Jump to content
SAU Community

Recommended Posts

I just complete an install of an 'OS Giken' adjustable cam gear on to the end of my exhaust cam shaft. As you know the 'cam angle sensor (cas)' sits on the outside of the cam gear on the exhaust cam side. Now on the 'OS Giken' adjsuatble cam gear in the centre there are 4 locating wholes (four bolts run through) and a locating pin whole to make sure the cam gear is correctly alligned. The same as all RB cam gears. Around the outside of the 4 locating wholes there are another four securing allen key bolts that alow for the sleve adjustment of the cam gear.

My problem is with the 'Cas' and 'Cas housing' ontop of the exhaust adjustable cam gear the 4 securing allen key bolts rub/grind on the 'cas housing'. Basically it makes an awful noise not that ive run it for more that 30seconds, and im wondering if anyone else has expierenced this sort of problem before with this sort of item and how they have over come this?

Im not quite sure what i should do? The first option im looking at is placing 1, 2, or maybe three washers under the three locating 'Cas housing' bolts an see if it elivates it enough off the cam gear so the 4 adjusting allen key bolts no longer rub. The doubt i have with this is maybe the 'Cas' wont actually be able to work because its to far away from the locater (half moon at the end of the cam) that it wont run. The other options i have is put the standard itme back on, which i dont really see as an option, or last of all maybe grind a bit of each of the 4 adjusting allen key bolts so they no longer rub on the 'Cas housing'. Anyone with some helpful advice much appreciated because i would like to have it all sorted tommorrow night so mum can have her carpark back. cheers

Link to comment
https://www.sau.com.au/forums/topic/86616-adjustable-cam-gear-problems/
Share on other sites

ive a simmilar problem on my 20 right now and its due to the lack of the gasket/insulator thats normaly on the front timing cover as mine was destroyed when it got powdercoated.......

if the cas securing bolts (3) are rubbing then perhaps cut the tips off with a dremmel tool.

else try puting some kind of space between the bolts when you bolt the cas on and see if that helps.

You dont say in you reinstalled the front cover , if you havent thats your problem . You will need to use a washer /spacer in each bolt .

The washers spacers have to be all the same thickness and about the same thickness as the the cover . Place washers /spacers on first then the cas then bolt it on and it will be fine .

The next step is to time it with a timing light , if you dont have one try to put it back where it was before , drive easy and take it somewhere to ajust the timing then to a tuner to ajust the cam gear .

cheers guys, yeah i have no top timing cover off 'wrxhoon' its been off since i did my water pump, t-belt, tensioner, and thermostat about a year ago. i had completely forgotten that the cas sits on the outside of the upper timing belt cover, that would be the cause then. anyways bought some washers home from work today (i am a mechanic blitz), il see how i go tonight, il find the upper timing belt cover thats has to be somewhere around and all should be well, il match the washers to the thickness of the cover an thumbs up.

havent had the cover on for the last year, hasnt been a problem nore have i got my spark plug cover on. Easy access and good for obervation, its only neccessary to stop people fiddling with the cam belt at a glance. There is a round plate that sits over the crank behind the harmonic balanncers that stop the timing belt from sliding forwards and off, are you saying the timing belt normally runs constantly on the inside of the upper timing cover?? anyways problem solved

its only neccessary to stop people fiddling with the cam belt at a glance.

Ummm, no. Its necessary to stop dirt and crap getting in. Of course if you would rather show of your bling cam gears than actually protecting them against wear, that's fine :P

Have you considered putting the cover on?  Kills two birds with one stone....

You have to have the cover off to ajust the cam gears . if you had it off for a year and it didnt hit there must have been washers there and you droped them when you took the CAS off .

You have to have the cover off to ajust the cam gears .

Really? I never would have guessed :D Somehow I don't think its taken a year to install them.... Nor do must people need to adjust them so frequently that the cover must remain off.

Anyway, he is entitled to do whatever he wants with his car but he shouldn't be under the illusion the cover is just there to stop people playing with the timing belt adjustment.

Really?  I never would have guessed ;)  Somehow I don't think its taken a year to install them.... Nor do must people need to adjust them so frequently that the cover must remain off.

Anyway, he is entitled to do whatever he wants with his car but he shouldn't be under the illusion the cover is just there to stop people playing with the timing belt adjustment.

I never said he has to have it off permanantly and i wouldn't leave mine off either ( i can assure you mine is always on ) its there for various reasons .

When he put the gears on he has to take it to a tuner with a dyno to adjust them so there is no point in puting the cover back on until all that is done , is there ?

Of cousre he is intitled to do whatever he wants but if you remember he asked for help and i offered , he can take it or leave it , up to him .

As for the spark plug cover i leave mine off as well , it may save my coil packs from getting very hot and breaking down ( common problem with these engines ).

As for the spark plug cover i leave mine off as well , it may save my coil packs from getting very hot and breaking down ( common problem with these engines ).

