Complete valve failure

>>15761627
Lower rpms like that or any altitude difference shouldn't fuck with valves at all, it bent/broke, came apart, what?

>>15761627

It's a Ford.

>>15761637
So I tested everything from the coil to the plugs (which looked normal) the wires ect but I did the "paper in tailpipe test" and both exhaust tips sucked in air...

I have an appointment with a mechanic who can properly diagnose the problem and get it down on paper but I built the car and I'm 80% sure it's the valves

>>15761627
was the engine run in before this road trip and the run in oil changed?

>>15761699
I got the engine primed and my builder told me how to do the break in cycle. He said change the oil after 10,000 miles

>>15761707
nope, it needs run in to harden all the surfaces, especially the cam, on a different oil and changed after about 4 hours of running from build.

I suspect you have flattened a cam lobe, or thrown a rocker, worst case is that the metal particulate from break in has got into a lifter or blocked an oil galley and starved the engine of oil.

Drop the filter and pour out the contents, and check you sump for metal bits or a shiny reflection in it.

Also compression test it, but turn it by hand first to make sure valves aren't stuck open.

>>15761722
Holy fuck kill me now, by the time I got here it idled like shit and would even stall. It was vibrating like crazy at low rpms and lost a lot of power... So is that it? Was I just clueless and ill informed about how to deal with a new engine? What's this gonna run me to fix?

>>15761739
If you have spanked the cam, it would cause these issues by affecting the valve timing, a flat spot will not actuate the valve correctly.

If a rocker has moved or is way out of adjustment, it would do the same, if metal bits have got through the oilways, the engine is toast.

You are looking at at least a strip to the cam and a repair or any parts, you need to check for metal in the oil, im not talking big chunks of metal, fine bits, but as you can imagine, metal in oil is not good and the engine will need a full rebuild.

Check the oil and do a compression test.

>>15761627
>taking a 40+year old motor on a road trip
>driving an outdated piece of American trash

You brought this on yourself

>>15761756
Who doesn't dream of driving across county in a classic mustang man, I'm just a kid, I thought I had everything ready. This is probably one of the worst things that could have ever happened too me.

>>15761789
it's just an engine man, argue it out with the builder, come to some agreement with him.

That engine is a very easy engine to build, so if all else fails, it's a good one to learn on.

Good luck sir.

>>15761795
Well I'm stuck in Vancouver and school starts in three days so I figure I'll get a 302 of craiglists and drop it in. I can use my uncles garage and rent an engine hoist. Maybe I'll ship the old block too Ontario, I do have a year warranty....

Should've just bought an LS1

>>15761800
well you are sorted then if you have a warranty.

Pull the valve covers and make sure it hasn't dropped a rocker first. Then check the oil for metal.

>>15761800
An explorer 302 is what you need, pretty much the best and the last 302 ford ever had in mass production for new cars.

That or a cobra 302.

302's are bullet proof (my 1998 explorer has 230k miles) but honestly it sounds like a break in procedure was not followed.

Also. 2800 RPMs at 75mph sounds kind of high for 2.73 gears.

My explorer for sure does less than that at 75 and it's got 3.73 gears and pig fat AWD. Sounds like your engine was on the way out.

>>15761805
Cheers,

I have an appointment Tuesday at a local shop and I'll have them do that. They were originally just going too diagnose the issue but I'll tell them what I think happened. I don't have any tool of my own in this time zone.

>>15761808
I was just guessing to be honest it could be lower, i don't have a tach, but it's a c4 with 1:1 at the end so I calculated 2800. The engine and transmission were rebuilt so I wasn't expecting any problems

>>15761707
If it you stuck to the break-in procedure, go tell your engine builder to build a new one. Whatever the cause, it shouldn't fail this soon.

>>15761808
Your Explorer probably has a lot taller tires, and an overdrive trans.

>>15761707
>10,000 miles on break in oil
Niger are you fucking high

>>15761789
I definitely didn't. I didn't grow up wanting to drive old steel boxes across the country I swear I don't see the joy in that. All my friends are like that. My first car was American. Never again. I'd dream to drive an acura integra type R DC2 across country before I drive something as old as my mom. Classic cars bore me. Then again the Japanese bug bit me when I was 13. I'm 23 now and have been with the rising sun ever since.

>>15761844
>rising sun

Topkek

>>15761707
>10k miles on break in oil
Pretty sure he meant 1k miles there buddy.

>>15761844
A ITR is also an old steel box, and you won't have a good soundtrack unless you're letting the engine sing in a lower gear.

>>15761856
Not as old as a 45 year old car.
I'll enjoy my 8K redline banging through the gears before I drive a 5 thousand pound coffin thanks.
>an ITR is an old steel box
Don't make me laugh

>You won't have a good sound track unless your letting the engine sing in low gear
Nigger what are you on about.

>>15761844
This is about as cringe worthy as Ken-sama.

>>15761890
People have their preference
How is this cringe?

>>15761872
>I'll enjoy my 8K redline banging through the gears before I drive a 5 thousand pound coffin thanks.

>don't acknowledge the comfy feeling of driving a veeate @1500 rpm on a highway

busrider detected

>>15761756
>>15761844
>>15761872
>>15761905

Of course THIS guy derails the thread

2800 does sound a bit high, but only by a few hundred. OP, I'm looking ato dd a classic with the exact same set up (302/c4/2.73), what was your highway mpg?

File: 1465174791805.jpg (58KB, 750x600px) Image search: [Google]

58KB, 750x600px

>>15761914
>>15761912

Thread is now destroyed. Lasted longer than I thought desu.

>>15761923
About 20mpg with an all stock setup

>68' block

If the original cam was reused there's a good chance you round off a lobe.

Modern low zinc oils don't play nice with old valve train components, They need the zinc for anti wear, so if you run modern conventional or synthetic you'll round a lobe off in no time.

Old shit like that needs shell rotella or delovac, diesel oil is good for old motors.

>>15761932
Hugs! cutest kid I ever saw to date.

Dammit.

>>15761627

Options for next rebuild in order of what you should do

1 Go with a hydraulic roller cam
2 Go with a hydraulic flat tappet cam with a high quality lifter (i.e. hardened billet or ceramic coated) be sure to run ZDDP oil

>>15761627

Sounds like your builder used Chinese junk