[Bryanh24]

Originally Posted by chriscamaro69z28

I had lower pulley put on mine and with boost and while tuning it blew out the front seal. After the shop did some research many have said the front crank seal on lt4 is very thin. Most people to include myself put in the ls3 crank seal to replace the thinner lt4 seal. This might help you understand the front crank seal leak.

Oh okay. Yeah the performance shop also told me that the seals are very very thin and are prone to blowing it with more boost. Gonna have that replaced and hopefully she'll be good to go after this! How has yours been with the LS3 seal? No Issues?

[Markoz28]

A shop told me to buy an LS front seal #12585673 as it fit tighter and seals better.

[arpad_m]

Originally Posted by Markoz28

A shop told me to buy an LS front seal #12685673 as it fit tighter and seals better.

It's 12585673

[Markoz28]

I edited my previous post. Good catch arpad_m

[chriscamaro69z28]

Originally Posted by Bryanh24

Oh okay. Yeah the performance shop also told me that the seals are very very thin and are prone to blowing it with more boost. Gonna have that replaced and hopefully she'll be good to go after this! How has yours been with the LS3 seal? No Issues?

It’s been great no issues I also did might mouse catch can to help release some pressure in the motor

[Bryanh24]

Went ahead and told them to fix the seal with the LS seal part number that you guys gave me. I'll let everyone know how it works out!!