Head Compatibility

[BraveSoul]

I have 2.5L 120 s/n 0C661190 with a cracked head, I found someone selling a good head of a 120 s/n 4659177 are these heads interchangeable. I could not find a look up that would accept the 4659177 serial number for me to reference.

 

[Scott06]

I have 2.5L 120 s/n 0C661190 with a cracked head, I found someone selling a good head of a 120 s/n 4659177 are these heads interchangeable. I could not find a look up that would accept the 4659177 serial number for me to reference.

This listing shows one head for the 120 from ‘63-’89 so i suspect only one head was used the entire run of the 120

Quicksilver 2.5L Cylinder Head (1963-1989)

All new Quicksilver cast iron cylinder head with hardened valve seats Heavy duty valve springs Screw in rocker studs Marine grade brass core plugs Features Black-X Composite valves for 42% longer life

www.michiganmotorz.com

i think the early serial numbers like you are looking for are pre 1982 and most places dont have listings fir parts

 

[BraveSoul]

This listing shows one head for the 120 from ‘63-’89 so i suspect only one head was used the entire run of the 120

Quicksilver 2.5L Cylinder Head (1963-1989)

All new Quicksilver cast iron cylinder head with hardened valve seats Heavy duty valve springs Screw in rocker studs Marine grade brass core plugs Features Black-X Composite valves for 42% longer life

www.michiganmotorz.com

i think the early serial numbers like you are looking for are pre 1982 and most places dont have listings fir parts

Thanks so much again Scott! And also the S/N explanation makes much sense.

 

[ScottinAZ]

there is one source that has the serial numbers for both the engines listed. the head in both cases is P/N 936-5319, so you should be good to go.

 

[Bondo]

Ayuh,.... A 120 head, is a 120 head,....

 

[achris]

Ayuh,.... A 120 head, is a 120 head,....

Even when it's on a 3 litre block....

 

[BraveSoul]

Ayuh,.... A 120 head, is a 120 head,...

Question again for you if you could please help. The main crank for these two engines are they the same?

Wondering if I can use the pistons from one to the other?

 

[achris]

Moving pistons from one block to another isn't recommended. Cylinders are bored and honed to match each piston, individually....

 

[Scott06]

Moving pistons from one block to another isn't recommended. Cylinders are bored and honed to match each piston, individually....

Agreed done that in backyard hone the bore re- ring plastigauage bearing rebuild … had s loads of blowbuy and never idled right