Is the BP motor an interference motor?

rob323 · Postby **rob323** » Wed Aug 12, 2009 7:46 am

I know (from experience unfortunately) that the B6 can lose a timing belt or break the end of the crank without smashing valves, but now that I have an NA8 in my driveway, are the BP motors the same, or are they an interference engine?

Cheers,
Rob.

JBT · Postby **JBT** » Wed Aug 12, 2009 8:27 am

1600 and 1800 are both non-interference.

rob323 · Postby **rob323** » Thu Aug 13, 2009 8:37 am

Thank you, that's what I thought.

From an Ebay add for a timing belt kit:

It is VITAL to perform this service every 100,000k's on your mx5. If the belt breaks you could do signigicant damage to your engine cylinder head.

JBT · Postby **JBT** » Thu Aug 13, 2009 9:48 am

True for some cars but not the MX-5. That's Flea Bay for you.

greenMachine · Postby **greenMachine** » Thu Aug 13, 2009 2:39 pm

JBT wrote:1600 and 1800 are both non-interference.

That is for a stock engine of course.

Long duration cams, shaving the head, decking the block will change that. Then again, those sort of mods would probably entail a new belt also, and what is the betting that on an engine like that there is a teardown inside the next 100 000 kms too ...

:mrgreen: