LT1TA

iTrader: (17)

hey guys i was removing the freeze plug from my ls1 and trying to put it on my new 408 iron block. but there's a freeze plug in the hole where the sensor goes. Whats the reasron that the plug would be there? Thanks

LT1TA

iTrader: (17)

pic on right is my ls1 left is the new plugged block

01ssreda4

iTrader: (96)

Somebody screwed up I'd say.

chrisfrost

iTrader: (8)

You're 408 must be an ls2 or a 2005 engine or newer . Starting in 2005 , the cam position sensor was moved from the rear of the block right behind the valley pan cover to the timing cover and the camshaft gear is different . There is a junk yard in Oklahoma called "Ruperts used auto parts" that a few months ago had 7 or 8 of these timing covers for $35 including the cam sensor and was willing to ship (you pay shipping) . They are going for about $75-80 when You can find 1 on LS1 tech classifieds . Just Google Ruperts in Oklahoma and call . Then when You get the cover , You need to switch the 2 outside wires of the three wires in the harness and make sure and at least change the cam gear to the LS2 gear or get a Cloyes LS2 timing set (Rock auto parts) for $28 .

01ssreda4

iTrader: (96)

The Gen 4 blocks A. have no provision for a rear mounted cam position sensor and B. have oil towers for the optional DOD (displacement on demand oiling system). That is a Gen 3 block. A cam position sensor needs to go there, unless OP wants to get a front cover and cam sprocket then extend his harness to reach.

parks450

iTrader: (17)

01ss is right. The gen 4 blocks wouldnt have the cam provision their. Its a earlier style block for sure. Someone either f@#%+d up or they they just plugged it for shipping purposes? Ive seen blocks shipped with plastic plugs in the holes to minimize dirt and to protect threads but never a freeze plug.. Pull it out and see what you find.

LT1TA

iTrader: (17)

ok, i will try. i was worried about screwing something up. i bought it from a member on tech, and i don't know what he did it for, it just came back from the builder thursday, they didn't mention a thing. i never noticed it until i tried to assemble it.

Sales2@Texas-speed

iTrader: (5)

Just look at the front cover and see if the cam sensor and harness are there instead. That is not an uncommon thing to see, even in Gen3 blocked 408's.