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98 GT engine start up knock

  • Thread starter Thread starter xpstang
  • Start date Start date Jan 23, 2006
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xpstang

New Member
Jan 23, 2006
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Jan 23, 2006
#1
  • Jan 23, 2006
  • #1
I have A 98 GT with 110,000 mi., and it started getting a clacking noise from the valves only at start-up. otherwise she runs great. the shop said that that is normal for high mileige cars. I am worried its doing damage if I dont fix it. Any info would help.
 

Mike97gt

it doe snot
Founding Member
Jan 26, 1999
10,633
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89
the people's republic of massachusetts
Jan 23, 2006
#2
  • Jan 23, 2006
  • #2
could have a cam chain tensioner bleeding down

does it only do this when the car has been sitting for awile.
 
K

Kilgore Trout

Fried or Broiled ?
10 Year Member
Mar 30, 2005
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Jan 23, 2006
#3
  • Jan 23, 2006
  • #3
Could also be due to a cheap oil filter with no drainback valve...
 
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xpstang

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Jan 23, 2006
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#4
  • Jan 23, 2006
  • #4
No the opposite, if the car sit for a while it wont do it.
I think it has something to do with the oil pump because its only on a cold start. But thats just a guess.
 
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xpstang

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Jan 23, 2006
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#5
  • Jan 23, 2006
  • #5
No only use higher end fram filters.
 

Mike97gt

it doe snot
Founding Member
Jan 26, 1999
10,633
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89
the people's republic of massachusetts
Jan 23, 2006
#6
  • Jan 23, 2006
  • #6
xpstang said:
No the opposite, if the car sit for a while it wont do it.
I think it has something to do with the oil pump because its only on a cold start. But thats just a guess.
Click to expand...


thats what i asked.. if you let the car sit overnight or for a extended time does it do it.. so i assume that if you shut it off warm then restart it's fine..

first try too use a MOTORCRAFT fitler.. then if that dont fix it look at the cam chain tensioners..
 

98stangv8

Active Member
Oct 3, 2003
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fayetteville, nc
Jan 23, 2006
#7
  • Jan 23, 2006
  • #7
mine used to knock only at startup, then a little more here and there, then I spun a bearing...
 

Outlaw97GT

Member
Sep 10, 2005
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Redneckville, Tx
Jan 24, 2006
#8
  • Jan 24, 2006
  • #8
xpstang said:
I have A 98 GT with 110,000 mi., and it started getting a clacking noise from the valves only at start-up. otherwise she runs great. the shop said that that is normal for high mileige cars. I am worried its doing damage if I dont fix it. Any info would help.
Click to expand...

What weight oil are you using?

To thick oil won't travel through the engine as fast when its cold.
 

the98stang

Active Member
Aug 12, 2005
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Clovis, CA
Jan 25, 2006
#9
  • Jan 25, 2006
  • #9
Try running some lucas oil through it...that sh1t works pretty well...
 

d98gt

Founding Member
Mar 14, 2002
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SE Texas
Jan 25, 2006
#10
  • Jan 25, 2006
  • #10
My car actually does the same thing and it confuses me. If it sits for quite some time it'll do it, though if its warm it won't
 
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