Timing belt tensioner fail... - Defender Source
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  #1  
Old July 11th, 2016, 11:51 AM
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Craig Spaeth
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Timing belt tensioner fail...

So a short while ago I had a shop do my timing belt on my 300Tdi. They said something about the timing belt slipping. Well it turns out they actually assembled the tensioner wrong. It came loose. The new timing belt came off and things went crunch.

The shop said they put a camera down in the top end and saw no damage. They replaced all of the pushrods and a few of the lifters and put another timing belt on. I have read a ton online and it sounds like deeper engine damage is rare, but I wanted to check here and see what say you.

When a timing belt breaks/comes off at 60mph climbing a hill what are the chances of deeper engine damage? It seems to be running fine now. I am just trying to stop doubting what has been done. Even after putting the timing belt back on they messed up several small details that really makes me wonder.

Thanks in advance for any info.
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  #2  
Old July 11th, 2016, 11:57 AM
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Matthew
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There is definitely a chance of a bent connecting rod if a Valve got in the way of a piston Inna serious way


Butnitnwould be down on power and making a racket
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Old July 11th, 2016, 11:59 AM
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Quote:
Originally Posted by spaeth View Post
..... at 60mph climbing a hill.
I have no experience in this matter.
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  #4  
Old July 11th, 2016, 12:09 PM
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John B.
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I've never heard of a rod bending. Bent rods I've seen are for hydrolocking. The pushrods are purposely weak to take the damage.

The bigger worry is that they used the right parts and did the assembly correctly.
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Old July 11th, 2016, 12:46 PM
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Quote:
Originally Posted by Red90 View Post
I've never heard of a rod bending. Bent rods I've seen are for hydrolocking. The pushrods are purposely weak to take the damage.

The bigger worry is that they used the right parts and did the assembly correctly.
+2 on this.

I have seen one where I had to pull the push rods with a slide hammer because a claw hammer couldn't get them out, ie completely pretzeled up. I put the truck back together and its been on the road for three years now. Like John says, if the shop screwed the pooch the first time with a routine maint item, my worry would be on the workmanship of the repair.
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  #6  
Old July 11th, 2016, 04:33 PM
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Bill Adams
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How the heck do you assemble the tensioner wrong? I mean, really! That's a talent for sure!
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  #7  
Old July 11th, 2016, 07:17 PM
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Craig Spaeth
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Believe my I have the same concerns as you guys on the quality of the FIX. It sounds like the internals should be good. I have been thinking about redoing the timing belt and making sure all of that is correct.

I don't know how they messed it up but I only got about 10 miles from the shop when it let go. They then gave me some story about the timing slipping, which made no sense to me and then finally they said that the tensioner was installed wrong and came loose. It was a Rover specialty shop with glowing reviews and fancy Jaguars and Rolls Royces sitting around.

Thanks for the info. This was what I had came up with in searching online but thought I would double check it with you guys here.
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  #8  
Old July 12th, 2016, 08:47 AM
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I've first hand seen a bend rod in a 524td due to a Valve getting sandwiched between the head and the piston at nearly a right angle. Valve face was Imbedded in the dome of the combustion chamber.


These cars had forged cranks but standard rods
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