[Supras] Partially Locked Engine - '86.5 Supra

[Dana Franklin]

Another thing to check is to make sure the starter isn't hung in the 
flywheel.  Never had that happen on a supra, but have seen it on other cars.

Bob wrote:

>Pull the plugs... could you have a blown head gasket and it leaked coolant
>into one of the cylinders?
>
>This could explain the shredded belt....
>
>This would also explain why you can only turn the engine so far.
>
>The only way I would think a valve could hit the piston is if the head had
>been machined a lot... Kind of doubt full
>
>Bob
>
>
>
>-----Original Message-----
>From: supras-bounces at supras.com [mailto:supras-bounces at supras.com] On Behalf
>Of Christian, Skip
>Sent: Monday, September 11, 2006 3:08 PM
>To: supras at supras.com
>Subject: [Supras] Partially Locked Engine - '86.5 Supra
>
>Group,
>
>	I think my supra days are coming to an end (after 17 years !!).
>Before reading on, you need to know I'm not a novice at car work
>including installing cam belts/chains.  Been doing my own car work since
>about 1973.
>	You guys were correct about my timing belt breaking (shredding
>is more like what happened).  But it gets more bizarre.  I removed,
>scraped, cleaned, & vacuumed the old belt out.  Installed the new belt,
>with new water pump and idler pulley.  Then, after reassembly, turned
>the engine over two revolutions using a breaker bar on the crank pulley
>- went nice & smooth and cam marks stayed lined up.  After charging the
>battery, I attempted to start the car.  No start & it didn't sound right
>when being cranked.  So, I put the breaker bar back on the pulley and
>tried to turn it to TDC (compression).  At about 10 degrees BTDC the
>pulley would not turn any further.  Turned the crank the other way and
>it would not go any further than about 10 degrees ATDC.  Cam timing
>marks looked good (I've done the timing belt job four or five times with
>no problems).  So, I removed everything, except the water pump, and
>there were no crank obstructions.......
>	Here's my question.  Has anyone ever heard of bending a valve
>(with the cam timing correct) when cranking when the engine previously
>turned over freely by hand ???  Finally, has anyone experienced a locked
>engine from anything other than a bent valve (excluding thrown rods,
>etc.)  ??  Before belt broke, engine ran fine with good oil pressure.
>	Most likely, I will have to get rid of both Supras since I don't
>have the time to tear it down (or the space to park it - too many cars).
>If anyone out there has a MA70 turbo with a bad body/interior, you
>should at least look at mine as replacements.  Both have excellent
>bodies and one has an excellent interior.  Hopefully, I'll get lucky
>(ha, ha, ha, right), and the head won't have to come off - after all,
>these are non-interference engines, right !?!?!
>
>Appreciate The Help, Skip
>'86 & '88 NAs (now both parts cars ??)
>_______________________________________________
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>
>
>  
>

-- 
Dana Franklin a.k.a. "Bones"  87T

SOGI Member (Supra Owners Group International) http://www.supras.com
SCORE Member (Savannah-Chatham Offroad Racing Enthusiasts)  http://www.score-racing.org