Air in the fuel line

RobHomewood
Posts: 320
Joined: Tue Oct 22, 2013 8:04 pm

Re: Air in the fuel line

Post by RobHomewood » Thu Jun 18, 2015 1:06 pm

Thanks for that Luli. Are you saying that you need to change the valves and valve guides as well as the valve seats in order to run unleaded without additives?

User avatar
luli
Posts: 646
Joined: Sat Jun 04, 2011 6:49 am
Contact:

Re: Air in the fuel line

Post by luli » Thu Jun 18, 2015 3:52 pm

The original exhaust valves are made of steel (they are magnetic) and would not withstand the high temperature that unleaded fuel heats them to. Therefore they are replaced with stainless steel valves (not magnetic). Those require bronze valve guides.
Rover 10 1946 RHD
Rover 10 1947 LHD
Rover 12 1947 tourer LHD
http://lulisml.wordpress.com/

chris dancey
Posts: 386
Joined: Tue Oct 20, 2009 8:20 pm
Location: Brighton & Paphos, Cyprus

Re: Air in the fuel line

Post by chris dancey » Mon Jun 22, 2015 1:46 pm

I have replaced the valves and the guides on my 10s, exactly as Luli described with bronze guides and hardened valves, makes a big difference to the running. Also check the rocker pads for wear and the rocker shaft, makes tappet adjustment very precise when in good condition. Good luck. Chris
1934 ( 1935 model ) P1 '10' Saloon RD 6160
1935 P1 '10' Saloon ( originally JB 6729 ) now VSJ 156
1946 P2 '14' Sports Saloon KPG 855
1933 MG J2 Cycle Wing Model APB 560
1933 MG J2 Competition Model ALX 124

User avatar
Phil - Nottingham
Posts: 357
Joined: Thu Oct 09, 2008 10:45 am
Location: Nottingham

Re: Air in the fuel line

Post by Phil - Nottingham » Wed Jun 24, 2015 6:15 pm

Done same with our 16 too - much better
P2/P4/P5/P5B/LR's - EXJ 8**/2**8MY & others

jp928
Posts: 68
Joined: Fri Aug 02, 2013 7:44 am

Re: Air in the fuel line

Post by jp928 » Fri Sep 23, 2016 9:55 am

I would be looking at the cast reserve unit body, where the pickup pipe enters the casting. You could test by removing the unit from the tank, blocking all but one inlet/outlet and see if it will hold vacuum. Also do the test with and without the reserve unit attached, if possible. Dont forget that with a pump higher than the tank sucking fuel you are lowering the boiling point and promoting vapour lock.
jp 26 Rover 9

Post Reply