100k service done! possible secrects within the engine

Hey everyone well i finshed it yes finallyits done i have completed the 100k (thanks Caz! )service on my NA With a GFB lightened crank pulley and Pex overdrive pulley plus some new NGK and some new silcone vaccum lines. I started on thursday but was set back due to needing to be at work on sat n sun but tonight at 7pm it was finally over with. The service itself was not very hard the only thing difficult was the timing belt.. A big thankyou to Ron (Wizard) who came down to give me some advice on getting the timing belt on and answered my numerous phonecalls.. He also showed me some great tricks for getting the engine on TDC and all the advice was gladly appreciated Thanks Ron!!

Soo the engine was all back together and topped up with coolant and ready to go but ohhh nooo.. As soon as i start it the engine stalls i try several more times but nothing.. So i give it a bit of revs and she kicks into life and the problem hasnt happened since.. I think it was the belts were to tight and made it hard for the engine to crank over.. but they seem to have loosened off now so the problem is gone..

Secrets within my beloved na were also found today.. the welsh plugs seemed brand spanking new and soo did the the water pump and the housing for it on the block.. Also the compression for the NA in the service manual is standard from the factory 184 roughly psi i was expecting around 150 even less but NOOO!

Compression: in PSI

Cylinder 1: 210
Cylinder 2: 200
Cylinder 3: 240
Cylinder 4: 200
Cylinder 5: 210
Cylinder 5: 200

Im seriously starting to think my engine has had a rebuild as stock from the factory is 184 and most NA's now aftter 17 or so years are running well below that mark what does everyone think?

Anyway once again a big shout out to Ron, Caz and my mates Chris (Chr1s) and Nathen (Dyken) for everything to make My Zed even better

Heres some pics of the service plus the install of my mates coil overs we did on the same day on his r33 skyline.. time for me to sleep i go back to school tomoro


Cheers James


Shot with Canon PowerShot A95 at 2007-07-16


Shot with Canon PowerShot A95 at 2007-07-16

[img=http://img258.imageshack.us/img258/5445/james100kservice021ye9.jpg]
Shot with Canon PowerShot A95 at 2007-07-16


Shot with Canon PowerShot A95 at 2007-07-16

Shot with Canon PowerShot A95 at 2007-07-16


Shot with Canon PowerShot A95 at 2007-07-16


Shot with Canon PowerShot A95 at 2007-07-16

Shot with Canon PowerShot A95 at 2007-07-16


Shot with Canon PowerShot A95 at 2007-07-16


Shot with Canon PowerShot A95 at 2007-07-16

 

cant see any pix for your links,just put them in the post

 

dude...

congrats on the 100K service....

but I would check those comp figures again.... they are just far too high..... Even a rebuilt engine should not have figures that high..... maybe the gauge you used is misreading?

Cheers

 

those compression readings are high, but a 30psi difference between the cylinders isn't good is it? maybe re-check using a different guage..
are you planning on rebuilding in the future anyway?

I've always wanted to do work on the zed myself. did you start with basic stuff and then build up the confidence to taclke the 100k service? because i would never trust myself... i'm too scared that I'd end up crunching valves and i'd probably hurt myself along the way.

 

picks are up now sorry bout that.. as far as the compression reading goes my mate had a full rebuild on his KA24 with high compression pistons and he got 250 across the board.. with that gauge i will get my hands on another just to be sure

cheers james

 

Did you change the fuel filter and fuel lines? Maybe first stall was just the lines filling up???

Also, pumping the accelerator doesn't help start fuel injected engines Unless you meant you pumped it after you got it kicking over.

 

no i didnt change the filter and lines.. next weel lol.. i pumped the accelerator just after kickin it over and it held the revs and was fine after that well see if it happens this morning

cheers James

 

If your keen, you need to find a friend who is into doing their own work and helping them do some work on their car. That way you get some guidance and any stuff ups are on someone elses car:biggrin:

 

ok..

fair enough dude... I dont know enough about high compression pistons and engine design to really comment... I just would have thought that high comp figures would cause some serious problems (detonation etc etc).... I would have thought that if someone had rebuilt your engine with comp figures that high, that the fuel system would also have to be changed to accomodate the changes... but like I said, I dont really know...

at the end of the day, if it all works, so be it... Although, with figures like that, you should be pumping out some serious dyno figures even with minor mods, and make my 150rwkw look pretty shit... not even the 350z has compression figures like that...

Cheers

 

Carbon buildup on pistons can raise compression, although I wouldn't think by that much. Outright figures aside, piston 3 does seem to be unusually high compared to the others. Probably worth re-testing compression with another gauge, even if only for your own peace of mind.

 

Probably be looking at getting a calibrated(certified) compression test gauge and doing it again

 

as far as previous experience with engines all i have done on my car previously was a couple of oil changes and a apexi pod..i just went by the tech guide and it all turned out alright.. though i do study automotive mechanics at tafe as one of my subjects through school but i dont really count that.. speaking of which i have tafe now.. gota run lol

Cheers James

 

no stall what so ever and the engine is perfect

cheers James

 

did you have any problems with the intake cams springing round? This is the major thing that worries me about doing it myself.

 

Congrats Mate,

Good to hear you got through it wihtout any hiccups ... Makes me want to do my 100k service myself now good stuff

Luke.

 

They normally spin round about 1/4 turn. You just have to use the old belt and turn them round to line up with the little dots. Not too hard.

 

so if i slip and they "violently spin round" as i have read elsewhere, will i cause any damage? How hard are they to shift?

 

They spun on my car when I did the service. I heard a "clink" and nearly shat myself, but several thousand Km later the engine still runs well. I wouldn't say the springing of the cams as "violent" enough to bend a valve if that's what you're worrying about.
As for returning them to their proper positions, I was able to do that by hand.

Like most people, I was pretty apprehensive about tackling the 100k service by myself, but I took my time, bought the proper tools (a torque wrench is essential) and triple checked everything while bolting it back together. End result: minimal wallet damage and a whole lot of experience and knowledge gained. :zlove:

 

phew. I feel a little more confident now. I purchased all the tools needed first. Got my kincrome torque wrench yesterday, and other various things in the mail. So once my bank gets their act together and i can change my pay anyone limit, i can get the parts i need and get started. Luckily i still have my old pintara to get me to work in case it takes longer than expected to finish.

 

They do shift pretty hard but I don't think you could do any damage, it happens thousands of times a minute while the engine is running.