dipstick keeps blowing out

[Yolandi2]

hi guys, bit of history first,

my head gasket blew a while ago and cracked a ring at the same time, so new rings all round, bores honed, head skimmed and rebuilt etc.

runs well but breathes a lot of oil for some reason now and when driven hard it blows the dipstick out, and subsequently a lot of oil as well

I've taken the cam cover off and left the breather gauze end in petrol for a few hours and a fair bit of sludge was flushed out of it, after all the petrol dried off I blew through it and there wasn't any resistance through the gauze but it is still popping the dipstick out,

what else could be causing this?

[mark1gls]

Not had this problem but it does sound like a blocked breather, it might be worth checking the breather hoses after the rocker cover and possible clean out the metal gauze again, I block up the hole and soak mine in GUNK at least overnight or best all day then wash is out and leave to dry.

Other causes could be head gasket no sealed properly, have you done a compression test on all 4 cylinders?

[Yolandi2]

I did a compression test before I did all the head gasket work and has readings of 160 on cly's 1-3 and 115 on cyl 4 (the snapped ring one)
upon further investigation cyl 3 had blown between the combustion chamber and the water channel,

after all repairs the compression was 150 across all cylinders before the ring bed-in period

[mark1gls]

Maybe try a new dipstick tube incase the old one is worn and the dipstick is loose..... check it's the right type as there is 2 types of dip sticks.

https://www.ebay.co.uk/itm/Mk1-Mk2-golf ... Sw4CFYwAGs

As I said not sure on a cause/cure as I've not had this problem...
Try a search on google for Mk1 golfs with the same problem??

[Yolandi2]

ok ive ordered a new tube, so cheap might as well try it,

the other cause ive thought of, ive got an after market panel air filter on my carb with a simple 90degree plastic plumbing fitting for the breather on it, maybe the fitting it too narrow and is restricting it that way?

[mark1gls]

Do you have a picture of what is fitted?

[Yolandi2]

cant attach photos because the files are too big so they're here on dropbox

https://www.dropbox.com/sh/rpuf9k19772t ... s9Spa?dl=0

[mark1gls]

Pipe looks similar size to the original hose, can you blow down the hose ok and it’s clear of any blockages?

When changing the plastic dip stick tube holder go carful as when they get old they tend to break up into little bits when trying to remove them and you don’t want any bits dropping into the sump.

[Yolandi2]

I can confirm that the hose is completely clear apart from the usual oil lining the insides of it

[james butler]

is the dipstick housing cracked?
maybe its not allowing the dipstick to grip properly in its housing?

[Yolandi2]

all sorted now guys, it was the dipstick tube after all, the old tube you could pull the stick out with one finger now it actually requires force to pull it out and push it back in lol I love a cheap fix

thanks again

[mark1gls]

Glad it’s sorted and a simple cheap fix and you did not pull the engine apart trying to find a fault....

[Nuckleduster]

Hi all, The best way to clean out the gauze in the rocker is to soak it in petrol and set light to it--marvelous how much crap comes out after the flames are gone. Found this out when I had a slipping clutch caused by oil getting past crankshaft seal and getting on clutch. Burnt out the gauze filter and clutch slip in 3-4th gear gone. Ran car for another 40k without any further problems. Sometimes urban mechanic fixes work best--only thing was the cover needed repainting.
Gerry