Is the B200E an interference engine?

Jan 18th, 2004, 17:18

http://pic7.picturetrail.com/VOL188/...8/23744414.jpg

I posted a question on this forum a while ago asking if the B200E in my 740 was an "interference" type engine, ie. in the event of a timing belt break do the valves hit the pistons.
Informed opinion at the time was that all the B2** serias engines were non-interference.

Having just bought an `88 GL for spares with this engine I set about proving this one way or the other.

What I did was to remove the timing belt, valve cover and spark plugs.
With the crank at a few degrees before TDC the cam was turned to put the inlet valve on No 1 cylinder to full lift.
Then the crank was turned GENTLY BY HAND towards TDC, but before it got there the piston made very solid contact with the valve.
This was repeated for the exhaust valve with the same result.

Conclusion:- The B200E (and almost certainly the B230E) IS an interference engine and WILL suffer damage if the valve timing is lost.

Pehaps it would be useful for someone to try this next time they have a B230F or similar with the belt off, and post the result.

Is your belt overdue a change?????

I will post this on the 300 and 200 series forums also.

Colin.

Jan 18th, 2004, 17:18	#1
Colin Shepherd Guest Location:	Is the B200E an interference engine? http://pic7.picturetrail.com/VOL188/...8/23744414.jpg I posted a question on this forum a while ago asking if the B200E in my 740 was an "interference" type engine, ie. in the event of a timing belt break do the valves hit the pistons. Informed opinion at the time was that all the B2** serias engines were non-interference. Having just bought an `88 GL for spares with this engine I set about proving this one way or the other. What I did was to remove the timing belt, valve cover and spark plugs. With the crank at a few degrees before TDC the cam was turned to put the inlet valve on No 1 cylinder to full lift. Then the crank was turned GENTLY BY HAND towards TDC, but before it got there the piston made very solid contact with the valve. This was repeated for the exhaust valve with the same result. Conclusion:- The B200E (and almost certainly the B230E) IS an interference engine and WILL suffer damage if the valve timing is lost. Pehaps it would be useful for someone to try this next time they have a B230F or similar with the belt off, and post the result. Is your belt overdue a change????? I will post this on the 300 and 200 series forums also. Colin.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)