1680s don\'t fit into LIM?

[m1tch]

Hi all, I have not got round to fitting the larger secondary injectors into my FC. I have a KG secondary rail (thats fine) but the actual 1680 injectors don\'t fit into the LIM, do I have to remove the hard plastic injector spacer? I have no idea why its not fitting what am I doing wrong?

[m1tch]

Do I need these?

http://www.ebay.co.uk/itm/Mazda-RX7-FD-92-Injector-Collars-Spacers-5TWENTY4-/250915107510?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3a6bb4b2b6

Im really really losing faith in my car now, its just problem after problem!

[lee mills]

yes you do have to remove the injector collars:Thumbsup!

[m1tch]

Seems that the FD ones are fine for FC secondaries, would have needed longer ones if I were replacing primaries

http://www.banzai-racing.com/store/fuel_rails.html

So, those spacers in the LIM are just small plastic spacers and not those injector diffusers?

http://www.ebay.co.uk/itm/MAZDA-RX7-INJECTOR-DIFFUSERS-/220801292397

Or is there an injector diffuser below the spacer?

Also HOW do I remove just the spacer and not the diffuser?

[HaywardRotary]

You need to modify the stock rail too.

[m1tch]

I don\'t have a stock rail, its a KG parts rail so it can accept the larger size injectors, I now have those injector spacers/insulators which are now in the freezer, is it just a case of dropping those into the LIM onto of the diffuser?

[m1tch]

Right, I have fitted the injector collars, the injectors fit in fine and will seal fine to the collar BUT something isn\'t right, there is a gap and the rail isn\'t sitting correctly.

The collars have been fitted into the LIM into the OEM diffusers but the collars are sitting proud of the lip of the LIM.

PLEASE HELP! I have no clue why my car is so hard to work on, they should just drop in so I can just bolt down the rail. I can easily pull out the rail and injector assembly without any force, im guessing the collars seal by mechanical force from the bolts ont he rail?

Here is the issue I now have! This is no longer funny and a real issue now

OEM diffuser (spacer is ment to fit on top?)



Rail fitted with injectors - you can see the spacers



MASSIVE gap meaning I can\'t bolt down the rail

[m1tch]

I DO NOT want to remove the LIM as I would have to take out the OMP as well, I NEED help on this

[Prof]

When the collars are not in the injector mounts, how far down is that rubber grommet I can see ?
 
It doesn\'t look very far down - so you\'ve got something in there that should come out I think.

[m1tch]

I need to remove the diffusers, I can see them via the intake runners, I don\'t have a pick or anything to get them out and am rather worried about them snapping or dropping down, so I could put something underneeth them in the runner to stop this.

[Prof]

I need to remove the diffusers, I can see them via the intake runners, I don\'t have a pick or anything to get them out and am rather worried about them snapping or dropping down, so I could put something underneeth them in the runner to stop this.

Do you need to remove the whole thing, or just the breather part ?
 
The Diffuser / breather assembly is 2 different bits.  I don\'t know if those spacers require you to remove the breather or not.  But in the top of the hole, it looks like a black ring - which suggests a grommet is still in the injector seat.

[m1tch]

I had a feel of it and it seems to be solid, I don\'t have a pick to take it out, looking at the photos of the diffusers it does seem to have an O ring on top, hopefully its just that I need to remove rather than the whole assembly

[Grant Monkhouse]

Why can\'t you take the LIm off? I wouldn\'t be working on anything on the engine/intake without removing it first. Just in case something drops into the engine.

[lee mills]

Im preety certain that when Tim did mine he took the diffusers out hth

[Prof]

Seems this issue is not an uncommon one - found this thread over on the rx7club:
 
http://www.rx7club.com/showthread.php?t=720861&highlight=bosch+1680+injector
 
And mitch - you\'re replacing stock parts with aftermarket parts - you are going to get some issues like this - just take your time and seek advice when it doesn\'t seem to fit / work.