1KZ Compression Test Figures?

[Chriso57 Senior Member Find all posts View Profile Close Chriso57]

Hi all,

I am after the specs for a 1KZ compression test. Anyone got the numbers? I have searched until my eyes were bleeding in 120 and 90 series with no luck so apologies if this has been covered before. Also anyone got any specs for boost pressures?

Mine has traveled 230k+ now so just looking to give her a birthday with new glow plugs, reco injectors, throttle body/intake manifold scrub up and a thorough medical.

Thanks in advance.

Chriso

[fishfinder Advanced Member Find all posts View Profile Close fishfinder]

Re: 1KZ Compression Test Figures?

PM sent

[Chriso57 Senior Member Find all posts View Profile Close Chriso57]

Re: 1KZ Compression Test Figures?

Thanks for that link Fishfinder. That site gave me heaps of info re: clearances etc however no compression pressures were listed. Anyone got anything else they can throw my way?

Chriso

[adrian5800 Advanced Member Find all posts View Profile Close adrian5800]

Re: 1KZ Compression Test Figures?

Here you go Chriso

http://dl.dropbox.com/u/8192818/lancru_lj120_diesel.pdf
http://dl.dropbox.com/u/8192818/m_03_0015.pdf

This should give you all you need, although these are from the 120 service manual they should be relevant to a 90.

Cheers

Ades

[Chriso57 Senior Member Find all posts View Profile Close Chriso57]

Re: 1KZ Compression Test Figures?

Spot on Ades, thanks mate!

Chriso

[fishfinder Advanced Member Find all posts View Profile Close fishfinder]

Re: 1KZ Compression Test Figures?

Thanks for that link Fishfinder. That site gave me heaps of info re: clearances etc however no compression pressures were listed. Anyone got anything else they can throw my way?

Chriso

they use to have more details on them including compression back in the days i opened perth branch up - sorry I did not look at the new ones

[samo Addicted PP Member Find all posts View Profile Close samo]

Re: 1KZ Compression Test Figures?

In Brisbane I would strongly recommend Rocklea Diesel as for parts

sounds like a free plug there ##########. :lol: cheers samo

[adrian5800 Advanced Member Find all posts View Profile Close adrian5800]

Re: 1KZ Compression Test Figures?

In Brisbane I would strongly recommend Rocklea Diesel as for parts

sounds like a free plug there ##########. :lol: cheers samo

Sounds like there's some sort of association there hey Samo?

[Ivanprado90 Junior Member Find all posts View Profile Close Ivanprado90]

Just posting these figures for all members, from the Toyota Manual :
Compression test at 250rpm.
90 - 120 series 1KZ-TE : Standard 3040 kPa, Minimum 1961 kPa, Max. variation between cylinders 490 kPa.
120 - 150 series 1KD-FTV : Standard 2700 kPa, Minimum 2200 kPa, Max. variation between cylinders 500 kPa.
1KZ-TE Glow plugs : HKT No. CP-22 Ref No. 19850-67020/030. Set of 4 $110.00 trade. Made in Japan. Torque 13-15 Nm.
1KZ-TE Injectors Set of 4 exchange $350-$480.00 depending on type of head. Torque 54Nm. I would also recommend cleaning your secondary filter in your fuel pump. Make sure you bleed your fuel system after the work has been done (Injectors/glow plugs).
In Brisbane I would strongly recommend Rocklea Diesel as for parts above. Most Aust. plated vehicles from 2000 are $350.00 a set. Don't forget to take out your old injectors before you go, exchange.
Sorry about the delay as I had to get the figures out of the books at work. Hope this helps.

Hi prado fellas, i have done a compression test on my 1kz, and all 4 cylinders gave 3,000 and bit more Kpa's in the test. i want to know if this is an "ok" number. My problem is when the engine is cold in the morning, it is hard to start. i have taken it to many mechanics some have said the engine is loosing compression, others say the engine is loosing abit of compression but not "so much" to make the engine so hard to start when cold. but i have not seen any sign of cracked head or engine knocks so far. no coolant consume, no oil consume, no high fuel consume, no weird engine noise, we have checked the glow plugs, the fuel pump, i do have noticed abit of power loss though. the only sigh it is giving me is the cold start startup and i know this is a common symptom of low compression, but then why did i get 3,000kpa on the test. should i discart the compression? what do you guys suggest me


also If i try to start it with 2 batteries with high Amp on series (connected) its starts right on

If i open the engine oil cap while the engine is on, you can see some white air coming out, the mechanics say it is compression. but "not so much"...

[mjrandom Out of control poster! Find all posts View Profile Close mjrandom]

Ivan most likely glow plugs.

[mackayvx Advanced Member Find all posts View Profile Close mackayvx]

Sounds like the way my starter motor started playing up.
I did a write up in black vx's thread about hard starting..

[t303 Senior Member Find all posts View Profile Close t303]

If the plugs are more than 100k km old I would change them as they are due anyway and see if that improved it. The starters are usually pretty bulletproof, the first thing that usually goes intermittent is the contactors. There are tutorials around on how to clean up and/or change them. Total km's on the engine would be useful info, but by the look of those pressures I would not be too worried.