Car trouble (1994 toyota supra)

[HK3-]

How many miles are on the vehicle? (don't think I saw that posted.)

[Whipper Snapper]

Originally Posted by HK3-

How many miles are on the vehicle? (don't think I saw that posted.)

Good question. It's a higher mileage vehicle. I believe it's sitting around 157,000 at the moment.

[HK3-]

Originally Posted by Tecnorobo

Good question. It's a higher mileage vehicle. I believe it's sitting around 157,000 at the moment.

Ok. Has the timing belt ever been changed?

I ask because if the belt IS worn out you could be hearing a valve tapping on the top of a piston. If this is the case, one more tooth out and your entire head will need to be reworked. See, timing is very critical in these types of motors. As the timing belt stretches it begins to hop or skip making the timing become more and more out of synch. The last straw is when the piston is at the top of the stroke and the valve(s) are completely open which causes total havoc.

I will make a call right now to a buddy and ask what a common problem is with those motors and report back.

[HK3-]

Says they are common for burning up exhaust valves. He said to do a compression check on each cylinder. Black smoke is fuel.

If compression checks out, check the turbos.

[Whipper Snapper]

Originally Posted by HK3-

Says they are common for burning up exhaust valves. He said to do a compression check on each cylinder. Black smoke is fuel.

If compression checks out, check the turbos.

Thanks for calling your buddy.
One thing to note is this motor is the Naturally Aspirated version...
So no turbos