I will also allow water, dust and dirt to get in and kill the coils prematurely. It's there for the same reason that the cam covers are there. Keep the crap out.

I have replaced 2 cam belts on RB's that had rock holes in them, one still had the rock embedded in the belt. I have also rebuilt one engine (not an RB) that had the cambelt jump a pulley due to a small stone. It's a gamble, rol the dice if you are feeling lucky (to miss quote a favourate movie "is that 5 bullets or 6"?).

;) cheers :)

I never said he has to have it off permanantly and i wouldn't leave mine off either ( i can assure you mine is always on ) its there for various reasons .

When he put the gears on he has to take it to a tuner with a dyno to adjust them so there is no point in puting the cover back on until all that is done , is there ?

Of cousre he is intitled to do whatever he wants but if you remember he asked for help and i offered , he can take it or leave it , up to him .

As for the spark plug cover i leave mine off as well , it may save my coil packs from getting very hot and breaking down ( common problem with these engines ).

Relax. The smilie was there to indicate I wasn't being serious. I realise he needs it off to install the gears and tune them, but it seems foolish to me to leave the covers off indefinately. Thats all. Not good if someone was searching for camgear info, came across this thread, and assumed the cover was irrelevant.

I will also allow water, dust and dirt to get in and kill the coils prematurely.  It's there for the same reason that the cam covers are there.  Keep the crap out.

I have replaced 2 cam belts on RB's that had rock holes in them, one still had the rock embedded in the belt.  I have also rebuilt one engine (not an RB) that had the cambelt jump a pulley due to a small stone.  It's a gamble, rol the dice if you are feeling lucky (to miss quote a favourate movie "is that 5 bullets or 6"?).

;) cheers  :)

Agree Gary but thats the risk that i choose to take . I feel that its better to keep them cooler .

Iwells , no bad feelings here buddy i was just commenting on your reply , i have no problem with anyones comments and if i did i wouldn't reply .

Edited by wrxhoon

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

    • Have a look at that (shitty) pic I posted. You can see AN -4 braided line coming to a -4 to 1/8 BSPT adapter, into a 1/8 BSPT T piece. The Haltech pressure sender is screwed into the long arm of the sender and factory sender (pre your pic) into the T side. You can also see the cable tie holding the whole contraption in place. Is it better than mounting the sender direct to your engine fitting......yes because it removes that vibration as the engine revs out 50 times every lap and that factory sender is pretty big. Is it necessary for you......well I've got no idea, I just don't like something important failing twice so over-engineer it to the moon!
    • Yup. You can get creative and make a sort of "bracket" with cable ties. Put 2 around the sender with a third passing underneath them strapped down against the sender. Then that third one is able to be passed through some hole at right angles to the orientation of the sender. Or some variation on the theme. Yes.... ummm, with caveats? I mean, the sender is BSP and you would likely have AN stuff on the hose, so yes, there would be the adapter you mention. But the block end will either be 1/8 NPT if that thread is still OK in there, or you can drill and tap it out to 1/4 BSP or NPT and use appropriate adapter there. As it stands, your mention of 1/8 BSPT male seems... wrong for the 1/8 NPT female it has to go into. The hose will be better, because even with the bush, the mass of the sender will be "hanging" off a hard threaded connection and will add some stress/strain to that. It might fail in the future. The hose eliminates almost all such risk - but adds in several more threaded connections to leak from! It really should be tapered, but it looks very long in that photo with no taper visible. If you have it in hand you should be able to see if it tapered or not. There technically is no possibility of a mechanical seal with a parallel male in a parallel female, so it is hard to believe that it is parallel male, but weirder things have happened. Maybe it's meant to seat on some surface when screwed in on the original installation? Anyway, at that thread size, parallel in parallel, with tape and goop, will seal just fine.
    • How do you propose I cable tie this: To something securely? Is it really just a case of finding a couple of holes and ziptying it there so it never goes flying or starts dangling around, more or less? Then run a 1/8 BSP Female to [hose adapter of choice?/AN?] and then the opposing fitting at the bush-into-oil-block end? being the hose-into-realistically likely a 1/8 BSPT male) Is this going to provide any real benefit over using a stainless/steel 1/4 to 1/8 BSPT reducing bush? I am making the assumption the OEM sender is BSPT not BSPP/BSP
    • I fashioned a ramp out of a couple of pieces of 140x35 lumber, to get the bumper up slightly, and then one of these is what I use
    • I wouldn't worry about dissimilar metal corrosion, should you just buy/make a steel replacement. There will be thread tape and sealant compound between the metals. The few little spots where they touch each other will be deep inside the joint, unable to get wet. And the alloy block is much much larger than a small steel fitting, so there is plenty of "sacrificial" capacity there. Any bush you put in there will be dissimilar anyway. Either steel or brass. Maybe stainless. All of them are different to the other parts in the chain. But what I said above still applies.
×
×
  • Create New...