Cresson 2021

[michaelmosty]

I hope the repair is on the “easier” side. We definitely missed having you out there racing with us Frederic!!

[ShadowBolt]

I assume the issues will be in the heads/head gaskets but just hoping they are repairable. As long as they are not cracked and the cam surfaces are okay. There are no cam bearings but they can be machined to accept cam bearings. There are no more new heads to be had. Ford sold all they had to DSS and other engine builders. I bought the last brand new set from DSS a few years ago. There are lots of good used heads around though.

JJ

[Supercharged111]

I assume the issues will be in the heads/head gaskets but just hoping they are repairable. As long as they are not cracked and the cam surfaces are okay. There are no cam bearings but they can be machined to accept cam bearings. There are no more new heads to be had. Ford sold all they had to DSS and other engine builders. I bought the last brand new set from DSS a few years ago. There are lots of good used heads around though.

JJ

And watch out because the cams are all different! All these years I thought a 4.6 was a 4.6, but the Mustang in particular got its own cams so be sure to run those or you'll be chasing your tail come dyno time.

[fscott]

Well, it's not gonna be an easy repair. The valves got hot, siezed in their guides, and then the cam lobes ejected the rockers. And one of the cam rollers had a bad bearing, and it ate the cam lobe. So I'm looking at valves, a camshaft, a rocker, and a couple of head rebuilds.
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The bottom end is more or less OK. There was no valve to piston contact. There's some cylinder wall damage, but it's in the "Disposable race motor, send it" category.

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I was going to slap on some spare heads that I have, but it turns out that they were run with low oil pressure, and the cam bearings are chowdered.

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This motor is going to become the B motor. I'll take my time rebuilding it, assuming that the block's not toast.

I've ordered a junkyard 4.6 from a 99, with 57k miles on it. I don't know if it'll arrive in time, so I may be doing Miata things at ECR. But here's hoping that I can get the Stang back together. I don't mind missing ECR, so long as I can make it to Hallett. Gotta get that BBQ!

[Supercharged111]

Cam "bearings". I had a 4.6 that ate the "journals" too. I abandoned it for a 289. Present day me would have sent that garbage, but it was WAY better than what you have.

[fscott]

Cam "bearings"

Everything eventually becomes a bearing if you don't have oil pressure.