'73 - '80 rocker assembly eval

[FJcovet]

I recently rebuilt my head and I am now looking at my rocker assembly. I am trying to decide weather to rebuild or not. The reason I took the head off was because I was getting significant valve noise. When the shop rebuilt the head they found a bent exhaust valve on #6.

Here are a few shots of the rocker shaft.

 

[FJcovet]

I brought the shaft to a local engine shop and he said it was marginal with about 3 thousandths wear.

He also measured the wear in the rocker bushings and got about 1 1/2 thousands wear.

The rocker faces were also worn. Hear is a shot.

 

[FJcovet]

I decided to remove the wear from the rocker faces with a file. I have a picture below. When I showed the guy at the engine shop he thought that was a bad idea and recommended having all the rockers professionally re-surfaced.

 

[FJcovet]

I am trying to decide on my best option. I could replace the rocker shaft part # 13901-60022 from Village Toyota Parts for $107 plus shipping to eliminate the 3 thousandths of wear and reuse my existing rocker bushings, or I could replace both the rocker shaft and the bushings (part #13801A) for $196 plus shipping. If I bought the bushings however, I would have to have the shop remove my old ones and press in the new for around $30 more.

The last option is to just resurface the rockers and just put it back together.

Does anyone have guidance on this?

 

[Pin_Head]

It doesn't look that bad visually, but .005 total clearance is not good, so I would be inclined to either replace the whole shebang with new parts or get a good used assembly.

 

[FJcovet]

Thanks pinhead. I ordered the shaft and 12 rocker bushings. I can't find part numbers for the bushings that are in the shaft supports. Are those typically replaced at the same time?

 

[FJcovet]

Village Toyota parts canceled my order. I don't know why yet, but I am trying Online Toyota Parts.

 

[FJcovet]

Online Toyota parts could find the bushings, but not the rocker shaft, which they said has been discontinued. The only place I could find the shaft is at $OR.

 

[FJcovet]

$OR was not able to find a new rocker shaft. Used only. I plan to replace the bushings and resurface the rocker faces.

 

[ColonelMustardFJ40]

When I cleaned up the valve side of rocker arm, I used a honing stone to very carefully remove the excess material and maintain the correct radius (to me the file approach is a bit crude). This also results in a shiny smooth surface. Just saying.