View Poll Results: What blew your last engine?
Blown coolant seal and/or overheating.
29
45.31%
Leaking oil seal.
3
4.69%
Bad knocking.
4
6.25%
Poor compression or lost an apex seal to something besides knocking.
9
14.06%
Bad lubrication (drove w/ no oil in the sump, etc.)
5
7.81%
Other (please post)
14
21.88%
Voters: 64. You may not vote on this poll
Survey: What Blew Your Engine?
07-31-07, 10:02 PM
#1
Survey: What Blew Your Engine?
So I'm curious about what eventually destroys people's engine. Please respond to the survey if and only if you've had a blown engine before and you replaced it or otherwise moved on. To prevent guesses, please don't respond if you think your engine might currently be blown. I'm sorry if the options given aren't very good. If I knew everything about what blows engines I wouldn't be posting this poll. And yes, I searched.
07-31-07, 10:14 PM
#2
2 Rotors, 1 Turbo
Join Date: Feb 2004
Location: Atlanta, GA
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I removed mine in favor of a Turbo engine. The old motor will be rebuilt, bridgeported and dumped into an FB, which will most likely be a huge pain in the ***.
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08-01-07, 02:12 AM
#9
In my turbo2:
engine #1 came in car: was a frankenblock with s4 and s5 parts, don't know how it held together as long as it did
engine #2 from mazmart: made 400+rwhp on stock motor with a bunch of boost. eventually had coolant issues. After teardown the water passages had bunches of rust spots. Apparently this block sat around a while without proper treatment.
http://countercultured.net/pics/cars...4/IMG_0009.JPG
engine #3 built myself: after tuning and taking this out on the highway.. 20psi pull in 4th and suddently the boost spiked up and pegged my gauge. My abs unit leaked on a boost hose to the wastegate and the hose blew a hole in itself. Replaced ABS with a T-block
in my fd:
engine #1: fuel pump failed during a highway pull
engine #2: I rebuild said engine and forget to flush the oil coolers, bye bye soft seals and bearings.
engine #3: fuel injector harness issue
engine #1 came in car: was a frankenblock with s4 and s5 parts, don't know how it held together as long as it did
engine #2 from mazmart: made 400+rwhp on stock motor with a bunch of boost. eventually had coolant issues. After teardown the water passages had bunches of rust spots. Apparently this block sat around a while without proper treatment.
http://countercultured.net/pics/cars...4/IMG_0009.JPG
engine #3 built myself: after tuning and taking this out on the highway.. 20psi pull in 4th and suddently the boost spiked up and pegged my gauge. My abs unit leaked on a boost hose to the wastegate and the hose blew a hole in itself. Replaced ABS with a T-block
in my fd:
engine #1: fuel pump failed during a highway pull
engine #2: I rebuild said engine and forget to flush the oil coolers, bye bye soft seals and bearings.
engine #3: fuel injector harness issue
08-01-07, 08:06 AM
#12
1: detonated at 15psi, stock everything... oops :P
2: detonated at 1/3 throttle and 3500RPM, maybe 6-7psi. Still not sure WTF happened here, maybe a knock sensor issue
3: Overrevved killed the compression, engine still worked fine but was hard to start. Rebuilt and halfbridged. Hasn't died yet
other engines that I've killed:
1 in my vert: died at idle, spat an apex seal
2 in my vert: Sllooowww death from a coolant seal. Just pulled it out and am replacing it now.
2: detonated at 1/3 throttle and 3500RPM, maybe 6-7psi. Still not sure WTF happened here, maybe a knock sensor issue
3: Overrevved killed the compression, engine still worked fine but was hard to start. Rebuilt and halfbridged. Hasn't died yet
other engines that I've killed:
1 in my vert: died at idle, spat an apex seal
2 in my vert: Sllooowww death from a coolant seal. Just pulled it out and am replacing it now.
08-01-07, 07:06 PM
#14
What causes a spun bearing? EDIT: nmind I lost my laziness and searched. Usually caused by having no oil on the bearing, if it happens in a stock engine anyway.
Too bad I can't let people vote more than once. If you post(ed) multiple blown engines, please specify which one determined your vote. When this is over I'll tally up the extra engines and post the real vote totals.
Too bad I can't let people vote more than once. If you post(ed) multiple blown engines, please specify which one determined your vote. When this is over I'll tally up the extra engines and post the real vote totals.
08-01-07, 07:35 PM
#15
Blew mine due to detonation (I am 99%) sure. I had removed the front cover to fix an oil leak. Had everything back together nice and neat. Must have bothced the timing marks though. The car started up perfect and ran perfect, even when I got on it. Made boost, and had 10.0 AFR's while on boost. The next day I was on my way to a rotary meet when I nailed it in 1st, shifted to second and it hit around 6k and just died out. The car shook violently and I limped home on one rotor. I assume the timing ended up too advanced and I blew it out the rear rotor. Thankfully the seals didn't hit my turbo. Time for a temporary engine and a rebuild 
when I nailed it in 1st, shifted to second and it hit around 6k and just died out. The car shook violently and I limped home on one rotor. I assume the timing ended up too advanced and I blew it out the rear rotor. Thankfully the seals didn't hit my turbo. Time for a temporary engine and a rebuild
08-01-07, 11:07 PM
#19
Senior Member
Join Date: Nov 2004
Location: dallas, TX 75228
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only difference was it was my own carelesness to pop the hood up and inspect everything like i had already made a habit... snapped alt belt killed everything.
looked like Final Destination to a squatt on my engine coolant system.
08-02-07, 01:55 AM
#21
OMG ITS A TRIANGLE!
Join Date: Jan 2006
Location: San Francisco
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coolant seal started to leak. eventually it started smoking a lot during start ups. it usually started on 1 rotor till the other rotor cleared up the leaking coolant.
only 75k on original motor too T.T
only 75k on original motor too T.T
08-02-07, 01:58 AM
#22
My Stant POS t-stat stuck and fried my coolant seals and managed to take a 1 inch chunk out of the front iron casting. The factory temp guage sucks. OEM t-stats from here on out! Since the overheating, I toredown, ported and rebuilt the entire motor myself. All the hard work is done, but only if it runs when I put it back in the car!
