Dip Stick Replacement

[Crazy of Cookham]

Have been getting oil blowing out from Dip stick especially on track. Anyone know of a decent fix. Really need some form of seal at top?

[TuxMan]

i don,t run with the dipstick in i just use a nice tight rubber plug over the end of the tube when i go on track . works fine

[Steve_D]

You need a PCV valve so you are pulling a vacuum on the crank case then the oil will not blow out.

Have I said something like this before?????

Steve

[ditto]

Steve_D said:

You need a PCV valve so you are pulling a vacuum on the crank case then the oil will not blow out.

Have I said something like this before?????

Steve

[Crazy of Cookham]

Thanks Steve time for a search through the old postings. Little bit of engineering ignorance here. Do you get a a pressure build up on the crank side when you have breathers on on rocker covers, assume preesure different in various parts of engine. Would a PCV also reduce the amount of oil being pushed pass the pistons rings and reduce bore wash?

[Stig]

Hate to say it Brian - but I'm surprised Charles hasn't already noticed/fixed this for you???

[bluesatin]

Don't encouraging him to use Charles - he has to do things for me!

[Crazy of Cookham]

Blue please get to the back of the queue

[Steve_D]

Crazy of Cookham said:

Thanks Steve time for a search through the old postings. Little bit of engineering ignorance here. Do you get a a pressure build up on the crank side when you have breathers on on rocker covers, assume pressure different in various parts of engine. Would a PCV also reduce the amount of oil being pushed pass the pistons rings and reduce bore wash?

Do you have the factory breather system with a pipe from each rocker cover to a catch tank and one or two breather pipes from there down the back venting to atmosphere?
If you do then the simple mod is to blank off one of the exits from the catch tank. To the other fit 50mm of hose with a PCV valve stuck in the top. Run a hose from the PCV valve (usually smaller diameter) to the vacuum fitting at the base of your carb.

What you are doing is pulling manifold vacuum on the crank case and sucking the fumes out. The amount of vacuum is a function of throttle position and engine load.

Some very expert engine builders have experimented with this to the next level and claim that in race or drag engines a vacuum pump can show significant HP gains.

At our level the most significant gain is keeping the oil where it belongs.

Steve

[Crazy of Cookham]

Thanks Steve yes have the setup you describe, non standard breathers, uprated ones that bolt to rockers and fit properly. Will add your suggestion to list of rebuild items. Thanks Brian

[Pb3]

If you read around this subject I think you will find quite different views. I found a bit of info on the Burton Power site and they suggest that routing the gasses back into the intake is not good on a performance engine, do we have performance engines?!