5 Posts - Page: 1

Welch plug replacement - cylinder head

Benny
Sydney
Joined: 12-Mar 2020
29 posts
Post #1 | Saturday, 06-Mar 2021 @ 8:34pm
Edited by Benny
Saturday, 06-Mar 2021 @ 9:58pm
Anyone ever ever successfully replaced the welch plug in the rear of the cylinder head, without removing the head? It’s oh so tight with limited space between head and firewall.
 
I’m keen to hear how you went about it. Worst case scenario, the head will have to come off.
 
cheers.
Dundee1000
Fremantle
Joined: 11-Feb 2011
612 posts
Post #2 | Sunday, 07-Mar 2021 @ 2:01pm
I've not done it Benny, but my guess is you could use a G clamp or sash clamp to push the new one in?
d
Oz + JPN
Joined: 23-Apr 2011
1432 posts
Post #3 | Tuesday, 09-Mar 2021 @ 9:34pm
piece of cake on my vb10
removed the extra length
of the drain channel that
hid surface rust easy space.
 
During times of universal deceit, telling the truth becomes a revolutionary act, Big Brother is watching you - George Orwell 'Most Jews do not like to admit it, but our god is Lucifer -- so I wasn't lying -- and we are his chosen people. Lucifer is very much alive.'"  Harold Rosenthal http://www.thetruthseeker.co.uk/?p=24688
Benny
Sydney
Joined: 12-Mar 2020
29 posts
Post #4 | Wednesday, 10-Mar 2021 @ 5:53pm
Edited by Benny
Thursday, 11-Mar 2021 @ 11:55am
Thanks for the replies, head came off. Probably best as upon inspection the valve stem seals were severely worn or missing. Good colour in the combustion chamber indicates good burn.  Closer look at block under the headers, reveals the other Welch plugs were shot. It would have been a matter of time. Only one left to replace to the 50mm plug behind the flywheel.
Benny
Sydney
Joined: 12-Mar 2020
29 posts
Post #5 | Wednesday, 24-Mar 2021 @ 2:21pm
Edited by Benny
Wednesday, 24-Mar 2021 @ 6:05pm
I got carried away (as usual) and did a bit of cosmetic clean up  on the engine. Bit of paint here and there etc. Head was sent out for a std service valves re-lapped , stem seals and a surface skim. I slipped my single Weber setup on for a giggle, This car is  earmarked for a torque oriented big bore A12 (A13) build with all the hard to get performance parts and a bit of custom fab stuff too.
 

 
The factory downdraught carb will be going back on this motor.
5 Posts - Page: 1