I a a new member and I bought a 66 rusty bronco that has issues with the head. Rather than fixing it, I decided to find a runny 200 and just replace the 170. So I found a guy selling a 200 out of a 67 fastback which he claimed had 85k miles on it. the engine would only run while pouring gas in it but sounded fine so I bought it. so with everything that I buy on CL I find out more about it after i got it home.

I took it to the car wash and after a good cleaning I noticed a void if removed on the rear freeze plug on the head. the blocks paint was worn on both sides of the head from what looks like a really leaking head gasket. So I'm thinking the rebuilt head could be a good thing but I am concern that this head is leaking and don't want to install it and find out later.

I did install the engine on a redneck engine running stand and ran it for about 60 sec and it ran great. I just don't have a radiator yet to run water in it. when I get a radiator hooked up how long should I run it until I know I'm good? I have to swap the oil pan out of my bronco when I pull the 170 so that will get a new gasket. Is there anything else I should check while its out?

Thanks for any help!
John

 

Also, Im switching from the holley to the autolite 1100 that was in the Bronco and want to rejet it for this motor. I have two or these carbs from early broncos...one has a 58 main jet and the other a 60. I was thinking of starting with a 67 for the 200 and work my way down...any thoughts?

Thanks
John

 

Leave the carb jetting as it is until you have the engine running and then you can determine if a change is needed.

 

I would think the head gasket would have to be leaking pretty seriously for it to rust off the sides of the head. The gasket would have to be pretty much missing.

Not sure if there's a good amount of time to run it, but if you get the radiator hooked up, run it for a while and then see if there's steam in the exhaust, or if you get oil droplets in the radiator. Also, after you shut it off, check the spark plugs and see if one is washed clean. That'd indicate a gasket leak.


Otherwise, just spend the extra and replace all the exterior gaskets on the engine. MUCH easier to do when the engine is out of the vehicle than when it's in.

 

X2^^^^^^^^^^^^^^^

 

should be able to hook up a radiator to it tomorrow and make sure theres no leaks...below are the plugs...all but number 3 look good.



#1





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#6

 

If you hadn't mentioned it, I don't think i would have thought #3 stood out.
They all don't look that great. Not engine bad, just tuning bad. It looks like it needs a good tuneup, carb rebuild, etc, and then a good long drive to clean out the cobwebs.