Dean's List gets another motor

[alldodge]

Never thought head bolts would be such an issue.
Mistake 1 was to use a 454 as the baseline for the head, wrong. Find a ARP kit 3607 which comes with 3 different lengths and 8 are 5 inches which are to long.

Original bolts removed from head were 24 each at 4.187 and 8 at 2.187, with speck listing is 4.125 and 2.125 respectively.

New bolts are 4.060 and 2.060 which are same as required for 502. The 502 has some blind holes and the 454 does not. Most on OSO use 3601 which has 3 different lengths of bolts but only 4 bolts are longer then others which are used in the lower inside corners of the head. Have questions out trying to find out what are the lengths of the actual bolts

The 454 MPI is a different animal

 

[Scott Danforth]

Rectangular or Oval ports?

Bolts or studs?

 

[alldodge]

Bolts and rectangular

 

[Scott Danforth]

Casting numbers for heads? Assuming GM

 

[Scott Danforth]

3701 has 3 length of bolts. Verifying.......

 

[alldodge]

There 088 GM cast heads

Also came across the head gasket issue but think were good with it.
502 STD bore 4.446
454 bored .060 over 4.310
The first 502 head gasket set picked up was larger then the bore of the 454.

 

[Scott Danforth]

ARP 135-3701 ARP High Performance Series Cylinder Head Bolt Kits | Summit Racing

Free Shipping - ARP High Performance Series Cylinder Head Bolt Kits with qualifying orders of $109. Shop Cylinder Head Fasteners at Summit Racing.

www.summitracing.com

Head gaskets for your 468 are specific to the 4.31 bore. The 502 fire ring is too large and the 4.25 bore 4.28 fire ring are too small

I went with felpro pro MLS as I couldn't get Cometic in time back them

 

[alldodge]

ARP 135-3701 ARP High Performance Series Cylinder Head Bolt Kits | Summit Racing

Free Shipping - ARP High Performance Series Cylinder Head Bolt Kits with qualifying orders of $109. Shop Cylinder Head Fasteners at Summit Racing.

www.summitracing.com

Head gaskets for your 468 are specific to the 4.31 bore. The 502 fire ring is too large and the 4.25 bore 4.28 fire ring are too small

I went with felpro pro MLS as I couldn't get Cometic in time back them

Does appear the difference in 3601 (6 point) and 3701 (12 point) but it doesn't list the lengths

Which Felpro head set did you find?

 

[Scott Danforth]

Does appear the difference in 3601 (6 point) and 3701 (12 point) but it doesn't list the lengths

Which Felpro head set did you find?

Have to look thru pics. The summit site doesn't have my purchases from 3-4 years back

 

[alldodge]

What I find with 454 there are cut outs for the valves, the 502 doesn't have them

 

[Scott Danforth]

That's because the 502 has a bigger bore

I notched my bores for unshrouding the valves

i believe the head gaskets I used are Felpro 1071041. However I couldn't find a pic or receipt to verify

Was looking at Cometic H1173SPQ040S however they were not stocked

 

[Scott Danforth]

here is my thread post on the head gasket.

BBC build- Don't tell the Admiral

Depending on the ARP bolt, its between 15% and 40% stronger than a grade 8 Even had them custom make some 220ksi bolts for work

forums.iboats.com

since I was shooting for .040, the number above must be it.

dont have a pic of the bore notching. however it was .09 above the top compression ring and hand-ground to match the gaskets. I followed an old Hot Rod mag article

 

[alldodge]

Getting FelPro 17046
OSO folks say its good for STD to .060, has 4.370 bore

 

[alldodge]

This motor does not want to be built

Installed heads and tightened bolts down in 4 passes. FelPro said wait 10 minutes and loosen each bolt one at at time and retighten to spec in one pass. Never done this before but ok since FelPro stated.

Well one of the block threads said NO and heard a crack and it wasn't from the torque wrench. Removed the bolt and piece if thread on the bolt. bolt is fine but not the block. So we have a Helicoil ordered and another head gasket.

 

[Scott Danforth]

Ouch

 

[alldodge]

Installed Thin-sert and all together except unable to get oil up the push rods. The $20 prime tool we got will not seal up enough to build pressure, keeps leaking from the top.

Looking at Jegs tool and appears to be better built

Also picked up crankshaft tool to turn motor over by hand to align lifters so oil can make it to all lifters

 

[Scott Danforth]

I have an old 4.3 dizzy body with the gears ground off as my priming tool. if you pre-soak the push-rods in a skinny container of oil, it fills them up, less air to displace.

 

[alldodge]

Didn't take a pic but motor is done and now its wait till the boat comes out

 

[Scott Danforth]

What caused the issue with priming?

 

[alldodge]

What caused the issue with priming?

Never did get it to fully prime. Pulled a lifter at end on each side and oil was making it there, but it only made it up 3 push rods on port side. Rotate crank 90* a few times, and other then cold 20w50 oil, don't know.