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Hey guys ive got the chance to purchase an astra mk 5 coupe with a z22yh engine and 6 speed m32 - these were sold in Oz but not over in Uk i understand. After driving it - i noticed it lacked the throttle response of my old mark 4 that had the airbox derestricted and a ported throttle body...

ok can one fit better rings or do we have to change pistons too??

Hey vocky just curious do the zy22h pistons have better control rings than z22se or do they become clogged too??

Thanks yeah pics would be great.

Hey just curious whats involved in fitting the electric water pump? Hard to do?? Is it easier to do than balance shaft delete?

Nassa 1. buy genuine spark plugs the spark plug gap is set - u dont have to touch it. 2. The compression on a healthy z22se is between 175-230 psi. 3. You should have replaced the gasket. The z22se is a great engine but its not perfect - if treated properly it will run and run and...

Saying the engine is designed to do 100k before a cam chain swap is a bit of a cop out. In the old days a chain got loose and maybe a bit rattly but it didnt self destruct the engine. Thats the whole point of having a chain and not a toothed rubber belt - so u dont have to worry about such...

Very unfair that u have two astras and im struggling to find one!!!:(:( Can u send pics of the second one??? Unless u live in a warm climate i think u will be hard pressed to do more than 454k on original chain - where i live start up temp for me on a cold morning is about 8 degrees (for about...

Ive been preaching fully synthetic oil irrespective of grade, 5w-30 or 10-40 for this engine for years.........better still POA oils

I think they are great engines with some MINOR design flaws which can lead to fatal consequences in the hands of idiots. i currenty drive an alfa guilietta 1.4T - id kill to have my astra back. You will only really begin to appreciate how good these engines are when u drive something else...

Nice. The gearbox is one of the first things that ill mod to my liking when i get another astra :)

How u doing Berto long time no see congratulations can we have a few pics please?? The coupe never made it down under and sadly astra sri 3 door hatchs with a z22se are as rare as hens teeth in good condition nowdays. Funny u should say that im from Gods country lol - Australia of course :)...

Yeah very few modern engines with direct injection will get that sort of mileage because the heads get dirty too quickly and injectors take off the oil on the cylinder wall so the bores wear quicker than a non DI engine. Sadly my Astra is in heaven - im lookinig for another here is a pic from...

Nice. Ive always liked the smoked head lights on silver paint. Yeah so much fun to drive - mine had a ported throttle body, panel filter and de-restricted intake. Thats all it really needed to give instant throttle response - i loved its ability to plug all the traffic gaps lol

Damn good! Anyone who says otherwise hasnt driven one especially in the lighter Astra. A well looked after z22se will easily hit 300K miles. Many in the usa have done 600k miles +. I did 300k miles on the original chain and it was still tight but i replaced it because one of the plastic...

To be honest id rather have a z22se over a z22yh - they are more reliable - the heads keep cleaner cause they not direct injected and all things being equal will last longer. If u raise the comp ratio u get most most of the power and torque that a z22yh has anyway. Suitably modded the mk4...

You could also skim the head by 1mm to raise the comp ratio to 11 to one. Apparently there is a good torque hike just by doing that alone.

These are very common faults for z22yh and ur mechanic should investigate those first. Suggest you use the search facility on here and see if the symptoms match with the fault codes u have found. Ive heard on various forums the manual box needs a bit more oil than it comes with from the factory.

Hi not sure what import duties apply but u could get some from USA https://www.rockauto.com/en/catalog/chevrolet,2004,cavalier,2.2l+l4,1434209,fuel+&+air Many USA models use the Z22SE engine but its called L61 over there or L850

Vocky is she not road registered anymore?? Seems u enjoy the tinkering more than the driving lol