Jump to content
SAU Community

Recommended Posts

Who cares, buy a new f'ing bolt and move on!!!!!!!!!!!!!! You don't like that one, buy another one.

People are killing off valuable brain cells trying to work out what the issue is here....

  • Like 1

If that bolt doesn't meet your quality standard it is extremely unlikely that another new one will. They make thousands at a time as I'm sure you would know.

If it was me I would use it. If I didn't have it I would get an Unbrako bolt and use that.

  • 8 months later...

Read some posts on here lol, you guys...

So we had an engine that was freshly rebuilt last 500km before it decided to lose it's timing and bend 8 intake valves.

post-12712-0-27596700-1430651828_thumb.jpg

The cause was narrowed down to the brand new idler bearing bolt that was fitted to the fresh engine.

It ended up snapping clean off at the threaded portion. This caused the idler bearing to fall away and then the belt lost tension, valves kissed pistons and that was that.

Parts involved:

New genuine oem timing belt

NSK bearings

New idler bolt

stock cam gears

stock cams

Now onto the bolt. I bought this bolt as a new genuine item, and after comparing it to the original bolt there are some differences.

Original bolt is cad plated, and the threads are smooth cut, maybe even a rolled thread.

The new replacement has the same markings and dimensions but is zinc or similar plated and has rough cut threads. The rough cut threads can be the start of stress raisers in the metal and fatigue over time. I'm sure this is what happened to the new bolt.

I'm thinking of getting the bolts tested against originals to see if there is a difference in hardness etc.

And before some of you 'pros' say buy another, I've bought another 6 and they all look shit. Time for ARP spec or something else.

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

    • A few small updates since the previous post and lessons. I decided to do a little interior light upgrade on the 110. I quite like the iilumo items, even if they're a bit of a premium over other brands. You'll also note the Stedi Fogs, that will go into the S15 fog lights as I needed to match the bulbs since I got the new ones earlier. I hope they fit as the body is quite a bit longer than your normal bulb.  Annoyingly, I managed to trip the fuse, which normally wouldn't be an issue until I located the fuse. I can't say I've ever come across this. I had lucked out that someone nearby had a spare, but oddly enough Toyota dealerships seem to keep this in stock. I ordered some to keep in my stash and as luck would have it, someone else nearby tripped the same fuse so I passed on the favour.  I also did a little service on the 110 ahead of some additional work coming up. It's been annoying that Goleby's stopped carrying this particular HKS filter for the 110, so now I need to keep them on order from Japan. I also took the opportunity to install a bash plate and number plate riser. The plate riser is such a cheap but nice fix to help really tidy up the car. I'm tempted to now also replace my headlights, on this car. Both items were from Project Aero.    I also needed to replace the rear tyres on the 110, and after trying to get it aligned learnt that I need to replace some bushes in the front end, so that's next.  Closing out this update with a nicer picture as always! 
    • Yeah mate, never miss it.
    • Any going to watch World Time Attack at SMSP this year?
    • Appreciate the correction on the "ground", that will make a huge difference to looking at this. That makes complete sense about AF70/AF71 which is what I had come down to being the issue, one of these. I'll have another look in the ignition wiring when I get a chance next week. I'll also make up a jumper wire for running that AF73 test.  ECU is fine, relay itself is fine, pump harness is fine and the pump itself is fine. I am going to upgrade the Walbro 255 anyway with a DW300 I have since I need to replace the fuel sender and I'm going to upgrade the FPR with my chasebays kit ready for new plenum/injectors/dbw, but I'll get this working first. That's why this is so frustrating. 
×
×
  • Create New...