N12 Turbo Forums

Nagh, its easy m8, Youll see.
Once the pulleyt is off you only have to jack the motor enough for the cam to clear the top of the guard.

Oracle

... section had completely let go, then the belt would have loosened completely off and there is no way in hell it would have NOT jumped teeth on the cam/crank sprocket and lunched a handful of valves. Does the pulley show signs of rust on the inside? As in, say, sitting in a box somewhere upside ...

Head can stay on!

Been there done that.

Undo the driverside engine mount, the front engine mount and jack the engine up to allow the cam to slide out over the guard. It is far easier with a second set of eyes and hands to make the whole thing work.



Damo

I think you're definitely right there. The timing belt has corresponding marks on it too. Just pulled the rocker cover off, cam lobes feel a bit dry, but no evidence of really bad wear. I think the top end might be ok in the short term if I drive very easy on it. A bit concerned that ...

... might have caused it? The gear didn't appear to have any damage when I fitted it. Also, is there even the slimmest hope that my main/rod bearings, cam lobes, rings, etc. weren't severely damaged by not having an oil pump? Cheers all.

... valve clearances because it may solve the problem. There wasn't much to readjust, everything was just about spot on. But what I noted was that my cam seems to be badly worn on cylinder #4, the exhaust lobe is worn down a quarter of a millimeter where the runner touches the cam, spanning one centimeter ...

... to get an exhaust and drive it under load. What should I expect for vacuum at idle and 3000 - 4000 rpm (no load). It is still running a standard cam and a T25g. Does vacuum increase or drop when free revving? Sorry for the rookie question. Thanks for the quick responses. Cheers, Chris

... replacement motor was only missing the inlet and turbo manifolds so a quick changeover and its ready to go back in. As a precaution, I swapped the cam belt as wifeys was replaced quite recently. Also had to R and R the waterpump inlet nozzle as the one on the motor was badly rusted and the heater ...

... between the two is less than a 1/3 f a tooth for timing sakes only, non consequential. As for setting you tappets, why are you using the cam marks? The better way to do it would be to use the rotor button, or timing marks off the crank. Just remember that at TDC off the crank you have ...

... problem. in this article http://forum.n12turbo.com/viewtopic.php?t=7302 It clearly says line up the arrow to the TDC mark. sound easy. I have 2 cam pulleys both the same, off 2 motors, both have arrows. But the also both have circles in them (180deg). This the article cam pulley does not have. ...

... nigh on impossible to get the ECU to correct all loadpoints without a dyno. This ECU was bought offen a friend and was fitted to a Mitsubishi quad cam V6 and i configged it for the E15 and used his fuel maps, comverted to VE to establish a baseline run map. This is all well and good cept the ECU ...

Actually when grinding your own cam you can have as much overlap as you want. The only limit on it is that the valves will only open 1.5mm during overlap (assuming you ground the cam down .5mm) until the rocker gets back on to the old surface. ...

I think what E is saying regarding overlap is that with the stock cam, you a basically stuck with what Nissan cast into it, there is no way to change/grind different overlap short of a couple of degrees at most. Wow, 9grams between rods is fairly huge for ...

... which galleries and returns I need to either get welded up or piped externally, and am not fussed about trying to convert the cog sprockets to cam sprockets (which I think was the ultimate downfall of the previous 'attempts'). We all crave a simple RB30 fashion bolt on, but that aint gonna ...

... yep complete waste of time + moolah. BUT, all the bits I need to make the sucker go together are sitting in my olds garage. Spare block, spare cam sprockets, a welder, grinder, and fuck-off big hammer, it will be sweet! Besides, I want to know first hand how much of a headfuck it is going to ...