10 replies to this topic

[Gunpilot]

I just aquired a 99, and the previous owner had issues with the car running rough. On inspection, I found the crankshaft key had wobbled out and caused some damage. I have read many forums about this issue.

What is the best source for a replacement pully, harmonic balancer, key, and crankshaft bolt? I already have a new timing sprocket. I plan on trying the locktite repair.

[Chris Windsor]

MazdaSpeed

[Mike Collins]

You're gonna need a new crank REAL soon!

[Dave Lewis]

You're gonna need a new crank REAL soon!

Why?

[Mike Collins]

The locktite fix "MAY" work on a street car but will never hold up on a racecar. Pull the motor, turn it over change the crank and the bearings. That way half the guys behind you wont crash when you put a rod through the side of the block and spew oil all over the track.

[Glenn]

The locktite fix "MAY" work on a street car but will never hold up on a racecar. Pull the motor, turn it over change the crank and the bearings. That way half the guys behind you wont crash when you put a rod through the side of the block and spew oil all over the track.

What Mike said! Call one of the Sponsers here on the forum

[Keith Novak]

Everything except the crankshaft should be readily available from just about anyone who parts out miatas. I have a whole box of that stuff. They're not the parts that usually go when a motor dies. You might try calling someone like Jim Drago on a used crankshaft. As it looks right now, if that pulley lets go at 7000 RPM, it's going to be a lot like firing a canon in your engine compartment.

[MPR22]

The locktite fix "MAY" work on a street car but will never hold up on a racecar. Pull the motor, turn it over change the crank and the bearings. That way half the guys behind you wont crash when you put a rod through the side of the block and spew oil all over the track.

We had an engine with a similarly wallowed keyway. We pulled the crank and the third journal was damaged beyond repair. The owner reported a little noise and a rough running engine, sound familiar? New crank, bearings, pistons,gaskets, oil pump (replace now or regret it later if the journal is damaged) about a grand.

[Gunpilot]

Are the crank and rods in a 99 the same as in all 94-97 1.8's? I know the head and pistons are different.

[Keith Novak]

Are the crank and rods in a 99 the same as in all 94-97 1.8's? I know the head and pistons are different.

Same part numbers for both.

[davew]

I would just buy a complete used motor from one of the reliable sources who participate in the forum. A used crank, pulley parts, new bearings, Gaskets and seals will most likely add up to the same price as a used engine. And be much less labor.

Dave