What happened (symptoms) that your mechanic needed to look and see if the key in the keyway was broke?

 

the proper way to install the crank pulley requires a large torque wrench and a dial gage. you torque the NEW bolt to a specified torque then 90* more. the flywheel must be locked to prevent the crank from moving . if your mechanic isnt familiar with the proper procedure he shouldnt be messing with your car. if he is using an impact wrench you are inviting disaster. think what will happen when the pulley shears off the end of the crank at 100mph+ at the track. not a pretty sight

 

What do you mean not able to be replicated again? If someone blows an engine they have 2 choices 1) replace it with another hand assembled engine or 2) have it rebuilt which is most likely completed by a single individual.

 

2) You forgot to mention that engines are usually rebuilt by a guy that could care less about putting the proper high quality replacement parts, following proper procedures(if they even know them) and take no pride in what they build.

I have several friends(and myself included) that have had various make/model engines "rebuilt" by different local machine and performance shops and all have had cheap new parts(ie cast orhyper u pistons instead of forged) installed when paying for good stuff, old parts(nuts bolts gaskets) re-used when they are clearly one time use and in my case an engine that was bored .040 over and not hot tanked(but paid for it) and had metal shavings clog up oil passages which dropped pressure and blew motor after 50 miles. I found one guy that was building race engines only that re-built my "re-build" engine and he said it looked like it had 100,000 miles and was the worst rebuild he had ever seen. He gave me a folder with all the work he did and all of the specs of EVERYTHING down to the thousandth of an inch so I could give the paperwork to a (reputable)builder and they could replicate it without needing my engine. Shortly after building my engine his place was bought out and shut down.

 

sorry to see that happened. 100% of the time the keyway goes, its bad install. If he put it on with a impact gun without proper torque, that would definately cause the bolt to back out and sheer the keyway. I have seen 7-9 of these before, with the same results. I have yet to see a "weak" keyway before. Like posted above, follow the correct install procedure and you won't have any problems.

Torque properly and add that extra 90 degrees to lock it down. They are stretch bolts, one time use only!

hopefully you can just replace the keyway and the crack is ok!

wishing you the best, if you need anything let me know!

 

I have to give you that point. Reminds me of a friend that had his Supra motor rebuilt only to have issues and had to have it rebuilt a second time.

That being said I am fortunate enough to know a couple of shops that care about the work they do, have the knowledge, and will put in the time, effort, and parts to do it right.

Still even if you know a shop that will do it right no one wants to spend the money to rebuild an engine due to an issue. Not a fun way to spend money.

 

Overall even tho i experienced my 185mm crank pulley being installed i dnt regret it and i would do it again the results are amazingggggggggggggggg. after i get my keyway fixed i will be getting the Eurocharged 185mm crank pulley installed the again but the proper way.

 

Always glad to hear that. I love having my 185. Have had it for over two years.

 

I'm trying to learn here. Could you elaborate a little more about what is being done to "fix the keyway".

 

From what the dealership is telling me is that the keyway is a small half moon shape key that slides into the front of the crank in which the top part goes into the pulley. And what happened was since my machanic didnt torque the pulley properly it sheered of the top of the moon shaped keyway. so now the dealer has to go in and get the rest of the keyway out and put the new one in

 

correct, which is a hell of a lot of work and hours to do. Hopefully nothing else was damaged like the crank.

 

guys, just for the sake of clarity..... the keyway is the groove in the the shaft that the KEY(half moon piece) fits in.... there is a notch in the crank shaft that the key fits into and your crank pulley has a groove cut in it that the key slides into...this is what keeps the pulley from spinning on the crank shaft...the crank bolt holds the pulley on the end of the crank shaft....


If the key has sheared then you may get by with cleaning up the surfaces and replacing the key....

If the keyway was damaged they would have to recut it or replace the crankshaft and/or pulley....

 

But you also need some force from the bolt to push on the hub of the pulley. The key could never hold that much force by itself, if the crankshaft is slightly longer than the pulley hub (because the tolerances are not checked and matched at assy.) no matter how tight you go on the crank bolt the key will break.

I would install the pulley but only tourqe the bolt a little, remove the bolt and see if you need to shim behind the pulley hub.

My $.02.

 

Agreed... that is why you tighten that bolt like a sum beetch...