Topic: cylinder head nut covers

[lucky]

There are nut covers that fit in the holes to keep oil from leaking out of the cylinder head.
But if the cam towers are bolted down on top of those caps how can the oil possibly get out even if the plug is not sealing perfectly?

The six holes shown in the (borrowed) photo below.

[Terry in Australia]

The cam towers are bolted down on the head mate, but oil is fed up through them at high pressure via the oil jets that are pressed into the head in very close proximity to the seals/pucks/nut covers. if your seals aren't er, sealing very well, some of that hot thin oil will leak past them. Cheers, Terry.

[lucky]

Thanks Terry!!

[MCRider]

Whether its from the high pressure orifices (which should be sealed with ORings of their own) or simply a matter of low pressure oil wicking its way under the towers, believe me (us) they do and will leak.

[Terry in Australia]

Thanks Terry!!

No worries mate, and I'm fascinated by that head, is it a late K0 or early K1? My K0 heads have the exhaust valve guides with no seals like yours, but the oil jets are cast in (actually, they're just a drilling in the casting) whereas yours look like the pressed in steel jets on my K1 head. Have you had a little port work done as well? Very nice! Cheers, Terry.

[lucky]

Thanks Terry!!

No worries mate, and I'm fascinated by that head, is it a late K0 or early K1? My K0 heads have the exhaust valve guides with no seals like yours, but the oil jets are cast in (actually, they're just a drilling in the casting) whereas yours look like the pressed in steel jets on my K1 head. Have you had a little port work done as well? Very nice! Cheers, Terry.

In my post it says,"borrowed"photo.

I was asking the question about a 1978 cylinder head,not the one in the photo.
I just showed the photo to let the forum members know HWICH holes I was talking about.

My question about the camshaft position and lobes got kicked off the high performance section and that disappointed me because
I thought the experts could surely answer my question.

[Terry in Australia]

Oh, OK mate, I see, no problem. Watch those "High Performance" guys, unless you paid 500 bucks for a set of spark plugs, or you've got a billet clutch cable, they won't talk to ya!

[MCRider]

That's my head!!  Took a minute, but that's my shop!

 I bought it off eBay. Can't remember the K series.  It has been ported by Ron Scrimsa at Racing Engine Service in TX, with a 5 angle fine line valve job, stainless Manley valves (reused from Phardrus I) I had the no seal guides put in. I may regret it for smoking, but i wanted the low friction. Vitron seals on the intake. APE springs, Ti retainers.

They are the non-removable oil orifices, though.

[Bill/BentON Racing]

MCRider,did you get it from dcr0071,we sold one like it on ebay for less than expected!
You riding yet? Lucky,you gotta eta on bike running?Sounds interesting! Good Luck,Bill

[MCRider]

MCRider,did you get it from dcr0071,we sold one like it on ebay for less than expected!
You riding yet? Lucky,you gotta eta on bike running?Sounds interesting! Good Luck,Bill

I could just skirt the question as it uncovers the embarrassment of how long my project is taking. But what the heck?   

I bought that head in Spring 2000, The Phaedrus I head, which had been ported by the now defunct Yoshimurra East (NJ), was just too wasted to reuse. Every hole had been helicoiled and it leaked profusely from the hold down stud holes.  I had the work done on the new to me head in Fall 2000. Then wrapped it up and it sat on the shelf until I got back on the project in Summer 2008. It is now instaled and in the frame. We missed the Memorial Day/July 4th/ Labor Day deadlines. Now shooting for Thanksgiving.   

[MRieck]

That's my head!!  Took a minute, but that's my shop!

 I bought it off eBay. Can't remember the K series.  It has been ported by Ron Scrimsa at Racing Engine Service in TX, with a 5 angle fine line valve job, stainless Manley valves (reused from Phardrus I) I had the no seal guides put in. I may regret it for smoking, but i wanted the low friction. Vitron seals on the intake. APE springs, Ti retainers.

