rx7nam

im at 128k original motor and turbos but water seal just started leaking.

tsmysak1

75K on the reman. Stock radiator and no temp gauge mod, which means I have no idea if it ever overheated. I bought it at 60 K. Pulled it down for a leaking coolant seal.

I would like to know what these numbers look like for teflon encapsulated coolant seals.

RaPtOr-T

Bought my car with like ~4k on a rebuild, and my car sits at ~136k....so 132k miles I suppose. Everything on the car was stock excluding the stereo system.

DrunkenBowler

101k on stock motor

revv_head

Im on 267km on my stock '79 RX-7 with original motor
secret is drive her how u like.
check oil everyday.
put more in if needed.
warm her up for 13minutes before driving
I use leaded sometimes aswell. (from my grandparents has 10,000LITRES on a farm kicks **** free petrol)

Cgotto6

iTrader: (8)

My original motor in my car went 147,000. Still started every time, and had plenty of power. Just a little white coolant smoke on start.

alexdimen

iTrader: (13)

i wonder how long you could get a new/well built motor to last with the OMP disabled, proper premixing, and regular water treatment. no heavy track use of course. i'd bet consistently over 100k. maybe closer to what TII's see? like 150k...

i'll let everyone know in 5-7 years

OneRotor

iTrader: (3)

SA's/FB's/NA FC's don't count

JConn2299

I think you may be on to something. I'm working on my own hypothesis regarding engine life. Most failures seem to involve coolant seal leaks. Detonation and apex seal failures seem to run a distant second.
Assuming the engine isn't over-modified and overstressed my theory is that corrosion is degrading the integrity of the coolant seals.

It's the corrosion inhibitors in anti-freeze that "wear out." Also, it needs to circulate in the engine fairly frequently. Just having the coolant sit there is not good. It can promote corrosion. So a 25,000 mile FD that sat for long periods could actually be in worse shape than an 85,000 mile car that's been run regularly and had it's anti-freeze changed using distilled water every two years.

I've seen numerous posts from people bragging about how frequently they change their oil. I don't think I've ever read a post by someone saying they change their anti-freeze at some super-short interval like every 6 months. Yet it's coolant seal leaks that seem to be killing the most engines.

DamonB

I do but it's only because I run different mixes for winter and summer.

My motor is run hard. The original motor made it to 98K before losing an apex seal (it had a leaky coolant seal long before that which I fixed with copper block weld). The bone stock reman in it now has 40+K on it and is still perfect. Engine and turbos are completely stock other than downpipe and catback.

exhaustnoteV2

iTrader: (9)

I think you're onto something. My car is up to almost 103K miles and still runs strong. I bought it with 90K on the original motor and the only mod was the downpipe (to remove the pre-cat).

As I drive about 100 miles a day, I check the water/coolant every few days and need to give it about 8 ounces worth every week. I haven't found any leaks, the water doesn't seem to be going anywhere.

The coolants were flushed back in Sept. and again in the spring. It's almost that time, again.

Upgrayedd

iTrader: (1)

95k+ no rebuilt motor or turbos yet, but right now the engine is in need of a rebuild. Turbos possibly need rebuilt, but they still boost strong

xstacy7

142k

Daniel577h

im still on my stock motor 104k miles and it still pulls strong and passes smog : )

Monkman33

iTrader: (28)

The original owner of mine made it 102k