Need Help Please!
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Need Help Please!
Hey guys. Greetings and salutations. Got a question about a 1960 ford F100 with a 292. Im installing this engine for a customer on a side job. And to be quite frank about it this thing has been a headache from day one. Ive succesfully reinstalled the engine and it starts and runs. Though the complaint now is that that it has no power. So I go to readjust the valves. I found specs to set them at .019. I did this. While the engine was running I noticed that the valves on the left bank are opening and closing just fine. BUT the valves on the right bank move hardly at all. Theres no lift. I tried to adjust but when I did this RPMS dropped and the engine sounded like it was trying to die. Is this screwed up machining on the cam? Or is it me? Can someone help me please?
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the engine was just rebuilt 3 weeks ago. they were supposed to put in a new cam. Thinking they may have remachined the old cam for a lack of a new one. I think maybe they got their math screwed up and milled it all wrong.
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From: Adams,CO.
Originally Posted by ALBUQ F-1
Sounds like a bad cam. Why one bank would be bad is a puzzle. Maybe someone adjusted the valves incorrectly, wore out the lobes?
I have even heard of guys using the wrong gasket on one side after repairing that side only. Using too short/long a push rod when replacing that head only. Just possibilities, still can't help answer your question. Have you gone on the Y Block forums??
Welcome to the FTE site, wish it were under better circumstances that you made your very first post. But, good luck, the pro's may be here shortly.
Jon
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From: Adams,CO.
Originally Posted by bigjohn65
the engine was just rebuilt 3 weeks ago. they were supposed to put in a new cam. Thinking they may have remachined the old cam for a lack of a new one. I think maybe they got their math screwed up and milled it all wrong.
Woops, theres the rest of the story, I think you just got your answer.
Jon
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Appreciate the welcome. Thank you. I pulled a couple of pushrods to compare length. They matched up and were still straight. ive been beating my head against the wall trying to figure this thing out. Just thankfull you guys are willing to lend me your wisdom and share your experience.
I'll have the Roast Duck
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From: Northshore, MN
Jon, I think that makes the most sense, to me, too.
Modern oil companies are doing away with Z-additives, so if breaking in a new engine with modern oils, the "anti-wear" additive is lacking. This can ruin a cam in a very short time. Guys on the 335 forum have more info regarding the Z. Z=zinc oil additive. for flat tappet cams, it's pretty much a necessity.
Modern oil companies are doing away with Z-additives, so if breaking in a new engine with modern oils, the "anti-wear" additive is lacking. This can ruin a cam in a very short time. Guys on the 335 forum have more info regarding the Z. Z=zinc oil additive. for flat tappet cams, it's pretty much a necessity.
Last edited by havi; Jan 12, 2008 at 10:18 PM.
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From: AKRON ohio
I dont think you have cam lobe problems ONLY on one bank. I THINK that maybe the decking of the block, milling of the heads may have been done wrong, and just maybe one bank has the 1.43 ratio rockers and the other side has the 1.54 ratio rockers.
Also, the cylinder heads may be different. Some came with small intake valves and some came with larger intake valves.
Some heads came with 80 cc chambers and some came with 69 cc chambers.
Were all the rods the same? some are longer than others. If this is the case, one bank maybe be at zero deck and the others might be .100" in the hole.
Hope this helps,
Kevin Bigwin
Doesnt sound good to me, did you do the rebuild?
Also, the cylinder heads may be different. Some came with small intake valves and some came with larger intake valves.
Some heads came with 80 cc chambers and some came with 69 cc chambers.
Were all the rods the same? some are longer than others. If this is the case, one bank maybe be at zero deck and the others might be .100" in the hole.
Hope this helps,
Kevin Bigwin
Doesnt sound good to me, did you do the rebuild?
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Thanks. No. We had to send the original engine out. My customer sent it out through CHECKER. They sent it to a builder here in the valley. Personally I wasnt to crazy about the idea having checker do it. So if they did screw it up im dealing with a third party mess.