Recently i had my engine rebuilt and upon breakdown we noticed that my coolant seal on my front housing had completrly failed. there was a little drop in compression but not bad

My symptoms:
excessive white smoke upon startup
Sound like a running facuet on my passenger side firewall
drop in idle when the car was warm
also the engine was ver weak.

here are some pics and they can hopefully help someone daignose there problem.

 

Very cool. For people who rebuild engines this is probably very old hat, but for people who don't know know rotaries it's good to see.

Are all of those black sections of o-ring shot?

Do you have full res pics? If you want I can host them for you. In any case, it would be cool to see in tighter detail.

 

huh i had all those symptoms with a 3 inch whole in my water seal but my apex seals are fine

 

The cause of this is periodic overheating due to the inadequate stock cooling system and Mazda setting the overheat function on the stock ECU way too high. Oh Yeah, and a water temp gauge that ruins your engine by the time it shows overheating.

I do not know of anyone here in Houston having this failure after fixing these problems and running a PFC.

 

when i bought my car i found out later that i had a clogged cat. yes all those black marks is the burnt coolant seal If you have a clogged that you know you of replce it immediately


My apex seals were perfectly fine. Thanks god or else my rebuild would have cost ALOT! more.

 

its a shame the coolant seal isnt somthign mroe durable than a thin ring of rubber i can only imagine if it was maybe 4 times as thick would they ever go out like they do?

 

Some vendors have the teflon encapsulated coolant seals. From my understanding, they are 100 x better than the stock seals.

 

those are the seals that i have now!

 

does anyone sell Viton coolant seals?

 

I've heard them mentioned. There are some very very heavy duty seals available. Just alot more costly, but could be worth the effort for a "bullet proof" rotary.

 

are you running the stock radiator?

 

charlie,

Where did you purchase your teflon coated seals?

 

I am running a fluidyne rad right now

 

Banzai racing in indiana rebuilt my engine. You would have to talk to them www.banzairacing.net

 

Charlie,
Here's the link to your pages showing pics of the entire breakdown, rebuild and install, just in case you lost it.

http://banzairacing.net/charlieR_rebuild_04-05.htm

 

Some people have gone as far as to have "Nuclear Grade O-Rings" made. A Stainless steel Helical sring wrapped with a SS Liner and coated in Pure silver.

 

Holy crap!! I have the exact same symptoms!! I'm pissed because if tried like 5 times to get all the air out of the system, but now i know it's no use. hhhmmm now do i rebuild or just go v8?!?! Decisions decisions. Thanks for the great post!!!!

 

get a rebuild and send your engine to banzai racing...chris builds great engines..mine is getting stronger and stronger im am pulling about 17-18 in of vac at idle now! RX-7 is meant to have a rotary.

 

if any of you guys whant real coolant seals i got someone overhere in miami he sells some type of coolant seals that they use to race his name is lopez racing tryv those coolant seals his phone is 305-255-1352

 

I'm resurrecting this ****' because of a stupid question: are the O Rings in rebuild kits the coolant seals?

I've got smoke at startup, I've had to refill my coolant with no apparent leaks, and I started my engine with the rad cap off, but I cut the engine before the coolant overflowed (maybe I put too much coolant in?). These sound like signs of a blown coolant seal so I'm researching engine rebuild options.

 

Smoke at start up is normal. When it does happen it's usually the turbos. Don't sweat it.

 

I'm not so sure that it's water condensation--I've done some searching and even saw a video between the two and I wouldn't doubt that it could be bad coolant seals. What further pushes this suspicion was the fact that I had the "Add Coolant" alarm buzz without any visible leaks. I'm also experiencing an unsteady idle, in that it fluctuates between 1100-1400 RPMs. I really need to get my FD checked out.

Can anybody answer my question above regarding O Rings and Coolant seals? Are they the same thing?

 

Nice freaking ports on your motor!

 

um those appear to be stock ports.

 

ouch