Previous owner '68

[raggedjim]

So I decided I would do a leak-down test. I know, the results might be different if the engine was hot and fully oiled, but I did it anyway.

Test psi was 100psi and I did test both at top stroke and bottom of each cylinder.

Results were:

Cyl 1 top - 90%, bottom - 92%
Cyl 2 top - 84%, bottom - 88%
Cyl 3 top - 84%, bottom - 80%
Cyl 4 top - 90%, bottom - 90%
Cyl 5 top - 82%, bottom - 80%
Cyl 6 top - 86%, bottom - 84%
Cyl 7 top - 96%, bottom - 94%
Cyl 8 top - 90%, bottom - 90%

Now this was a long sitting, dry engine. Given the results I am going to replace the valve guide seals and hope for the best. If you think I'm screwing up let me know.

[clay68c10]

Looking at how clean the valley is on that one, and your cold test results, I'd say it's a runner.

[raggedjim]

Originally Posted by clay68c10

Looking at how clean the valley is on that one, and your cold test results, I'd say it's a runner.

Too late, I couldn't resist tearing it down! I'd hate myself if I didn't.

Pics to come...

[raggedjim]

So, I pulled the heads. I decided to go ahead and put new head gaskets, valve seals, etc. Cylinder are pretty clean, no ridge at all, and still some crosshatch on the bores.

Tops of pistons have carbon, she was running a bit rich. The liquid is Marvel Mystery fluid I used to store engine for the last 20 years.

[raggedjim]

Cleaned tops of pistons with Aircraft stripper, not perfect, but it'll do. By the way, they are .030 over.

[raggedjim]

Main bearings and rod caps look good. I put them back with a bit of assy lube and torqued them down.

[raggedjim]

Crank looked good too.

[raggedjim]

Shop is kinda a mess while I'm doing all of this.

[raggedjim]

Wasn't going to pull the cam but I decided to so I could get some assembly lube on it. I also replaced the cam plug. Not sure what cam is in it. The end was stamped B040A and 891344 which I couldn't find anywhere on the web.

No pic of cam but here's one of the timing chain and the rear cam bearing.

[raggedjim]

Starting on the heads tomorrow. If all looks good I'll replace the valve seals, lap the valves, and reassemble them. They are nothing special, I just want a good running truck.

[zicc1835]

you got busy in a hurry ....nice progress