Number 3 piston from my old engine

General discussion about our beloved Tercel 4WD cars
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Mac
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Joined: Wed Apr 06, 2005 12:02 pm
Location: surrey, BC, canada

Number 3 piston from my old engine

Post by Mac »

this looks interesting....

Image

and i don't think all the sea foam in the world could take this carbon off, keep in mind this piston has already been soaked for 2 days in solvent and then promptly scrubbed with various pads/wire brushes and chipped at. in the darker areas its about 1-2MM thick and ROCK HARD

Image

I think it may have been those 8000RPM shifts one wild night that caused the cracking...
Tercel 4WD "POWER WAGOON" with 4A-C
aka: "no powa steering tercel, oh oh oh!"
mods: ignition at 10 DBTDC and 90 octane gas.
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Typrus
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Joined: Sat Oct 23, 2004 4:43 pm
Location: Colorado

Post by Typrus »

Bottom pics a lil dark..

Wow. Good thing it didn't get worse, eh?

I dunno... I boiled my old exhaust valves in Simple Green for 20 min and they came out shiny. No intent of reusing them though.
RIP 10-07- 1984 Toyota Tercel SR5 4wd Wagen 6 speed

RIP 04-05- 1986 Toyota Tercel SR5 4wd Wagen 6 speed

1st Terc- 1987 Tercel SR5 4wd Wagon 6-speed, Sadly cubed

1985 Tercel Standard 4wd Wagon w/ 3-speed auto, Living a happy life in Boulder last I knew
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brianp
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Posts: 275
Joined: Sun Mar 06, 2005 4:52 pm
My tercel:: '85 4wd SR5, 220k miles
Location: Yamhill Co., OR

Post by brianp »

yikes! It would be interesting to have it analyzed to find out what caused failure. But wow, so that's what happens when you drive it to hard then.
'85 SR5 4wd, A.K.A 'Peach", 221k miles!
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shogun
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Joined: Thu Mar 31, 2005 1:48 pm

Post by shogun »

good thing it isnt on the car any more
tercel 4wd custom suspension, under drive pulley, vented brakes, cold air intake, and plenty more to come
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Lateer
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Joined: Mon Aug 23, 2004 11:25 pm
Location: Tasmania, Australia

Post by Lateer »

Just after I bought my Tercel (in the process of being sold, btw) it cracked a piston.
When we removed all 4, we found cracking in precisely the same spot. One had cracked all the way through, causing a bit of damage to the block. The other three were cracks on the order of 1/2 to 3/4 inch long.

This was just after I had problems with the cooling system and I think the engine got a little hot. I'm sure the carbon wedges them open, and I reckon your guess about the 8k rpm shifts was spot on.
1983 Tercel SR5 with 185/75R14 tyres, 32/36 DGAV Weber carburetor, lumpy cam and upgraded Pioneer sound system. Veteran of several fire seasons (with the scars to show it) and known as "The Racing Turtle"
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