secondss

I'm in the process of doing an ls3 swap and have a few quick questions. I know I have to move the knock sensors to the sides and drill and tap holes...but how deep should I go and where should I drill?

Also the ls1 valve covers won't fit, is it best to by ls3 covers or is it safe to gut the ls1's.

HSV-GTS-300

Drill the 2 existing 8mm threaded knock sensor bosses out to the tapping size for a 10mm thread. You only drill to the depth of the 10mm thread. They are blind holes.

SNLPerformance

iTrader: (15)

OP,


Here you go!
http://www.ls1gto.com/forums/showthread.php?t=443140

VTC_WS6

iTrader: (9)

http://www.racetronix.biz/itemdesc.a...1-KSRH&eq=&Tp=

Just another option for you.

AwesomeChump

iTrader: (1)

Hey guys I know this thread is a few months old, but what size drill bit and tap is needed for this? TIA

jegten

iTrader: (22)

Drill with 8.5mm bit, then tap with M10 x 1.5 hand tap.

AwesomeChump

iTrader: (1)

I've looked all over for a drill bit that size with no luck but I did find this one http://m.summitracing.com/parts/wmr-w8619. Would that work?

jegten

iTrader: (22)

it should since they are matching them both.
i was going to mention that when i went to get the set for the second time, i went to NAPA and the kit they sold me had a standard drill bit, x/32. i just don't remember the x value.
yeah, if they are offering both as a kit, you should be good to go.

S10xGN

iTrader: (11)

Metric 10mm x 1.5 calls for a 8.5mm drill bit which is 0.335", closest US drill sizes are:

• 21/64 = 0.328"
• Q = 0.332"
• R = 0.339"
• 11/32 = 0.344"

HTH,

AwesomeChump

iTrader: (1)

Thanks for all the help guys! I'm going to go ahead and order the drill bit and tap from summit.

studderin

iTrader: (28)

It might be a nice tap and drill, But I would spend the extra 10-20$ over the cheap $6 summit drill and tap set, and get a real quality drill and tap. I nice drill and tap are almost priceless over using ones that are cheap and suck when you look at what your doing with it, and whats 5-$20 more whats your paying for. Its your time if it the hole dosn't drill nicem and the tap dosn't cut nice and clean, or gets stuck and breaks. Your doing this on a LS3 motor not a headlight bracket for your snow blower.

studderin

iTrader: (28)

go to you local tool house/ suppy store. you don't have to have that shipped even.

AwesomeChump

iTrader: (1)

Damn thats's a good point, I didn't even think of that. Off to the parts store I go! Thanks for the advice man!

68 SS

iTrader: (23)

Just remember start the tap a few turns then bck it out then go in a few more turns use plenty of oil and you will be fine just dont get the tap in a bind and try to force it.