I've decided to replace my push rod tubes and seals - seals because they are leaking and tubes because they are rusty so I thought it easier to replace them rather than spend hours cleaning and repainting the old ones are there any differences in quality of push rod tubes ? ....which ones should I go for I'm a bit nervous about stripping too much from the engine as it was running really well .......3 years ago .....but I suppose to change the tubes I'm going to have to take the heads off. If I remove the heads I guess it will no doubt disturb the barrel gaskets to the block I have an Elring gasket set and have noticed there are barrel gaskets with it - but are there gaskets between head and barrels? I dont really want to remove pistons from the barrels ...in case I cant get them back in (I suppose I could borrow a ring compressor and I'm being a wuss ) .....but can I leave the pisons in the barrles and remove the lot from the con rods to remake the barrel gasket? I was also going to use blue Hylomar as the gaskets look a bit thin - is this right any advice as always appreciated
The pushrods and tubes slide up and out of the head without removing it. That's how it is on a 2 ltr anyway. I replaced mine, after digging out four ton of silicone my dad had put there last time. I now know why that was there. The seals don't seem to do their job very well.
Type 1 heads you just need to pull the head off 15 mm or so so you can get the tubes in , Can't remove barrels and pistons together , just pull them off and deglaze new rings if going that far .....
I replaced a leaking tube with a plastic extendable one 60k ago. Saved removing the head. There remains a leak so small as to be unimportant.
The tubes I bought from GSF were fine. Type 1, just take the heads off. Leave the barrels & pistons alone, if they're ok. There are no gaskets between the heads & cylinders on a type 1. You'll need an accurate, low-ish value (up to say 45 lb/ft) torque wrench to do everything up again. Straightforward job, no need to panic .
