90 Q45 on Ebay

[breaksr]

http://cgi.ebay.com/ebaymotors...QrdZ1

I understand the climate control problem (display needs Jerry Tucker electronics replaced) but what the heck is he talking about in reference to the engine vibration? Sounds like transmission and motor mounts or driveshaft issues.

[elwesso]

What hes talking about (if its correct) is the woodruff key going into the crankshaft...

Basically what this thing does is prevents the crank pulley from slipping on the crankshaft... On the crank pulley there is a little notch where this key slides into. They key is a half moon shape and sits in a groove in the crank...

Sounds to me like someone took the crank pulley off (either to replace the guides) and didnt get it on tight enough and the accessories caused it to shear it off... The problem is that the motor is probably going to need to be retimed, as well as the woodruff key replaced... I dont understand why they didnt replace it, if they know thats what the problem is.... IF its sheared off, all youd have to do is take a punch and tap the sheared piece out (carefully not dropping it into hte oil pan) and put in a new one.... ANOTHER problem i see with this, is if they didnt put the crank pulley back on it could mean its been starved for oil... The sprokets for the cams and oil pump are held in place by the force of the torque by the crank pullley. If it was too loose, that could mean the cams are off as well as the oil pressure being reduced...

There should never be enough force to shear the key off!!!! unless something else is off...

another cause could be the exhaust... If its a california model there was a TSB on the exhaust causing a vibration...

the way I see it, its not really that big of a deal, because you should always take the front cover off of a 90-93 to see if the guides have been done.

[Jesda]

At $1300 its already overpriced.

[Q45tech]

If it isn't driveable or cannot run it is worth $500* delivered to you location.Unless it has a ton of new replacement parts. About 4 years ago we paid $1300 for a Q with a new remanned transmission, new alternator, new compressor, new condenser and all AC lines, new MAF, new rad, new fan [repaired after rearending someone].........shortly thereafter it itslf got rearended.

*What we have been paying for the last 6 years

[lino]

the way I see it, its not really that big of a deal, because you should always take the front cover off of a 90-93 to see if the guides have been done.

How can you tell if the guides have been done?

... The problem is that the motor is probably going to need to be retimed...

How much of a difference can timing make in overall performance?

[elwesso]

How can you tell if the guides have been done?

How much of a difference can timing make in overall performance?

1. If theyre metal!

2. Im talking RETIMING, not adjusting the timing. meaning the cam vs crank timing...

[lino]

1. If theyre metal!

How much time would it take to be able to see that they are indeed metal?

[elwesso]

probably 4-5-6 hours to pull the front cover off.

[lino]

probably 4-5-6 hours to pull the front cover off.

I remember you telling me that before, but I was just making sure in case you discovered some new quick way.

Thank you as usual.

[breaksr]

Very impressive analysis Wes. Thought maybe it was some sort of vibration from drive shaft or transmission (maybe even rubber mounts).

Q45tech - yes I agree with $500 for the car when there not running or in bad shape.