push rod tube seals to head

had the head on and off several times today and just cant seem to get the seals to sit right in the head .....the ones at the block end are sitting nicely

every time I think I've got it, the last little tweek up with the torque wrench seems to pop them through at an angle I was tempted to leave it as the worst one still looked like it was sealing .....but when I put the rockers back on I noticed the push rod is touching the tube

so the head will be off again tomorrow, and the next day, and the day after until I get them right

any one got any top tips for getting them to seal correctly ???

 

did you stretch out the concertina on the tubes? Not too much, but it aids the sealing!!

You might just need to tweak the mouth of the tube with it in situ.. as the tubes kinda sit where they sit!! If you have a close look at the case the tubes are at an angle to the case... they don't come out at right angles

 

thanks mate

yes, stretched the tubes out a bit (new stainless ones - they were hard to stretch!!)

I did notice the tubes came off at an angle ....I guess tomorrow when the head comes off I will try to tweek the ends so they come to the head squarely ......I think that is the problem

I did turn a few of the tubes with the head loosened and they sat better ....but the seam wasnt at the top of the tubes like the manual said after rotating them....does this really matter?

 

that's just a safety thing incase a seam has a pinhole in it... tbh I've never worried about it, as modern welding is very consistent!!

 

type 1 engine?

 

yep 1600

 

Can't think why you're having probs. Seals seated properly on the tube ends (ie pushed right on)?

 

You shouldn't have stretched new tubes. I think you made them too long. If you stretch old ones, just a tiny bit (1mm?) is plenty or the seals squish out. When you warm it up the seals may pop right out. The dimension is in Haynes.

 

yes, seals fully on end

yes, I stretched them, Haynes said minimum length 191mm so I went to 195mm

 

That is most definately your problem then. FAR too long...

 

doh!!!

any idea how I can squeeze them back down

 

They probably have squeezed back down!!

It's what they do when you put the heads on and bolt them up

 

...or try the vice and a measuring stick?

 

All sorted now

just needed a bit of a tweek .....I did try a bit of threaded bar with nuts ....not too successful .....then a socket one end...3/4 drive extension the other, and a litte persuasion ...not successful either as they were springy

only took another 3 attempts ....after cleaning off all the blue hylomar from yesterday and deciding not to use it again

just needed to angle the ends slightly and it did the trick ....and some little tweeks as I tightened the head

 

Ill be interested to see how those push rod tubes and rocker covers perform over time dude

 

so will I

just wondering what grade stainless they are ?

the rocker cover seems good......the bail arm was a very tight squeeze to get on!!



makes me wish I'd spent more time polishing up the head .....at least most of it will be hidden

 

you forgot to polish and detail the cylinder head part numbers

 

.....damn it!!!

could have polished that rocker assembly while I was there too

 

stuff like this is normally 304 grade stainless

 

Very tidy job

Is your baffle plate properly seated - looks a bit odd to me, but I could be wrong?