They are the non-removable oil orifices, though.

That is very tru especially if they weren't installed properly. I went through a "reconditioned" sandcast head for a board member from Canada secondary to excessive oil consumption. The exhaust guides were NOS "old" style that he spent about 1.5 years rounding up. They were not installed correctly and the exhaust ports were so full of burnt oil residue it took 30 minutes just to bead blast the exhaust ports clean. There were some other issues like the top of the head being bowed about .010. Anyway the problems were solved...the exhaust guides were replaced with modern types using a seal. No problems after that.
  Also...the height of the old style guides can limit cam selection.

[Sam Green Racing]

Thanks Terry!!

No worries mate, and I'm fascinated by that head, is it a late K0 or early K1? My K0 heads have the exhaust valve guides with no seals like yours, but the oil jets are cast in (actually, they're just a drilling in the casting) whereas yours look like the pressed in steel jets on my K1 head. Have you had a little port work done as well? Very nice! Cheers, Terry.

In my post it says,"borrowed"photo.

I was asking the question about a 1978 cylinder head,not the one in the photo.
I just showed the photo to let the forum members know HWICH holes I was talking about.

My question about the camshaft position and lobes got kicked off the high performance section and that disappointed me because
I thought the experts could surely answer my question.

You are very (LUCKY) this one didn't get moved as well (I missed it). There are more experts on the main tech forum than on here that can answer your questions, that was the reason I moved it.
Most of the experts on here frequent the tech forum but not all of them on there come in here.
Some questions get asked on here from time to time and don't get an answer for days, moving them to the main tech forum results in them getting answered in minutes (sometines).
Anyway we don't kick them off, we just move them gently.

Regards Sam.

[MCRider]

That's my head!!  Took a minute, but that's my shop!

 I bought it off eBay. Can't remember the K series.  It has been ported by Ron Scrimsa at Racing Engine Service in TX, with a 5 angle fine line valve job, stainless Manley valves (reused from Phardrus I) I had the no seal guides put in. I may regret it for smoking, but i wanted the low friction. Vitron seals on the intake. APE springs, Ti retainers.

They are the non-removable oil orifices, though.

That is very tru especially if they weren't installed properly. I went through a "reconditioned" sandcast head for a board member from Canada secondary to excessive oil consumption. The exhaust guides were NOS "old" style that he spent about 1.5 years rounding up. They were not installed correctly and the exhaust ports were so full of burnt oil residue it took 30 minutes just to bead blast the exhaust ports clean. There were some other issues like the top of the head being bowed about .010. Anyway the problems were solved...the exhaust guides were replaced with modern types using a seal. No problems after that.
  Also...the height of the old style guides can limit cam selection.

Thanks Mike. I can only hope they were installed correctly. RES was a referral to me (long before I knew of you) by a friend in TX who had built a CR750 replica. It was clocked at 150mph at Daytona and he was pretty happy with the machine work. So I used RES. RES has extensive experience with 4cyl MC engines.

http://www.racingenginesvc.com/.

At the time (2000) the guides were available from Honda just by asking. 

First priority now is to get the s--tbox running. Anything that needs fixing will come later.     I'll only be using a mild cam, but good tip to be careful if I go with a higher lift.

[MRieck]

That's my head!!  Took a minute, but that's my shop!

 I bought it off eBay. Can't remember the K series.  It has been ported by Ron Scrimsa at Racing Engine Service in TX, with a 5 angle fine line valve job, stainless Manley valves (reused from Phardrus I) I had the no seal guides put in. I may regret it for smoking, but i wanted the low friction. Vitron seals on the intake. APE springs, Ti retainers.

They are the non-removable oil orifices, though.

