The_Mantis

Thanks mate, had a look on Z1 motorsports and looks like the kit will fit as it says for DE's only and has plenty of reviews so that fills me with confidence. Also its fair priced so happy to give it a go, cheers for your help.

Hello Z Owners, I am Currently in need of a clutch kit as the thrus bearing sounds like its about to explode. While I've got the gearbox out I may as well replace the friction plate and pressure plate so have been looking into clutch kits. While doing some research I found that I need a 240mm friction plate as my car is an 05 DE. Using a parts site called RockAuto I can only find one kit that contains the correct size (all others are 250mm for HR flywheels etc). However this kit contains a coil sprung type pressure plate rather than the more common diaphragm type and I have no idea if this will work? Has anyone used this item or has any experience or advice as my head hurts with confusion at this point. Please see link for reference: https://www.rockauto.com/en/moreinfo.php?pk=4698246&cc=1431964&pt=1993&jsn=15 Looking at clutch kits in the UK and some advertise to fit DE's but are also 250mm? have I been barking up the wrong tree or can a 250mm fit my car also? I have found this kit which looks promising but is more expensive than ones from RockAuto as a backup. has anyone got experience with this kit from Torqen? https://www.torqen.uk/nissan/350z/powertrain/clutch-flywheel-packs/263344-350z-z33-g35-z1-motorsports-mild-performance-clutch-kit.html Thanks in advance

ZMANALEX... thanks mates I really appreciate that I'll message you privately now and we can sort it out from there. Keith D... agreed ahah

The warping is worse than the photo shows, I followed the correct procedure and torque the first time I replaced these. Second time by the looks they may have been overtightened and not allowing for expansion possibly? I'll give it one last go I think following the procedure to a T, and using sealant all the way around the mating face on the head. I can't see any damage to the spark plug tubes so I'll try using sealant for those as well. If it fail again soon which is likely in all honestly I'll bite the bullet and get the ally covers. Thanks for your help and input mate 👍

Correct yeah, might have to bite the bullet and buy the aluminium ones at this point as I'm on my second pair. Third if you count the pair the car came with when I bought it. I should point out that the external leaks have appeared on both LHS and RHS covers and in different places (one at the side and another at the rear). So I know there is no damage or warping of the heads, no need to have them skimmed etc. I just want to know if anyone has had similar issues with regular failures of seals and what have people done to prevent the oil leaks without replacement parts.

Sorry, you're right the warp is the mating face of the cover that seals against the head. In-between the bolt holes have arched up and in general the rear of the cover have bowed upwards too. I am at work right now so will have to upload a photo later around 5pm. And the O-ring seals within the cover are failing often, allowing oil to seep through to drown the spark plugs in oil. Sorry not sure what you mean by apertures.

The expensive ones were OE spec. Which has warped beyond belief, and flooded the spark plugs. The cheap ebay specials held up better surprisingly but still leak into spark plug tubes after a few months and not many miles. I don't track day the car as I fear it might detonate, and I installed a catch tank with hoses connecting to the cam covers to relieve pressure. First time I replaced the covers I only used the gasket sealant in the corners and front radius as recommended online, but second time I applied gasket sealant to the whole head with a larger bead in the corners. I even used sealant on the spark plug tubes which didn't help. It's almost as if the car is running hot to warp the plastic but temp gauge is good, and no running issues. Engine is healthy and survived the dyno making 266bhp after 100k miles (DE engine). Exhaust looks black like car is running rich which should if anything help with cooling. Its recently had a coolant change etc. I assume the aluminium covers will help, there is a pair on ebay for £130 new. or £399 from tarmac. It's just a lot more money on items I've already purchased twice of varying costs, so would much prefer on repairing/reinforcing the part used ones I have now if anyone has any advice or has had similar problems to me?

Hi all newbie here👋 Had a 350z for 4 year now and been through 2 new sets of rocker covers. Cheap Ebay specials at first, started leaking towards the rear of engine and into spark plug tubes. Expensive Tarmac sportz ones were the exact same. Both sides have leaked at one point or another. New seals included in the covers and correct gasket material/seal has been used. There is not damage to the head that I can see after cleaning off the old sealant. Problem looks like the cover warping as they are not flat at all once removed. Can anyone help or have a solution? Or what's peoples opinions on the aluminium covers?