What Killed this motor? Side seals wore out after 1k miles.
Thats pretty crazy and that iron was really burned up I like reading things like this because it provides knowledge to others (including myself) who arent too experienced with rotaries
I guess my question is - what is THIS ****?
^^^ What is the cause of the scratches above the exhaust port? I know these housings weren't pristine prior to assembly but I don't remember them looking like bad.
Also, I notice a lot of running engines I disassemble have these deep marks. I'm pretty sure they aren't seals coming out of the motor because the entire housing usually gets chewed pretty good.
In fact, most of the shitty emergency use only housings have these claw marks right above the exhaust port.
Am I just (un)lucky or is there a common cause for this?
^^^ What is the cause of the scratches above the exhaust port? I know these housings weren't pristine prior to assembly but I don't remember them looking like bad.
Also, I notice a lot of running engines I disassemble have these deep marks. I'm pretty sure they aren't seals coming out of the motor because the entire housing usually gets chewed pretty good.
In fact, most of the shitty emergency use only housings have these claw marks right above the exhaust port.
Am I just (un)lucky or is there a common cause for this?
I overfill by a quart just to be sure. One talented engine builder said to check the dipstick with the engine running....
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Joined: May 2007
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From: kentucky
I guess my question is - what is THIS ****?
^^^ What is the cause of the scratches above the exhaust port? I know these housings weren't pristine prior to assembly but I don't remember them looking like bad.
Also, I notice a lot of running engines I disassemble have these deep marks. I'm pretty sure they aren't seals coming out of the motor because the entire housing usually gets chewed pretty good.
In fact, most of the shitty emergency use only housings have these claw marks right above the exhaust port.
Am I just (un)lucky or is there a common cause for this?
^^^ What is the cause of the scratches above the exhaust port? I know these housings weren't pristine prior to assembly but I don't remember them looking like bad.
Also, I notice a lot of running engines I disassemble have these deep marks. I'm pretty sure they aren't seals coming out of the motor because the entire housing usually gets chewed pretty good.
In fact, most of the shitty emergency use only housings have these claw marks right above the exhaust port.
Am I just (un)lucky or is there a common cause for this?
no it won't, if you actually seal the pan properly. or if it's an FD3S with their shittastic pan and mount design.
We DID have two turbo failures in the race prior to the last one.
One turbo lost a turbine fin only and the other one grenanded.
I think adding a half quart over full in addition to an oil pan baffle would be a good thing for us.
One turbo lost a turbine fin only and the other one grenanded.
I think adding a half quart over full in addition to an oil pan baffle would be a good thing for us.
the grenaded turbo could have sent debris into the intercooler which laid dormant until it got sucked into the engine later. even if the engine appears to be running ok, whenever you have an issue with the cold side compressor a flush of the intercooler core isn't a bad idea. even small chips of aluminum can cause the gouging you found.
rat ta tat tat
Joined: Aug 2012
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From: pinwheel galaxy
Scott said the thrust bearings didn't show heat stress or wearing so I don't think it was a end play issue.
You forgot to say this engine was run in enduro racing with 16-24 hours (per race)of hard full turbo power running.
The mileage is way over 1000 miles but it still died early. This motor was build with alot of tired parts.
Feb race 225laps = 535.5 miles
Apr race 280laps = 700 miles
Jun race 267laps = 635.5 miles
Oct race 229laps = 545 miles
Dec race 223laps = 557.5 miles
Figuring the track run time at 70:40:58 almost 71 hours
Total = 2973.5 + a test-an-tune day that Scott bet it to death and it over heated when it blew the turbo water feed line.
You forgot to say this engine was run in enduro racing with 16-24 hours (per race)of hard full turbo power running.
The mileage is way over 1000 miles but it still died early. This motor was build with alot of tired parts.
Feb race 225laps = 535.5 miles
Apr race 280laps = 700 miles
Jun race 267laps = 635.5 miles
Oct race 229laps = 545 miles
Dec race 223laps = 557.5 miles
Figuring the track run time at 70:40:58 almost 71 hours
Total = 2973.5 + a test-an-tune day that Scott bet it to death and it over heated when it blew the turbo water feed line.
Thermo pellet failure??? I still look at the discoloration on the side irons. What did your oil pressure look like? I f'ed up on a porting job and cut in the wrong direction and fear wiping the oil off of the oil control rings, this post gives me nightmares.
Last edited by Brandon Robinson; Oct 31, 2012 at 08:25 PM.
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