Timing on B200E running LPG

31satara · Apr 17th, 2010, 08:28

I've just done a head job on my B200E. I want to check and adjust the timing but am not sure of what it should be. Volvo handbook and Haynes differ; 5 or 10 BTDC. I seem to remember reading that when using LPG the timing should be slightly advanced - is this the case and can anyone suggest what I should set it to?

classicswede · Apr 17th, 2010, 17:45

You need to keep the timing as per book in this case. Provided the head as not had a huge amount taken off that will be fine. If there has been a big skim then you might find it will pink while running on petrol.

You are best not to advance the timing as 1 it will pink on petrol and 2 a backfire is more likely with these engines.

31satara · Apr 17th, 2010, 20:34

Thanks for the info. I didn't change the timing when I converted to LPG and it seemed fine, but had since seen it mentioned a few times in general comments about using LPG. So should I go with the Volvo handbook at 5 degrees BTDC?
The head wasn't skimmed - the timing belt somehow slipped. I had to replace the exhaust valves. I also need to adjust the valve clearances, two are a bit tight.

classicswede · Apr 18th, 2010, 00:20

What happened to the exhaust valves? The B200E should not damage the valves if the belt failes or moves.

5 degrees BTDC sounds about right to me.

31satara · Apr 18th, 2010, 06:40

All four valves were bent. I'd looked on here to see if the B200E is an interference engine - opinion seemed divided, however mine is for sure!

Thanks for your help, I'll try it at 5 BTDC.

Apr 17th, 2010, 08:28	#1
31satara Junior Member Last Online: Dec 29th, 2012 10:54 Join Date: Oct 2006 Location: Derbyshire	Timing on B200E running LPG I've just done a head job on my B200E. I want to check and adjust the timing but am not sure of what it should be. Volvo handbook and Haynes differ; 5 or 10 BTDC. I seem to remember reading that when using LPG the timing should be slightly advanced - is this the case and can anyone suggest what I should set it to?

Apr 17th, 2010, 17:45	#2
classicswede Trader Volvo in my veins Last Online: Yesterday 22:24 Join Date: Dec 2004 Location: Anglesey	You need to keep the timing as per book in this case. Provided the head as not had a huge amount taken off that will be fine. If there has been a big skim then you might find it will pink while running on petrol. You are best not to advance the timing as 1 it will pink on petrol and 2 a backfire is more likely with these engines. __________________ http://www.classicswede.org www.classicswede.co.uk

Apr 18th, 2010, 00:20	#4
classicswede Trader Volvo in my veins Last Online: Yesterday 22:24 Join Date: Dec 2004 Location: Anglesey	What happened to the exhaust valves? The B200E should not damage the valves if the belt failes or moves. 5 degrees BTDC sounds about right to me. __________________ http://www.classicswede.org www.classicswede.co.uk

Apr 17th, 2010, 20:34	#3
31satara Junior Member Last Online: Dec 29th, 2012 10:54 Join Date: Oct 2006 Location: Derbyshire	Thanks for the info. I didn't change the timing when I converted to LPG and it seemed fine, but had since seen it mentioned a few times in general comments about using LPG. So should I go with the Volvo handbook at 5 degrees BTDC? The head wasn't skimmed - the timing belt somehow slipped. I had to replace the exhaust valves. I also need to adjust the valve clearances, two are a bit tight.

Apr 18th, 2010, 06:40	#5
31satara Junior Member Last Online: Dec 29th, 2012 10:54 Join Date: Oct 2006 Location: Derbyshire	All four valves were bent. I'd looked on here to see if the B200E is an interference engine - opinion seemed divided, however mine is for sure! Thanks for your help, I'll try it at 5 BTDC.

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