1990 Mazda B2200 p/u valve noise
Karl Perry
First post here. I hope this is the appropriate forum. If not, would
someone please guide me to the correct one?
We've had a 1990 Mazda B2200 pickup about 2 months. 112,000 miles. I am
not its regular driver. I've noticed in the last couple of weeks that
occassionally, when first started in the morning, I hear a ticking sound - I
figure it's a valve knocking against a stuck tappet? This lasts for 10-15
seconds, then abruptly stops and everything sounds nice and smooth.
How can I track down the exact problem, so I can determine how serious the
problem is? I've never dealt with this before.
TIA,
Karl Perry
zorro
I'm not 100% sure but if your truck has hydralic lash adjusters like a few
Mazda motors, one may be getting tired and taking a bit longer to pump up.
These things are sort od like hydralic lifters but installed in the ricker
arm. At 112000 I wouldn't worry about it. Meanwhile, if it's as I said, it's
not a hard fix either. Do them all if you decide to fix it.
"Karl Perry" <kap...@NOSPAMcablespeed.com> wrote in message
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Karl Perry
Karl
"zorro" <zo...@texas.com> wrote in message
news:I_Gdb.80445$gV.7...@news2.central.cox.net...
E. Meyer
Perry" <kap...@NOSPAMcablespeed.com> wrote:
There was a known fault with these that the oil ports to the lifters were
too small. Mine started doing this at about 40,000 miles. I switched it to
Mobil 1 and that was apparently thin enough to cure it.
Curly
Besides valve lifters, it could very likely be the timing chain slack
adjuster. With that many miles I'm sure the guide rails are worn and
the chain is stretched. I don't know if this is an interference
engine or not, but I would look into it. If it is a interference
engine, it will bend the valves if and when the timing chain jumps.
Cheaper to service the chain before.
E. Meyer
9bc72dd7.03092...@posting.google.com, "Curly"
<tle...@attglobal.net> wrote:
That engine has a timing belt.
Karl Perry
"Curly" <tle...@attglobal.net> wrote in message
news:9bc72dd7.03092...@posting.google.com...
>
> Besides valve lifters, it could very likely be the timing chain slack
> adjuster. With that many miles I'm sure the guide rails are worn and
> the chain is stretched. I don't know if this is an interference
> engine or not, but I would look into it. If it is a interference
> engine, it will bend the valves if and when the timing chain jumps.
> Cheaper to service the chain before.
Aiii! I just went through that with my '90 Mitsubishi Galant. I'll look
into that right away. Actually, when I bought the truck six weeks ago I
tried to find out how long it has been since the T-belt was replaced but
couldn't.
Karl
E. Meyer
Perry" <kap...@NOSPAMcablespeed.com> wrote:
I had one of these. Its either oil to the valves or the accessory belt
tensioner. There was a known problem with this engine in that the oil ports
were too small. Try running it on Mobil 1 10w30, if the noise goes away it
was the valves. In that case just keep using Mobil 1.
Otherwise, how old & in what shape are the accessory belts? Take a look at
the tensioner.
Also, the timing belt should have been changed at 60k miles on this truck.
Karl Perry
"E. Meyer" <e.m...@ieeeNOSPAM.org> wrote in message
news:BBA3A7CA.1AB5D%e.m...@ieeeNOSPAM.org...
> I had one of these. Its either oil to the valves or the accessory belt
> tensioner. There was a known problem with this engine in that the oil
ports
> were too small. Try running it on Mobil 1 10w30, if the noise goes away
it
> was the valves. In that case just keep using Mobil 1.
>
> Otherwise, how old & in what shape are the accessory belts? Take a look
at
> the tensioner.
>
> Also, the timing belt should have been changed at 60k miles on this truck.
>
Karl