Help Needed

[granca69]

My r23's head stuffed up so i canged the head and it wont tstart, im thuinking the head maybe off the older rb20 as mines a eccs head but not sure if the new ones is, any way to tell, any suggestions.

[RB30-POWER]

Doubt you will get an answer that will pinpoint the problem on here.

First thing to do is check that the cambelt is installed correctly with everything on top dead centre.

Then if it won't start, and you think the head may be the problem, check the compression, to make sure its sealed properly.

If compression is good, check for spark and fuel and then continue until the fault is found.

[granca69]

thnx for da reply dude, howeva i have checked everything and it still wont start, the prob i fink is the cam angle sensor, the old cam has like a half moon bit on the end that goes intoi te sensor, this one has a full moon shape on the end, n e thoughts

[blind_elk]

... the old cam has like a half moon bit on the end that goes intoi te sensor, this one has a full moon shape on the end, n e thoughts

<{POST_SNAPBACK}>

The locating key on the new head is broken. You need to peer down into the end of the cam, you should see where the key used to be connected. Then you need to visualise where the matching key in the CAS would line up with the cam's key.

[granca69]

do these engines use two different cam angle sensors perhaps or all years the same ones, as the new head didnt have cam angle sensor, just new cams, last ones are seized

[blind_elk]

Pretty much the same CAS. I've fitted a RB25 CAS onto a RB20 with no dramas.

[granca69]

well i fnk wat u said before would be addaquate, ill see if i can get it going, cheers for ya help, ne other ideas u can give me does anyone know if the rb20's changed cams at all

[blind_elk]

Well I think what you said before would be adequate. I'll see if I can get it going. Cheers for your help. Any other ideas you can give me; does anyone know if the rb20's changed cams at all

<{POST_SNAPBACK}>

I think that is what you said.

AFAIK all the (silver) RB20s ran the same cams (the red ones were slightly different lift / duration).

I doubt it's a problem with the cams as such. You should be able to hear the engine firing, it's just that it's firing at the wrong time in the cycle.

The CAS and cam align on a set of teeth as well. The teeth are far enough apart that the engine will only fire when the CAS is close to the correct position. Worst case, you should eventually get there by moving the CAS 1 set of teeth at a time until the engine fires somewhere near the right spot.

[granca69]

yea its almost therethats the fing, it kick ova and the second its about to start it soundls like it just cant get that last step

[granca69]

well got it too start, but now a better problem, its not gettong juice, to start it i have to put some juice directly in the engine ad it sounds like its runnin on two cylinders, thinking afm or computer, how do i rest the computer