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1990 Mazda B2200 p/u valve noise

Hi,

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

Reply to
Karl Perry
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Reply to
zorro

Thanks. I'll look into this.

Karl

Reply to
Karl Perry

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.

Reply to
E. Meyer

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.

Reply to
Curly

That engine has a timing belt.

Reply to
E. Meyer

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

Reply to
Karl Perry

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.

Reply to
E. Meyer

Thanks. I'll check into these.

Karl

Reply to
Karl Perry

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