2004 Toyota Matrix Flywheel

Tiny
LAELLIOT
  • MEMBER
  • 2004 TOYOTA MATRIX
  • 4 CYL
  • AWD
  • AUTOMATIC
  • 80,000 MILES
Hi. In February of this year, I got the engine in my Matrix replaced because I totaled the existing one by having a cracked radiator from an impact. There was slight damage to my front end from the impact, but minimal. The damage was due to an overheated engine from driving it afterwards.

In February of this year, I got the engine replaced with a used engine, with 70,000 miles on it by a mechanic in San Diego. About two weeks ago, my car started making engine noise. I had it examined by someone in Oakland because that is where I am presently located, and it turns out the flywheel is completely cracked.

My question is, is it possible that the damage to the flywheel was done during the crash? Then, is it possible that this was then overlooked by the people who replaced my engine? Could they have used my existing flywheel on the replacement engine with the part being compromised?

Or, is it possible that the flywheel has just warn out in the time that they serviced it in february, to now? Less than 7 months?

Any light you could shed on this would be so helpful because I can't just take it to the mechanic that fixed it in San Diego, but I feel like they might be responsible for the damage.

Thank you so much for you advice.
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Friday, November 13th, 2009 AT 9:42 PM

3 Replies

Tiny
MHPAUTOS
  • EXPERT
Hi there,

It is a fairly standard practice to re use drive plates when fitting a rebuilt engine, normally they are inspected for cracking and the condition of the ring gear teeth, if in doubt they are replaced, now with that said, ring gears must be attached with the bolts at the correct tension, this can be a problem if they are under tightened or over tightened, Drive plates can and do fail for no other reason then fatigue and age, this fatigue can go unseen at even a close inspection with the naked eye, the reason yours has failed could be any of the above conditions, pin pointing the exact cause is neigh on imposable once it has been removed, I hope that this helps.

Mark (mhpautos)
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Friday, November 13th, 2009 AT 11:24 PM
Tiny
LAELLIOT
  • MEMBER
Thank you so much for your insight. So you think there is any indicator of the cause? Or, is it likely that in such a short time that the cause is the bolt tension? Also, do you have any advice on how I should talk to the mechanic who replaced the engine about the repair and his potential responsibility?

Thanks again.
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Saturday, November 14th, 2009 AT 3:32 PM
Tiny
MHPAUTOS
  • EXPERT
HI there,

An experienced eye can pick an old crack from a new one, they will radiate out from the bolt holes and there will be evidence of older cracking and new cracking, older cracks will have a lot of dirt in the crack and new will look shiner, bit hard to describe but it is fairly evident when viewed. The bolt tensions will be an important factor in this problem, you can only ask him if he did do a visual inspection on the drive plate, and if he did adhere to the correct tensions, if he say yes, as I am sure he will, there is no way of telling one way or the other if the drive plate is already removed, so you are at a bit of a bind there, you can only ask the question, but I think that you will find that he will defend his position and you may have no option but to have the plate replaced and get on with things, may be you can take the drive plate away (it is yours to do with as you please) and have it examined, you may have evidence of over tightening around the bolt holes but this may cost more than it is worth to check out.

Mark (mhpautos)
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Saturday, November 14th, 2009 AT 3:58 PM

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