaron have you watched any "4 cylinder performance" vlog's? ,it popped up on my recommendation feed,wow is all I'm going to say,go watch his engine build vlog,loctite arp studs..workmanship is shocking to say the least..

[@jamiewright1855]

Great videos , not much true information about on the z20 engines , one question i do have is the ler engine the same has the let engine?

[@LetsPlayDoni]

What you think about turbo-ing the 2.2 NA engine? Z22

[@user-rt3wl7qo4q]

@Aaron unknown I was just wondering I have an sri with the lel engine in it. Is it an easy job replacing this engine with the z20leh as in loom needed or would it fire up and drive with thw same loom and switching ecus?? Anyones help would be appreciated

[@nechijohn]

Hi, i'm going to buy an astra mk4 let this weekend, it's still at 200 hp but it has a leh turbo. What can i do to it to be stronger and allow more abuse? I dont want more hp but i want it to be safe to be abused. Many thanks in advance and nice video

[@charlkellermann7183]

So is the block ladder brace standard on Z20LEH or an extra? Thanks

[@keljon32]

I’m fitting a leh turbo to a let and from looking at the turbo it has the oil feed restrictor built in. Not sure if that’s a new thing

[@roblord3973]

Hi Aaron im rob and I'm in need of some help and looks like ur the man to talk to about the z20 engine me and a friend recently got a zafira gsi as non runner no compression on no3 the engine in the car was a z20let would it be possible to fit a z20leh engine in it ???? Hopefully u or someone can give me some advice tha ks rob

[@aaronditchfield781]

Would you be able to convert my 1.8 sri to the let or leh if so how much would you need ?

[@lowflayer]

do i also need restrictor bolt for the z20leh engine?

[@dudzik2]

I love your videos and recantly had to rebuild the engine cause od 3rd piston. It just broke. I've got a k06 hibrid turbo with a 3" exhaust. What could have cause it in this case?

[@oogs9114]

I know this is old comment but the answer is in your question. If you were running a K06 hybrid then I’m assuming you were running 300+ on standard Rods/Pistons. Z20let limit is rated to 280-300 max which means 260/270 is a nice safe spot, when engine is at its maximum limit its only a matter of time before something gives, yes forging is expensive but it may save you money in the long run

[@shanemacleod4011]

Can you please do a ler Vs leh please. I know ler has the let turbo let maf and let injectors. With a leh throttle body. I've noticed the ECU is at the back instead of the side. And I'm not 💯 but I think the ler also has the oil squatters. And same M32 gearbox but alot smaller of a clutch

[@uroskompara4551]

What about z20lel engine. Which one is better for tuning?

[@fifth-scaleproductions8878]

Pretty sure the black piston skirt coating is molybdenum disulfide, meant to reduce friction massively, its not Nikasil .. Nikasil is on aluminium cylinders to give the aluminium surface a hard plating to stop rings ripping them apart. Coming from the 2stroke mx bike world, when Nikasil plating chips off the cylinder walls and the piston ring grabs the bare aluminium they seize as they grip/dig the aluminium.

[@geirhaugen3781]

Nice youtube-channel! Could you please do me a favour and meassure the OD of a LEX flywheel? And where do I get a good deal on a slightly upgraded turbo?