Maybe a dumb question but, can I use an Fc gasket set to, rebuild my 93 with. Other than the oil pan, I don't see what differences there would be in gaskets. Perhaps the material it is made of? The reason I ask obviously is because of the price differences.

 

I believe the internal gaskets (water seals, o-rings, etc.) are all the same, but pretty much all the external gaskets are different - ie, front cover gasket, lower intake manifold, etc.

Buying an FC gasket kit you'd end up with a ton of gaskets you had no use for, but you paid for. I think there is an internal engine gasket kit available, though.

BTW, some time back I believe someone added up the costs of the gaskets individually and buying them as a kit - the cost came out the same. Not sure if that still holds true, though.

Dale

 

not a single site i went to had the same listing for an FC and FD part number for a short block rebuild kit so there must be slight variances, though i'm sure the inner and outer o-rings are the same and most of the rest of the seals there may be some key parts missing that you would need. the installation gaskets are all different so that is not even thinkable.

 

whats the installation gaskets?

Sorry, yes that is what I was referring to the internals, such as the oil seals, o-rings, and water seals that mate the housings to each other. I have seen several sets go for 200$, but for the fd nothing under 550$. That is why, well, I was thinking if they are the same that is a huge price difference. I wouldn't use fc apex seals but what are the difference, between the two anyhow? I wasn't sure, because they are all advertised as, either non-turbo, turbo, and of course 93-95 FD gasket sets.

 

IF you just need to do a shortblock, then get an 86-88 NA gasket kit from atkins...comes with everything (minus rotor seals and springs) to do the shortblock and internals with...coolant seals, dowelpin orings, tension bolt seals, front cover gasket, front cover oil oring, front pulley bolt oring and crush washer, etc. The FD gasket kit (again, no rotor seals) runs around $450, while the s4 NA one runs around $140. The FC front cover gasket can be used on an FD with a *very* slight modification.

IF your external gaskets and such aren't in good shape, then you need to get the FD kit to begin with. Most motors after about 97 have the metal gaskets, which are reuseable...and most FD's are on their second engine at least, so many have reuseable gaskets already.

FYI, all internal rotor seals and springs are identical between 86-95 rotaries, other than the 93+ cornerseal springs being upgraded. Until mazda made the switch to rx-8 2pc apex seals this year, all 86-95 rotaries used the same 3pc apex seals. Same still holds true, just with the 2pc seal now being used in all rotaries both new and mazda reman. Side seals and springs, oil rings and springs, apex springs, and corner seals are all the same 86-95.

 

Good god! THat answered any possible question I could possibly have. Thanks so very much. But, then why such a price difference if the gaskets are the same. Is it basically profitting off of peoples ignorance? From what your saying, I don't see how the FD parts other than the external metal gaskets are any better than the FC, yet the FD's are double the price.

 

I never said the GASKETS were the same; they're totally different. I said the ROTOR SEALS were the same. The gaskets are totally different, and most of the FD gasket kits are now metal. There are several metal turbo gaskets for an FD, this makes the cost much higher...the NA's can get by with a cheaper exhaust gasket.

 

Basically, I'm confused now, lol. All my external gaskets which lie beyond the shortblock are good, they are metal as you said (im, uim, everything turbo and exhaust). My only need of gaskets or rather seals would be the internal portion, (ie coolant seals, dowelpin orings, tension bolt seals, front cover gasket, front cover oil oring, front pulley bolt oring and crush washer, etc.) everything to sandwich the housing back together, none of those off the top of my head are made of metal other than the metal lining one that goes around the inside of the housing, I believe one is orange and one is black, there long and thin they go around the inner housing, they are included in all of the rebuild gaskets I have seen. I will be replacing the rotor oil seals ect., front and rear main seals, but realize they would need to be purchased seperately. But from what I had gathered in your previous post the only gasket out of a set for the shortblock that was any different was the front cover gasket.

 

so all of those are the same fd or fc. So I'm guessing what your paying for in the FD set would be all the extra metal gaskets outside the shortblock, and now I understand why there is a difference.

 

thanks for explaining that it took a while to sink in.

 

evidently...

You have now confused even me, and I'm the one that knows the ****...