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Old 04-25-2004, 22:22   #1 (permalink)
UCNTRY
 
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frown 302 noise

i have a noise that i cant work out what it is. i recently bought the car and have had to replace the gearbox and have had a lot of timimg problems and carb problems. its an xd fairmont with 302c c10 sopme sought of new tce converter nine inch and so forth. the noise starts as you start to build revs originally it was only there when u revved it hard but has gotten worse as i have driven it around it also makes the noise when free revving but now it makes it at about 2000-2500 and just gets worse if you go any further and sort of feels like it has hit redline because it sort of dies, and now it makes the noise as you start it for about one or two seconds, it supposivaly has just had a new ac rollmaster timing chain put on dont know if it was correctly put on and it also has got poor oil pressure like on the standard dash gauge just cruising at about 1500 the gauge sits down on the yellow peg when the oil is warm can anyone help does anyone know what it is
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Old 04-25-2004, 23:06   #2 (permalink)
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Re: 302 noise

Sounds like a very worn bottomend. The noise is possibly the bottomend bearing rattling. I had that prior on my old 351 that had 345,000k's on it.

First thing I'd sort is the oil pressure, then go from there. Low oil pressure isn't good. Usually ends up in total engine rebuild.

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Old 04-26-2004, 03:06   #3 (permalink)
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Re: 302 noise

My old 302 had the same problem where you would rev it to 1500 and it would rattle and would get worse if you throttled off. It is definantly bottom end because when i pulled my sump off i found heaps of bearing peices some as big as a thumb nail. The bottom end is were you will be losing all your oil pressure. your crank will definantly need a grind and thats if it is saveable.
A rebuild will cost about $2500. my engine had done 320000 before it stuffed up.
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Old 04-26-2004, 03:37   #4 (permalink)
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Re: 302 noise

thanks guys whats your advice. it has done 234,000kms but when we got it it had cheap nasty oil in it.
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Old 04-26-2004, 04:08   #5 (permalink)
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Re: 302 noise

also why doesnt it do it when it is cold
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Old 04-26-2004, 04:35   #6 (permalink)
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Re: 302 noise

Quote:
Originally Posted by UCNTRY
also why doesnt it do it when it is cold
When the engines cold the clearances are smaller. Probably borderline acceptable.

As the engine heats up the metal expands and the clearances get larger. The larger the gap the more the oil pressure drops off. The more the oil pressure drops off, the more noise you get.

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Old 04-26-2004, 04:50   #7 (permalink)
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Re: 302 noise

Does it have the correct oil in it now? Oil thins out a bit when warm.
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Old 04-26-2004, 06:17   #8 (permalink)
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Re: 302 noise

yeah it has got penrite in it that is recommended for older engines. what do you people recconmend do as it is a daily driver.
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Old 04-26-2004, 18:07   #9 (permalink)
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Re: 302 noise

I'd recommend getting the opinion of a couple of workshops. If the engine needs rebuilding, consider a 2nd hand one and rebuild the original one as time & $$ allow.
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Old 04-26-2004, 21:12   #10 (permalink)
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Re: 302 noise

Agree with others that it's a flogged out bottom end. Suggest you change over to Penrite HPR50 to get you through until you can get the motor re-done.
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