Jump to content
SAU Community

Recommended Posts

Hey guys,

Still tearing down this RB25DET I picked up this week. My next challenge: removing the crank pulley. There's no flywheel on the motor so I can't really shove anything thru the ring gear to hold the crank in place.

So my questions.....

a) what's the thread diameter of the studs that mount the flywheel to the crank? in case I need to frankenstein something up to keep it steady.

b) Am I missing anything with removing that 27mm bolt, other than giving it a good smack with a hammer to crack the seal then just undoing it with the help of a breaker bar etc?

c) Anybody have an ingenious way of securing the other end of the crank, other than by my Frankenstein method above (metal bar with a few holes drilled in to secure it against the crank, then lock it against engine stand)

Thanks guys.

Link to comment
https://www.sau.com.au/forums/topic/319657-removing-crank-pulley-bolt-27mm/
Share on other sites

be careful man or you could damage the seal behind the crank.

put the flywheel on then use the bolts where the clutch attaches to the flywheel to tie some shit to the engine with

then yea breaker bar..

There's the problem tho - I don't have a flywheel, at all.

Thanks for the warning about the crank seal.

*Might* get access to one of those - would it be enough by itself to just crack the bolt straight off? I.e. does an air-powered tool deliver enough force to just break the bolt without needing to secure the other end etc?

yep...did it twice yesterday with RB26 engines...they were 350ft/lb tensioned. I do have a good rattle gun though but most reasonable quality ones should be enough for a 25.

The engine should provide enough resistance for the impact of the gun to loosen the bolt.

Thanks, THAT'S what I was trying to say :-)

OK, well the missus' old man has an air compressor, so I guess I need to hit up Kennard's for a rattle gun.... I wonder if they hire them out?

Thanks for the advice guys.

If no rattle gun, take the sump off and use rag covered spanner or such to wedge between the crank and block. (use a counterweight)

Great idea - I have a Bag O' Rags and a big-ass spanner. I'll try that before going for a rattle gun - I'll set the wrench up and smack it with my breaker bar.

If no rattle gun, take the sump off and use rag covered spanner or such to wedge between the crank and block. (use a counterweight)

ahh yes...before i had a rattler i used the wooden handle of an engineers hammer to wedge the counterweight.

yeah wood is the go try not to use anything thats hardened just in case it slips and centre punches something useful :P

the handle of the hammer i mentioned looks like a crocodile has been munching on it...lol

the handle of the hammer i mentioned looks like a crocodile has been munching on it...lol

I got the bastard off.

I wedged a piece of wood between the girdle and one of the rod caps at the point where the rod has minimum clearance from the girdle. Then with the timing belt still in place, I was able to undo the intake cam gear bolt and then the crank bolt with surprisingly little force... they didn't just come right off, but instead of the epic battle I was prepared for, I just had to use a measured amount of force with the breaker bar until they came free. Then used a pulley puller to get the harmonic balancer off, and that was that. It's amazing how easy it can be with the right tools (and good advice!). Thanks guys.

Head came off tonight, tomorrow I break apart the bottom end and see what the bearings look like.... :blush:

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Did this end up working? Did you take some pictures?
    • And finally, the front lower mount. It was doubly weird. Firstly, the lower mount is held in with a bracket that has 3 bolts (it also acts as the steering lock stop), and then a nut on the shock lower mount itself. So, remove the 3x 14mm head bolts , then the 17mm nut that holds the shock in. From there, you can't actually remove the shock from the lower mount bolt (took me a while to work that out....) Sadly I don't have a pic of the other side, but the swaybar mounts to the same bolt that holds the shock in. You need to push that swaybar mount/bolt back so the shock can be pulled out past the lower control arm.  In this pic you can see the bolt partly pushed back, but it had to go further than that to release the shock. Once the shock is out, putting the new one in is "reverse of disassembly". Put the top of the shock through at least one hole and put a nut on loosely to hold it in place. Put the lower end in place and push the swaybar mount / shock bolt back in place, then loosely attach the other 2 top nuts. Bolt the bracket back in place with the 14mm head bolts and finally put the nut onto the lower bolt. Done....you have new suspension on your v37!
    • And now to the front.  No pics of the 3 nuts holding the front struts on, they are easy to spot. Undo 2 and leave the closest one on loosely. Underneath we have to deal with the wiring again, but this time its worse because the plug is behind the guard liner. You'll have to decide how much of the guard liner to remove, I undid the lower liner's top, inside and lower clips, but didn't pull it full off the guard. Same issue undoing the plug as at the rear, you need to firmly push the release clip from below while equally firmly gripping the plug body and pulling it out of  the socket. I used my fancy electrical disconnect pliers to get in there There is also one clip for the wiring, unlike at the rear I could not get behind it so just had to lever it up and out.....not in great condition to re-use in future.
    • Onto the rear lower shock mount. It's worth starting with a decent degrease to remove 10+ years of road grime, and perhaps also spray a penetrating oil on the shock lower nut. Don't forget to include the shock wiring and plug in the clean.... Deal with the wiring first; you need to release 2 clips where the wiring goes into the bracket (use long nose pliers behind the bracket to compress the clip so you can reuse it), and the rubber mount slides out, then release the plug.  I found it very hard to unplug, from underneath you can compress the tab with a screwdriver or similar, and gently but firmly pull the plug out of the socket (regular pliers may help but don't put too much pressure on the plastic. The lower mount is straightforward, 17mm nut and you can pull the shock out. As I wasn't putting a standard shock back in, I gave the car side wiring socket a generous gob of dialectric grease to keep crap out in the future. Putting the new shock in is straightforward, feed it into at least 1 of the bolt holes at the top and reach around to put a nut on it to hold it up. Then put on the other 2 top nuts loosely and put the shock onto the lower mounting bolt (you may need to lift the hub a little if the new shock is shorter). Tighten the lower nut and 3 upper nuts and you are done. In my case the BC Racing shocks came assembled for the fronts, but the rears needed to re-use the factory strut tops. For that you need spring compressors to take the pressure off the top nut (they are compressed enough when the spring can move between the top and bottom spring seats. Then a 17mm ring spanner to undo the nut while using an 8mm open spanner to stop the shaft turning (or, if you are really lucky you might get it off with a rattle gun).
    • You will now be able to lift the parcel shelf trim enough to get to the shock cover bolts; if you need to full remove the parcel shelf trim for some reason you also remove the escutcheons around the rear seat release and you will have to unplug the high stop light wiring from the boot. Next up is removal of the bracket; 6 nuts and a bolt Good news, you've finally got to the strut top! Remove the dust cover and the 3 shock mount nuts (perhaps leave 1 on lightly for now....) Same on the other side, but easier now you've done it all before
×
×
  • Create New...