A1 head studs

[BC847]

I run the A1 stud kit from Haisley Machine. With the typical bottom tapping and cleaning of the bores, I'm able to clear them with removing a small amount of the valve cover's webbing with no problem.

The 24v timing cover vent used in conjunction with the 1st gen's OEM lifter-valley vent works rather well.

[KTA]

FWIW my truck has no additional breathers. I only have the stock blowby tube by the starter.

[bgilbert]

I run the A1 stud kit from Haisley Machine. With the typical bottom tapping and cleaning of the bores, I'm able to clear them with removing a small amount of the valve cover's webbing with no problem.

Same here .

[stoneagemaxx]

i love how some people react to others statements, it was just a joke i understand the internet is soo hard to tell when others are making a joke but come on i remember when bgilbert pm'ed me his phone # on tdr to help me out w/ timing my motor when i was dead lost, thanks again bill

[seeker1056]

kta - unless I be losin my mind I still have an old pic of your truck with 6 breathers on it from the old site??? one on each valve cover - same pic shows your custom bov, and your over the fender twins - eitherthat or i have you confused with some other cummins genious

Bill - no insults intended - you been called on the mat many times for your remarks - maybe thats just how you are - somewhat caustic

Some people just dont get your tude Bill

so dont write me off just yet - you got a looooong way to go to be sayin wannabe

when and if you ever get around to havin done the R&D on as many different projects and successfully so, I might add, as some of us out here in internet land, then you can say wannabe, to me or anyone else

In the mean time we all be tryin and learnin, and makin mistakes large n small

Joel made the mistake of postin a booboo - he will learn from it

Some admit thier mistakes, other cover them in scathing loud retorts and snide remarks

I dont know about some here - but I am here to learn - not to be crucified for standing up for someone who made a mistake and is learning

what say you mr Bill - what is your purpose here?

As to whats the best ventilation - either a vacumm pump of some sort, or an exhaust vacumm dump aka like drag cars, or a dry sump pump or any other similar evac systems - in any event one must still provide a means of equalizing the crankcase pressure and that requirs a vent - usually mounted on the valve cover

Yes just valve cover breathers with no evac system puke all over the place - how could they not? without positive crnakcase ventilation

relyin on crankcase pressure to ventilate a motor was dumped as useless waaaaaay back in the early sixties

Anyways - this thread has gone way too far and some are right - a pissin match - not somehting conducive to learning or good rapport

mr Bill - I will be a stand up person and offer you my apologies - you have my apologies for any slights I may have made - no excuses

ken

[Richie O]

Not this again.

[KTA]

You have me mistaken possibly with Big Bad Dodge. My truck has no breathers besides the stock hose out the tappet box. You can see a couple of valve covers in this pic and there are no vents.

[SChandler]

For those of us who haven't built motors before, what do you use to bottom tap the head bolt holes? I'm assuming it's not a tap and die set. What is the depth approximately to tap the holes to?

[Ace]

A regular tap can be made into a bottom tap by carefully grinding the tip down to where the threads even up.

[SChandler]

Thanks Ace. I looked up bottom tap on Google, and came up with a few definitions of the three different styles of taps. I didn't realize there were different styles.

Does anybody know what the thread pitch is for the head bolts/studs? On one of the sites I was looking at they had three different pitches for 12mm dia. bottom taps.

[seeker1056]

how do i post a pic into a reply here?
cant figure out the "url" thing at all

Cant I jus tcopy n paste?

[BC847]

A bottoming tap (upper image) compared to a standard tap (lower image) . . .



We want to use a M12x1.75 bottoming tap.

[sdstriper]

A regular tap can be made into a bottom tap by carefully grinding the tip down to where the threads even up.

Finally we get to the "bottom" of this problem... I thought I was the only one too cheap to buy actual bottoming taps. You have to be careful though, they do chip out, I prefer a cut-off wheel myself.

And make sure the hole is clean, or clean as you go...

[SChandler]

Thanks for the info and the tap size. Seeker, to post a photo here you need to first have the image loaded on a site like Photobucket then copy the line that says IMG Code. Paste that into your post and the photo should show up.

[Ace]

...I prefer a cut-off wheel myself...

Yeah, it depends on how much you have to take off. Looks like a good half inch or so from the one in that picture