That is very tru especially if they weren't installed properly. I went through a "reconditioned" sandcast head for a board member from Canada secondary to excessive oil consumption. The exhaust guides were NOS "old" style that he spent about 1.5 years rounding up. They were not installed correctly and the exhaust ports were so full of burnt oil residue it took 30 minutes just to bead blast the exhaust ports clean. There were some other issues like the top of the head being bowed about .010. Anyway the problems were solved...the exhaust guides were replaced with modern types using a seal. No problems after that.
  Also...the height of the old style guides can limit cam selection.

Thanks Mike. I can only hope they were installed correctly. RES was a referral to me (long before I knew of you) by a friend in TX who had built a CR750 replica. It was clocked at 150mph at Daytona and he was pretty happy with the machine work. So I used RES. RES has extensive experience with 4cyl MC engines.

http://www.racingenginesvc.com/.

At the time (2000) the guides were available from Honda just by asking. 

First priority now is to get the s--tbox running. Anything that needs fixing will come later.     I'll only be using a mild cam, but good tip to be careful if I go with a higher lift.

RES has been around for quite a while that is for sure. The problem with installing those guides is the driver has to sit on the sides off the taper as not to damage the nose of the guide. The head that I repaired had the top of the guide damaged as someone used a regular guide drift and ruined the nose of the guides.

[MCRider]

That makes sense. You can see i suppose in the picture the tops of the guides appear undamaged. And my memory of them is that the top edge was very crisp. I think I'm all right.

[MRieck]

That makes sense. You can see i suppose in the picture the tops of the guides appear undamaged. And my memory of them is that the top edge was very crisp. I think I'm all right.

You should be.

[lucky]

That's my head!!  Took a minute, but that's my shop!

 I bought it off eBay. Can't remember the K series.  It has been ported by Ron Scrimsa at Racing Engine Service in TX, with a 5 angle fine line valve job, stainless Manley valves (reused from Phardrus I) I had the no seal guides put in. I may regret it for smoking, but i wanted the low friction. Vitron seals on the intake. APE springs, Ti retainers.

They are the non-removable oil orifices, though.

Thanks MCRIDER for providing the information. I am sorry and I should have  taken my own photo. I apologize. Sincerely.

[lucky]

Thanks Terry!!

No worries mate, and I'm fascinated by that head, is it a late K0 or early K1? My K0 heads have the exhaust valve guides with no seals like yours, but the oil jets are cast in (actually, they're just a drilling in the casting) whereas yours look like the pressed in steel jets on my K1 head. Have you had a little port work done as well? Very nice! Cheers, Terry.

In my post it says,"borrowed"photo.

I was asking the question about a 1978 cylinder head,not the one in the photo.
I just showed the photo to let the forum members know HWICH holes I was talking about.

My question about the camshaft position and lobes got kicked off the high performance section and that disappointed me because
I thought the experts could surely answer my question.

You are very (LUCKY) this one didn't get moved as well (I missed it). There are more experts on the main tech forum than on here that can answer your questions, that was the reason I moved it.
Most of the experts on here frequent the tech forum but not all of them on there come in here.
Some questions get asked on here from time to time and don't get an answer for days, moving them to the main tech forum results in them getting answered in minutes (sometines).
Anyway we don't kick them off, we just move them gently.

Regards Sam.

OK...I understand now Thanks for taking care of things. I appreciate it.

[MCRider]

Lucky: Hey don't apologize man, I'm not getting on you!  Copy as many of my pictures as you want, spread em around. Its all in fun.

Hope i can help sometime!

Ron

[Sam Green Racing]

I think it was aimed at me Ron, seems Lucky might be new to forums and hasn't figured where the post boost thread is yet. Sorry for the need to keep having a go at you Lucky but you really do need to start posting in the right sections. Your oil line for sale should be in the classified section at the top of this forum, that's providing it is a hipo or racing oil line. here's a link. http://forums.sohc4.net/index.php?topic=82842.msg932320#msg932320

Sam.

[Terry in Australia]

Ooops, looks like Lucky has incurred the wrath of the hall monitors, er, I mean mods!

[Sam Green Racing]