2000 miles on new motor and broke timing chain guide

[Expyguru]

Well my truck has been great, but then heard a rattle at the front of the motor wasn't bad but had me worried. Today is was loud so decided to pull the passenger valve cover. I found my chain was completely loose on the non tension side. So pulled the timing cover and the guide had snapped. I have never seen this before so trying to figure out how it did it. Also wondering if they make a really good set instead of the plastic ones.

 

[01yellerCobra]

I don't remember the years but there's a set of metal guides. But then those are in the 4.6. I don't know if they're the same as the 5.4.

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[spadesluck]

I have only seen plastic ones for my 5.4. Never have come across metal ones, don't think I would want to use them either since it would be metal on metal. The bolts that hold the guides in place could have worked loose and been the cause of breakage.

 

[Expyguru]

the 4.6 are shorter but have metal backing on the plastic. I just wish they had them for the 5.4.

The bolts where still in the whole and tight so not sure what caused the break. My Cams are pretty aggressive stage 2 with 580 lift might have caused a lil more pressure on the guides.

 

[01yellerCobra]

I have only seen plastic ones for my 5.4. Never have come across metal ones, don't think I would want to use them either since it would be metal on metal. The bolts that hold the guides in place could have worked loose and been the cause of breakage.

The support is metal. The part the chain rides on is plastic. It's what I'm running in my stroker.

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[Expyguru]

Well found the issue. I went to ford bought an OEM guide and the quality was 100 times better than the one I had. So if you ever do a timing job stick with OEM