SHO died after spirited take off.... making horrible grinding (SOLVED!!) :)

[vortex2450]

I was feeling giddy after a long day at work and take off from a stop light, I didn't give it enough gas to squeal the tires. ran up to 6500 rpm, drop into second and it catches @ 5000 rpm and bogs some, I'm going about 50, I let off, shift into 3rd and already I feel something is wrong, I put it in 4th and the car is definitely screwing up.

I make it about another 200 yards and the car dies. I roll off into a side street and when I go to crank the thing is just makes a grinding noise, I can't tell from where.

I tried and coupe times to start and the engine doesn't seem to turn over but I hear grinding. I look under and there's nothing leaking or dripping.

I walk to the first house on the block and the guy is great and gives me a ride back to my friend's house. I stopped at the car and this time it turned over twice like normal with no noise then started grinding again.

I'm totally about to breakdown, I've put so much time and love into this car and I'm so busy right now I can't afford this..

My thoughts after the initial shock went away are:

-I blew the diff
-started popped of the fly wheel
- the timing belt jumped
-shredded a rod bearing..

I dont know, any ideas???

 

[91PDXmocha]

Drop the starter and check the teeth on it and the flywheel . Also look inside with a flashlight to see if u can see anything broken or loose . Grinds in neutral as well ?
Next I'd drop the oilpan and inspect everything . Sounds like you blew the diff .

 

[vortex2450]

Roger, I was planning on checking the compression, timing belt, and dropping the pan as well. Yes it grinds in neutral but why would the engine not fire if the transmission is disengaged?

-josh


EDIT: if the diff blew could would I be able to push the car while in gear?

 

[91PDXmocha]

Maybe ?

If the car is in neutral and u can't Push it then u broke somthing big . Trans , rotating assembly, clutch .

 

[TimboSHO]

Even if your diff blew, you would still be able to start it. My first thought was timing belt, and that still holds. Pop the top cover loose and see if it turns while your buddy cranks. Not sure what the grinding is, audio/video of that would help....

 

[TimboSHO]

EDIT: if the diff blew could would I be able to push the car while in gear?

Depending on how bad you broke it, it may not hold while in gear.....

 

[vortex2450]

Maybe ?

If the car is in neutral and u can't Push it then u broke somthing big . Trans , rotating assembly, clutch .

I pushed the car about 30 feet solo so I'd say whatever it has to be functional for that to happen is still okay....

Even if your diff blew, you would still be able to start it. My first thought was timing belt, and that still holds. Pop the top cover loose and see if it turns while your buddy cranks. Not sure what the grinding is, audio/video of that would help....

The was my second thought after starter, I should be noted that I attempted to start the car while still rolling @ about 10 mph with the clutch in (it's died run running rich before) and that also resulted in the grinding noise.

I have a camera at home so I'll take a video and post it then go and start with compression testing, pulling off the starter...

That won't be until tomorrow after work though, looks like I'm in for another LONG night with the SHO again!!!


I am really really sick at my stomach, this is my only mode of transportation, no one is going to help me, and since the swap I've been under the car more than I've been driving it, am I cursed???


-Josh

 

[91PDXmocha]

If the timing belt jumped I don't know why it would be grinding . Suppose itcould be a tensioner or somthing if the grind is coming from the top of the motor not bottom .
Check and verify fuel and spark , that would narrow it down to mechanical failure.

 

[91PDXmocha]

Can u get it rolling and bump start it without the starter and see if it grinds . I'm now thinking the starter is loose or broken and the ground came loose ?

 

[vortex2450]

I'm not at the car right now, it's parked on the side of the road.... F.O.R.D. ehh?? har har I'm praying that the starter somehow locked up when I took off causing the engine to die... The car is parked on a flat surface, nowhere to really get momentum going...


I am going back to the car to leave a note, I've give it a crank and be more specific....


-Josh

EDIT: I turned it over twice, once in 1st clutch in and once in neutral, made no difference, the best way to describe the noise is the sound you would hear when dragging a chain over metal, AND I believed my timing chain wasn't properly tensioned (PO of engine claimed he did the valve lash very recently ) perhaps my launch just yanked the chain of one of both exhaust cam gears, if so how bad of a fix is this?

 

[91PDXmocha]

Id try and listen and if the " chain noise " is coming from one of the valve covers then you have found your problem. At that point I would just rip the heads off and swap in some junkyard ones . Throw in some valve stem seals while its off and run it.

 

[vortex2450]

Id try and listen and if the " chain noise " is coming from one of the valve covers then you have found your problem. At that point I would just rip the heads off and swap in some junkyard ones . Throw in some valve stem seals while its off and run it.

SO I am assuming this is an interference motor?

 

[kevinspann]

No, it is not an interference motor. I wish I were closer to help you out, you've had some bad luck.

 

[vortex2450]

No, it is not an interference motor. I wish I were closer to help you out, you've had some bad luck.

Bad luck or not you just made my day... :thankyou:


Ever since I've started the swap all I've had is problems I have literally spent more time working on the car than actually driving it.. In fact if I fixed this issue today I would have to drive for about 3 month (1hr round trip from work 6 days a week) before I would even break even in drive time vs wrench time...

I'm so exasperated right now, just last Tuesday I was up till 3 AM after a 10 hour work day replacing every o-ring on the top side of the engine...

Back on track, my game plan is to rip the intake and VC's off, I'm thinking one of the timing chains is wadded up. If it's not a timing chain I'm baffled, and then I'll drop oil pan that I just put a new gasket on ... XD

But I believe this is a timing issue, if a rod bearing spun then the car would still start at least for a little bit right?

I'm thinking out loud, I am really glad Yamaha didn't make this an interference engine......

I am having doubts about even wanting to keep this car if this is a sign of what my ownership of it will always be...

-Josh

 

[kevinspann]

does the engine physically turn over?

 

[vortex2450]

does the engine physically turn over?

No, the cams move for a split second and the stop (as if wedged) and then you here the "grind" noise...... I would take a video but I want to refrain from doing that again....

-Josh



EDIT: Took the starter off, there is some metal ground off the end of a couple the fly wheel teeth near the starter. Proceeded to turn the crank and the crank will turn but the cams don't, so now I'm going to eat lunch and prepare to attack the acc side for the 10000000th time....

When I did my timing I did it right on the money, maybe I didn't tighten the tensioner down enough????

The crank will turn though which is good....

 

[JRA2000TL]

Timing belt breakage won't cause the engine to grind. I just shredded both acc belts AND the t-belt on the 89. The starter just spins but won't turn over and acts like a simple "no-start" problem.

If your crank turns but cams dont, then maybe like you said the chains let loose or the tensioners failed. You may have still broken the t-belt as a result of that but simply a broken t-belt by itself won't cause grinding.

Let us know what the issue turns out to be.

 

[KyngofPop]

I am having doubts about even wanting to keep this car if this is a sign of what my ownership of it will always be...

Try not to blame the car, remember you did a motor swap. Sounds like a definite timing issue with the way you describe the sound, can't be too hard to fix.

 

[vortex2450]

Issue found



someone wanna tell me what's wrong with this picture???? :|

The grinding was the starter skipping teeth across the fly wheel because the engine jammed up when the bolt holding the tensioner snapped and the belt jammed up everything....

How in the **** am I going to handle this???

-Josh

 

[SHOspazz92]

Jesus