Ford 302 issues

Jakem

Seaman
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Apr 25, 2021
Messages
57
I am starting to believe so...any sense wasting 400 a head to have them done in your opinion
 

alldodge

Supreme Mariner
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Mar 8, 2009
Messages
34,300
Valve job shouldn't cost 400 each, maybe on the high side 400 for both, might look for another shop.

I think you needs rings which means it needs to be bored, new pistons and the rest

Should do the heads when doing the block
 

alldodge

Supreme Mariner
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Mar 8, 2009
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34,300
Search for "marine 302 long block" and can get them around 2400 or get a 351 for about the same money
 

alldodge

Supreme Mariner
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Mar 8, 2009
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34,300
Going stock, and assuming every valve and seat cannot be reused

Heads
New valves 25 to 35
Valve seats 100
Block
Pistons 150
Gasket set 100
Timing chain set 75
Lifters 70
Bearings 100
Oil pump 40

Grind crank 140
Install cam bearings 35
Assemble pistons to rods 45
Bore block 160

Looks like 1050

Assemble V8 500 (If you have shop put it together)

Misc 300
 

Jakem

Seaman
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Apr 25, 2021
Messages
57
I talked to an engine machine shop and they do heads as well and he said my readings weren't cause for complete engine. Heads yes not just seals...complete for 395
 

matt167

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Sep 27, 2012
Messages
2,814
Compression reading alone won't tell you that, and $395 is wayyy to cheap to have a set of heads rebuilt. $395 each is probably within reason. But you need a leakdown test to determin, valves or rings, or head gasket. Comp test tells you there is a problem, leakdown tells you where it is


A truck 302 out of a 90's F series is in the realm of a $300 motor running. It will either be roller cam ready or have a roller cam ( 1993 and later. I think. don't quote me on that ). That only matters for the distributor because you would need to swap distributor gears on your marine distributor if it were a roller cam.. You just need to put marine core plugs and head gaskets into it and possibly change front cover and oil pan depending, since Ford used a number of different things. You can check the compression on a motor even before you buy it
 

Jakem

Seaman
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Apr 25, 2021
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395 is for one...I will get a leak down before I strip it..thanks for the help
 

jhande

Petty Officer 1st Class
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Jun 26, 2010
Messages
328
You could also do a wet compression test.
Squirt some oil in the cylinder and take a reading.
If the reading is the same as a dry test the rings are good. Pointing to a head problem.
If the reading is higher the rings are bad.
From your compression test readings of 120 - 140 something is wrong. Shouldn't really be more than 10 difference.
Oil on plugs, my guess worn oil rings on pistons.
If you do rebuild the motor make sure they check the heads and block decks for even/flatness.
 

Jakem

Seaman
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Apr 25, 2021
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57
When I first took it out there was black smoke coming from oil cap...not much and not for long..also white up carb and smelled like raw fuel
 

jhande

Petty Officer 1st Class
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Jun 26, 2010
Messages
328
Either time for a rebuild or replace with maybe a 351.
 

kenny nunez

Commander
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Jun 20, 2017
Messages
2,091
It also appears from your #29 post that the intake manifold has an internal and external crack on the underside letting exhaust gas leak into the crankcase and into the area below the carburetor.
 

Jakem

Seaman
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Apr 25, 2021
Messages
57
I started over on my valve adjustment as someone suggested they were to tight. All the cylinders that were 125 are now 150. The others are 140 ish.
 

Jakem

Seaman
Joined
Apr 25, 2021
Messages
57
I cannot find this anywhere for my 302. Any suggestions
 

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