Engine rebuild story... continued.

[MikeDeY]

Tri Rocket is on track, check if the oil gallery up the back of the motor is clear, the rest of the engine may be fine. Best way to fix that head is to get some one to machine .015" of the head and the cam ladder and bolt it back together, then line bore the cam tunnels again. The silver head will fit the same. Use Harley Twin Cam 96 cube engine paint circa 2007-9. Prep the head well, super clean, and preheat the head to around 35deg C and give it three light coats. Add the second coat a few minutes after the first dries and same again for the third. Presto black head.

I've been thinking about that reboring process all day. Where would I get new camshafts to fit?

 

[MikeDeY]

Oil feed to cam journals has a restrictor at the top of the oil gallery in head, I opened mine out a little (after shimming pump spring) to increase flow as stock it is just sufficient IMHO
Only takes a bit of swarf to block it & stop oil reaching cam.

Are we talking about the bigger hole in the middle of the picture? I removed this screw that was pretty tight. it had a little plastic nub on it that was all crushed up. The plastic fell of when I touched it.

 

[bruce aussie]

I've been thinking about that reboring process all day. Where would I get new camshafts to fit?

If you machine the head and the cam ladder as Lushy said you would get it bored to suit stock cams. The cam would be sitting .015 lower. This would be taken up with shim adjustment. I may be wrong but that's the way I understood Neville's post.

 

[Trirocket3]

Are we talking about the bigger hole in the middle of the picture? I removed this screw that was pretty tight. it had a little plastic nub on it that was all crushed up. The plastic fell of when I touched it.

Yes, plastic bit sounds a likely suspect, rest of engine should have had good oil pressure.
Neville Lush racing supplies new cams NOT regrinds with a profile to suit your needs.
Lush motors are the dogs wotsits so now is the time to upgrade.

 

[MikeDeY]

Yes, plastic bit sounds a likely suspect, rest of engine should have had good oil pressure.
Neville Lush racing supplies new cams NOT regrinds with a profile to suit your needs.
Lush motors are the dogs wotsits so now is the time to upgrade.

This is very interesting. I'm gonna have to look into this.

 

[Rocket Scientist]

Tri Rocket is on track, check if the oil gallery up the back of the motor is clear, the rest of the engine may be fine. Best way to fix that head is to get some one to machine .015" of the head and the cam ladder and bolt it back together, then line bore the cam tunnels again. The silver head will fit the same. Use Harley Twin Cam 96 cube engine paint circa 2007-9. Prep the head well, super clean, and preheat the head to around 35deg C and give it three light coats. Add the second coat a few minutes after the first dries and same again for the third. Presto black head.

Nothin' wrong with black head

 

[MikeDeY]

Nothin' wrong with black head

As of now I have two engines with bad heads. My life is a never-ending quest to find good head.

 

[idk]

There are a lot of people out there with the same problem, or so I am told.

 

[Neville Lush]

Bruce is correct, you would reuse the stock cams if you wish. If they are serviceable. Other options available. I got your PM , but did not quite understand it. Sorry, must be my OZ style english . I have been having all sorts of email problems but you can contact me from the details on www.nevillelushracing.com Cheers . Nev

 

[Rocket Scientist]

There are a lot of people out there with the same problem, or so I am told.

Yep.