porsche4786

What are the most common causes of needing a rebuild on a non turbo second gen?

arghx

iTrader: (3)

Eventually even a nonturbo will lose a seal depending on how the car was driven and maintained.

Atkins Mama

Wrong or no thermostat, overheating, Lack of oil, Not changing the oil so it breaks down & scores parts, No oil metering, wrong spark plugs, Over revving (breaks gears in extreme cases) Boy the list can go on & on

porsche4786

because I have a non turbo and i the water pump housing to engine gasket blew, and it was just replaced a couple months ago or so. the guy says it might need a rebuild because of combustion gases in the coolant? Also, he replaced the oil metering pump lines because at least 1 maybe more were melted to the motor, so it was overheated at one point in it's life. the car has just turned 60k original miles on everything. he said to go to napa and get a test kit to test the coolant for combustion gases in the coolant I believe. Does that sound right?

Also, he said something about the water seals getting hard and cracking.

felixwankel88

loosing compression is usally why peeps rebuild, somtime they decide to do it too late, and a seal had allready broke

RotaryEvolution

iTrader: (30)

actually the main cause of failure from what i have seen is the poor engineered iron machining processes, the iron's coolant seal wall weakens and breaks off into the coolant passage and the seals blow out because of this.

second i would say is the OMP lubrication system, i do not trust the system because the crankcase oil is not meant to be burned and it only lubricates the center section of the apex seal which causes scoring in the housing which can cause low compression which is why most people rebuild due to hot start or flooding issues.

3rd is apex seal failures which are usually caused by just weak apex seals or improperly running engines.


fit this one in where you wish, it varies from state to state because of varying ambient conditions: improperly stored engines.

lastphaseofthis

iTrader: (8)

karack, is this excluding human error? b/c overheating would be the number one if you didnt, like my dumbass roommate, just ran its b2200 for almost a week with less than a half a quart of oil in his engine, now its knocks like a tricker treater...

RotaryEvolution

iTrader: (30)

well i'm more or so listing failures on engines that were built properly or original mileage engines.

and i still believe that a rotary with new seals should be able to handle being mildly overheated and retain its composure. i took my S4 T2 to the top of the gauge after rebuilding it the first time(coolant leak) and the seals were still fine however the engine did fail 4k miles later from a different issue so i was able to inspect everything and the seals were still sealing just fine.

Whizbang

how does winter weather affect a 7? im may be getting a NA for a DD and it will have to contend with ohio winters

porsche4786

Mine has done fine, it's my only car. I've driven it in the snow a couple times(just in the neighborhood, and one time from work less than 1 mile) when it did snow here...

RETed

Stupid owners who don't know how to properly maintain the car...


-Ted

Ballin_is_a_Habit

hmmm i was mysteriously losing coolant for a while... seems to have randomly stopped but might this be a sign of early warning? damn... just tell me no lol

porsche4786

It's not leaking...it blew, coolant everywhere.