ROOKIE QUESTION ON BBC.

[RACER52]

WHAT YEAR AND MODELS FIT UNDER THE "GEN 4" BLOCKS
TRYING TO BUY PARTS AND NEED TO KNOW.

[BigJetDaddy]

I think pre-1991 is Gen IV
91-96 is Gen V
post 96 is GenVI
hope this helps
bjd

[RACER52]

THAT SOUNDS LIKE WHAT I'VE HEARD. THANK YOU

[Craig]

I don't think there is a clean break between the 4 and 5. Friends has a Baja he bought new in 1992 and it had a Gen 4 502 bowtie block in it.
[ July 11, 2003, 04:09 PM: Message edited by: Craig ]

[502procharger]

Craig, i think your friend might be wrong. I thought all 502's which began in marine applications in 1991 were gen five. I have never seen nor heard of a gen IV 502 BBC. Who knows i could be wrong.

[Infomaniac]

I think mine is a IV but it is considered a V

[Squeezing Spectra]

Nope 502`s did come as gen 4 from mercruiser i have one sitting in my garage and they also had a bowtie block not a standard block. Bruce

[Infomaniac]

Mine is a Bowtie. It was one of those Warranty deals.
Merc smacked the block the valve cover rails and the crank snout.
New crank block was OK and nice repairs to the heads.
[ July 11, 2003, 07:04 PM: Message edited by: Infomaniac ]

[Squeezing Spectra]

Hey info does that mean we got the good stuff LOL. Bruce

[Infomaniac]

I could use another one. :D
How far can you safely bore the Bowtie block?
I have some alcohol pitting. It is only 4.5 now.
[ July 11, 2003, 07:18 PM: Message edited by: Infomaniac ]

[Infomaniac]

Here it is last year. Bent an exhaust valve with wet headers. http://www.***boat.com/image_center/data/504/211Waitin_on_Heads-med.JPG

[GofastRacer]

"Bent an exhaust valve with wet headers". Ahhh yes wet headers!!!.. :mad: :mad: :mad:

[Infomaniac]

GofastRacer:
"Bent an exhaust valve with wet headers". Ahhh yes wet headers!!!.. :mad: :mad: :mad: The zoomies went right back on. I barely had any water going to them too.

[GofastRacer]

Yeah I hear that, that's why my Bassets look so cool!. :D :D