V.C. Bolt size ?

[vaquaro]

:dunno: Changing V.C. gasket from RTV to Fel-Pro dry gasket , OEM bolts have shoulder and don't work with the dry gasket , what length(s) do I need ?

[Eagle]

V.C.?

 

Vacuum canister?

[HOrnbrod]

Using the FelPro gasket w. the 4.0 is no problem, but notice you have a 2.5. So what's the difference with the VC bolts? What do you mean by shoulder? :hmm:

[jteckmann]

I just replaced the gasket on my 2.5

 

I used 1/4"-20 thread, 1/2" long.

[vaquaro]

V.C.?

 

Vacuum canister?

:hmm: or Viet-Cong :rotf:

[vaquaro]

I just replaced the gasket on my 2.5

 

I used 1/4"-20 thread, 1/2" long.

Was that the OEM size used before RTV gaskets ?

[vaquaro]

Using the FelPro gasket w. the 4.0 is no problem, but notice you have a 2.5. So what's the difference with the VC bolts? What do you mean by shoulder? :hmm:

Shoulder is the larger diameter unthreaded portion of the flange bolt , :cheers: presumably to define the RTV gasket bead dimension

[HOrnbrod]

Then just use 1/4"x20x1/2" or 3/4" if it's not too long all-thread bolts torqued to spec. w. sealant on the bolt threads. I don't have a shoulder (non-thread portion of the bolt) on my valve cover bolts.

[jteckmann]

Was that the OEM size used before RTV gaskets ?

 

I don't know if the old ones I pulled out were OEM or from a previous owner. They were a different length - maybe 5/8"(?) But at the parts store, they only sold 1/2" and 3/4", so I just grabbed a pack of each. I was worried about bottoming out the 3/4", so I started with the 1/2" - and they worked fine. Just regular grade 5 bolts with a flange head and no shoulder.

[vaquaro]

Was that the OEM size used before RTV gaskets ?

 

I don't know if the old ones I pulled out were OEM or from a previous owner. They were a different length - maybe 5/8"(?) But at the parts store, they only sold 1/2" and 3/4", so I just grabbed a pack of each. I was worried about bottoming out the 3/4", so I started with the 1/2" - and they worked fine. Just regular grade 5 bolts with a flange head and no shoulder.

Thanks , I'll source some from Fastenal (probably 5/8" ) and get to work on curing this ongoing oil leak problem , hopefully for good :thumbsup: Gord

[Eagle]

Consider using Loctite on the threads of the new bolts. Squirt some brake cleaner into the holes in the head to degrease the threads. Put Loctite on the bolt threads and let it partially set up, then tighten. Don't use red -- that's permanent. Blue would be okay (medium hold), or probably even purple (light hold/small fastener).

[vaquaro]

Consider using Loctite on the threads of the new bolts. Squirt some brake cleaner into the holes in the head to degrease the threads. Put Loctite on the bolt threads and let it partially set up, then tighten. Don't use red -- that's permanent. Blue would be okay (medium hold), or probably even purple (light hold/small fastener).

:agree: