Parts Needed |
|
|
||
| Name | Cost (Oct, 2000) | |
| Mazda Crank Bolt | #630-11-406C | $ 8.98 |
| Mazda Key |
#B630-11-317A | $ 4.11 |
| Mazda Crank Pulley | #B366-11-321A | $ 23.46 |
| Loctite 660 Quick Metal | $ 4.21 | |
| Loctite 243 Thread locker*** | $ 4.99 | |
| Valve Cover Gasket (optional) | ||
| Mazda Crankshaft Seal (Optional) | ||
The Mazda parts came from Trussville Mazda (www.trussvillemazda.com). The prices and part numbers from October 2000 appear above. They are probably 20% higher in 2007.
Loctite 660 was formulated by Loctite for pulley and keyway repair and is harder to find. Mine came from an industrial supply house. McMaster-Carr . You can order from their web page - just enter loctite 660 into their search box. .
*** This page originally specificied Loctite 242, which is the standard "blue" loctite available at auto parts and hardware stores. Loctite 243 is 66%, but still allows the pulley to be removed with hand tools later. Available from McMaster-Carr. Also consider buying some loctite primer to improve ashesion.
| Basically, this repair reassembles the front crankshaft assembly using a new gear, key a and bolt. The assembly strength relies both on the glue holding the gear to the cranknose, and the compressive force of the bolt. | |
 |
 |
| Assembled gear and crank bolt. | Crankshaft damage. An enlarged keyway.. |
 |
 |
| New crankshaft key in worn keyway | Heads on view of the assembly showing gap in keyway |
|
The Loctite 660 is applied to the enlarged keyway and fills the gap after it cures. Depending on the clearance, either Loctite 660 or Loctite 242/243 is applied between the rest of the contact surface between the gear and crankshaft to bond the three parts (gear - key - crankshaft). Finally, Loctite 22 or 243 is used as a threadlocker on the crankshaft bolt. Does it work? It appears so. One user has stated that he was able to run the engine 6 months after the Loctite Fix with the crank bolt removed and only the glue holding the gear on the crankshaft nose. See this link. |
|
Is it Worth it?This depends on how much it costs you, Clearly, a do-it-yourselfer has only the cost of parts and his time at risk. If taken to a shop, the labor is equivalent to a timing belt change, i.e, $300-500.Add parts, and you're looking at $700-800? At that point. it might pay to look at the engine replacement alternative.. |
|
| [Home] - [FAQ] - [Search] - [Sponsors] - [Forums] |
| [Garage] - [Clubs] - [Contact Us] - [Disclosures] - [More...] |
Copyright
©1994-2024, Eunos Communications LLC
|
