Hello All,
I've been working on this project of mine. I've got a 2.0L type IV engine out of a '76 Transporter. Heads have 37.5 x 33 mm valves w/ oval exhaust ports. Before dissassembly had 115-130psi compression, except on #2 with only made 70psi. [1] Got the heads stripped down, cleaned up, and have almost all the valves out. On the 3/4 head, I'm having to use heat to get the keepers unstuck from the spring retainer. Normal?
The heads are very clean with little exterior surface corrosion. There is a good coat of carbon in the chambers but nothing unusual. The valve seats are a little dirty but do not look burned or scarred. The intake valves are a gray metal while the exhaust valves appear bronze. There was a fair amount of black half-burnt oil on some of the valve stems when I took them out, and the exhaust valves have some black, almost scorch-mark looking discolorations. Sound like I need new guides?
My plan is to just clean up the chambers and ports. I'd like to reuse the valves if possible, just lap them in. Guides if necessary.
Pictures will be posted shortly. I'd appreciate any knowlegable insight into what I've got.
Thanks, Harry
[1] The cylinders were simply rehoned and reassembled with new rings during a "rebuild" and picked up some corrosion during 10 years of sitting up, so I think that explains the low compression.