waxer52

Its totally mangled the bolt. I might try a helicoil on it and if that does not work I will have to rethread bigger and use a custom bolt.

Got a garage to do some work on my rb25/30 and they have managed to destroy the thread in the end of the crank where the pulley is bolted on. What can be done to fix it while the engine is still in the car. Can I redrill and rethread the hole to the next size up from standard. Also I have an rd28 engine here and I'm wondering can I use that if I have to replace the crank. Thanks.

Ok so if it blowing through the rings and up into the cam cover and out through the oil filler hole, then why does my engine run lean with this leak?

I have tried rotating the engine and it has made no difference to the leak, it is still hissing the same. My compression test showed up ok. 10% difference was the most between each cylinder.

Power fc is still on the standard map. i am about to tune it so I have to make it some bit right. My mods are: rb30/25det with vvt holset hx35/40 turbo power fc and datalogit 550cc high flow injectors greddy copy plenum external wastegate avcr boost controller z32 maf It cant be in the tune as it still has the standard map and things only went lean after the plenum install. I cant find a leak where it seals against the head but I have the inlet cam cover off and I can hear strong hissing when pressuring the plenum.

I have a lc-1 wideband and datalogit installed. Will also remove the cams later and see what happens.

ok so if I remove the two cams and leave the plugs in to seal the cylinders, the only place it can leak is at the plenum (if that is where the leak is).

Yes the cams are still in the engine, but I dont understand why it wont hold any pressure in the inlet manifold. The air seems to go in through the manifold and out through the oil filler cap. The reason I am doing this, is that I am leaking air some where and im running lean. I need to find this problem and fix it once and for all.

Well after trying to sort out all my vacume leaks I think I may have found a bad problem. While pressuring the inlet manifold I could hear a leak but it sounded like it was in the head. So I removed the oil filler cap and put it under pressure again only to hear a louder hiss and if you got close enough you could feel the air leaking out. Next job is to do a leak down test. Would anyone have an idea as to whats gone, or has this happened to anyone before. Thanks for looking.

Is it possible to test the litters by removing just the cam covers.

As the title says "Can a sticky hydraulic lifter casue an intermtient misfire?".

I have tested it but i have not changed it with another one. I will try that first to see if it works.

Afm has been cleaned, new plugs tried with different gaps. Pfc with datalogit and wideband and no boost yet. Next step I think is to get a z32 and see what happens.

Im running msd coils in wasted spark mode. Cas has been replaced. Plugs at 0.8. Misfire happens from startup most of the way up the rev range have not taken the revs over 4000rpm as mototr has only been built and not mapped yet.

Fixed it, replaced my pcv system and no more smoke. The only other problem is the misfire I cannot find. Its not consistent it just comes and goes every couple of seconds. Any help with this problem appreciated.