Brad

BRAND NEW timing belt slips, warps some valves. While i am getting heads from a salvage yard thought i would send them somewhere for porting and polishing for my future N20 system. Anyone have this done to there max if so were and how much.

ngthing

how does a slipping timing belt warp some valves?

DanNY

iTrader: (14)

timing belt slips...piston hit valves = bent valves.

Brad

take a wild guess...When the TIMING belt slips it throws of the timing! So when a piston was goin up a valve must have been coming down bending or warping the valves to were they will not seat right...genious

Brad

thank you danny

Matt93SE

iTrader: (44)

now now... be nice.. (and next time, tell him to just read my sig. )

DanNY

iTrader: (14)

it's ok man...he did ask about how to change oil a while back. so i take it his mechanical skill is slim to none.

i try to make it ez for him.

DA-MAX

iTrader: (10)

can I join!?!? --->

"you're too stupid to understand how to fix it so stop asking" club member #1"

Pervis Anathema

iTrader: (8)

Genius... Not genious

Brad

wWhats with the smart *** remarks, i just need someone to answer my question.

gotmilk2000

iTrader: (4)

It costs about 500.00 the gains are (depending on who you talk to)anywhere from 15-50hp and there is a shop here in tulsa, oklahoma that will do it and has a dyno at the shop. If you want i can give you the info. Matt93SE knows where im talking about too. Charles

Nismo87SE

It would be a waste to get headwork done without aftermarket cams. I had headwork done to my maxima and installed cams. Although the motor didn't last long enough I did learn a few things. Headwork+cams = VQ powerband. Your car will pull the same or slightly better below 2500rpm (assuming the headwork was done right) but after 3500rpm you will feel the car pull harder and longer. With just the Isky 262 grind my car pulled just like the 95+ maxima's did. However I had more torque at a lower rpm plus a higher stall torque convertor. I'm quite confident had my VG survived it would have ran mid-high 15s @ 85-87mph. But then again my intake manifold/plenum is different so your results may vary. I suggest getting new valve springs, retainers and lifters if your going to get cams. Then do some research, you obviously have alot to learn.

male

Check This... A port and polishjob on your vg heads will make every other performance upgrade work much better. In most engines, including our VG's ( I have an 89 se 5spd) the major limiting factor is the heads ability to flow. Typical gains of 15-20 hp are likely. Add in cams, increase the fuel press, and reprogrammed ECM, and now you sre on the way to serious gains. All the bolt ons in the world will only get you so far.If the heads can't flow any more air, you have hit the plateau. The object is to raise that plateau. The formula is this..(budget dependant) Port and polish heads, install larger valves, competitionvalve springs with a good cam (choose cam based on driving habits and your needs/ desires. If it is a daily driver, find a cam that is strip/street worthy. Otherwise.. highlift high duration=more power in the upper rpms but idle suffers as does fuel economy, but at 6000 RPM it will rip! Extrude hone intake plenum/manifold, port match to heads. Now you have optimized airflow with the exception of exhaust manifolds. Custom jobber there. There ARE companies that can do all of the above for under 1000 bucks. Dont forget labor to install it all. From there it is all tuning and driving skills. Do some research and examine you bank account. I will post my results from this formula in a few months and let you kn ow what gains I see.

Brad

Hey gotmilk if ya got a number for that place i would appreciate it. Does anyone have JWT cams? They are the first ones i have found.

davis4004

If you had a shop do the work they should be responsible for the damage. Do you know what kind of belt it was?

Brad

Murdocks Nissan changed my water pump so i told them to go ahead and change my timing belt since they were in the same area. I assume it was a Nissan brand belt.

davis4004

If they did the work and you have a warranty they should be fully responsible for the damage. Your tensioner must not have been installed properly and loosenerd up somehow causing the belt to slip. Good luck on getting it all fixed and getting your max back on the road again!

ghostmax

iTrader: (4)

Hmmm, Murdocks Nissan.....no wonder they changed to Dobbs Nissan recently. What part of Memphis are you from?

Brad

Im from Collierville, and yes murdocks did change to dobbs recently but murdocks did my work why did u heaar of any other people they screwed over?

avusblue92se

would heads from a na z fit a vg30 from the maxima? is the design any different? i think that it would be worth looking into because they may have a more efficient design.

ghostmax

iTrader: (4)

No, I haven't heard any bad things about them, but you should have a warranty on it. Have you tried talking to them about it? They did my timing belt on my car right before I bought it from the owner. I had no problem. It's probably a freak accident. I would b*tch them out if that happened to me though. Good luck. Btw, I'm in Cordova.

DA-MAX

iTrader: (10)

ummmmm, N/A Z31 and Maxima have the same engine.....

avusblue92se

yeah i meant z32 heads. the z32 na motor puts out 222hp(z31 na 185). the difference may be in exhaust, ecu, heads? i just thought that they may have a better design and might fit.

DA-MAX

iTrader: (10)

dunno man..I think since the VG30DE engine as a whole is so wide, I'd think the heads would be larger than ours as well!