My old pushrod tube "O" rings were very loose fitting on the head size (red) the block side were tight. Picked up a new set from the Bird and the fit the same, loose at the head end. When I tried to install them the ring would pull out and curl under the lip. Why? I have the old set, should I try the black ones on top too. '70 1.7 now 2056
I you have early pushrod tubes and later heads, this'll be a problem. Early heads took a smaller OD on the outer end. Different seals, too. HTH, The Cap'n
yep, capn is right. The early 1.7 had 1mm smaller P/R tubes and the bores in the heads are also diferent. The case is the same however..
You can bore the heads for larger tubes and solve the issue, else you'll have to have the correct seals which are NLA as far as I know.. I'd use the old seals and seal them up with my teflon sealant..
If you have alunimum push rod tubes, they are probably no longer any good.
I had push rod tubes in my 1776 VW engine. From what I was told happened to mine, after time of heating and cooling, they eventually expand and dont hold the seals properly anymore. Which was why mine were leaking so bad.
But then again, who said VW mechanics knew what they were talking about.
What is a good Teflon sealant, does it come in a tube?
Speaking of the seals and Pelican... I just got one of their gasket sets and there are two different seals, a set of green ones for one side and a set of black for the small end. I also have a complete set of the red ones I got last month from Pelican.
Jake says in his video that the green ones are the best . Any advice on what I have? Will the teflon sealant override any faults with the seals?
Thanks all,
Peter
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