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post #1 of (permalink) Old 06-05-2003, 11:32 PM
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351 Windsor rebuild

I just picked up an '85 Bronco with a 351 Windsor for $1000. Clean inside, 4x4 seems to be in good shape, runs good except for one little problem. The engine has near 150,000 miles on it and suffers from a little blowby problem, to the tune of about 1 quart every 100 miles or so. It does not smoke or burn oil. Unless you count the stuff that is dripping onto the exhaust manifold. So I figure I would like to replace the heads.

Is this a good place to start?
What are the best heads to buy?
As long as I am in there should I also replace the cams?
Is it even worth it?

I would like to turn this into a nice 4x rig and can take things apart and put them back together prety good and time is not really a problem.

So I figure for $1000 plus the cost of heads I will have a darn near brand new engine.

As you can probably tell I am new at this whole thing. The most serious surgery I have personally done is to replace the front main seal and h2o pump but I do not think swapping out the heads is anything that I can not do.

Is this enough to get you started? [img]images/graemlins/confused.gif[/img]
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post #2 of (permalink) Old 06-06-2003, 02:04 PM
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Re: 351 Windsor rebuild

Blow-by is usually caused by worn rings, not worn heads.
The term blow-by is coined from compression "blowing by" the pistons.
Personally, I wouldn't spend the money on new heads only.
Do that, and the new-found compression from better sealing valves,
will most definitely fry the rings, and won't help the mains or rod bearings either. [img]images/graemlins/frown.gif[/img]

Have you checked the PCV valve lately? Could be plugged.

Do yourself a favor, and perform a compression check first.
Get a leak-down tester, (some stores will loan or rent them) and see what shows up with that as well.

Once you have compression and leak-down numbers, you'll get a better idea of what components are worn.

I'm a firm believer in the rebuild everything at one time only philosophy. [img]images/graemlins/wink.gif[/img]
You're only asking for trouble if you do it "piecemeal" style.

Welcome to the forum by the way! [img]images/graemlins/grin.gif[/img]
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post #3 of (permalink) Old 06-16-2003, 04:06 PM
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Re: 351 Windsor rebuild

Amen! [img]images/graemlins/smile.gif[/img]
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post #4 of (permalink) Old 06-24-2003, 11:49 PM
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Re: 351 Windsor rebuild

you can buy a reman motor from advanced with heads and a 18 mounth warranty for 850.00 plus core charge
80BRONCO is offline  
post #5 of (permalink) Old 06-25-2003, 09:33 AM
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Re: 351 Windsor rebuild

how 'bout a long block w/ a 7yr, 70k mile warranty for $1160 here
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