QUOTE(Dave_Darling @ Feb 14 2019, 08:30 AM)
Replacing the pushrod tube seals is no more difficult IMHO than doing a valve adjustment. You wind up pulling the tubes halfway out of the heads and letting them dangle by their middle from the hole in the rocker box, giving you easy access to each end.
You have to make sure the area where the tubes go is clean--both ends of it! And lubricate the O-rings with engine oil or a non-hardening paste lubricant. Ignore Elliott when he says to use RTV; FAT Performance (who built his motor) is way too fond of that crap.
--DD
,I would think that if this engine has multiple leaks @ all the places mentioned earlier on engine removal is a better option if you head down the "do it once and do it right" road.
In regards to the best sealer for the pushrod tubes, I can't say enough about Hylamar blue,a top product,stays soft and is resistant to oil fuel etc,been using Loctite,Permatex and many others for years but none of them do such a good all round job as the Hylomar.
Dave made a good comment about the cooling system,seen many overheat and this causes seals to dry out and then the leaks start,a very dirty/oily crankcase will also effect cooling due to poor heat transfer..VW put cast fins on the lower crankcase for a reason.