96 Speedster cylinder not firing

[Bigbabcok]

I can only get 3 out of my 4 cylinders to fire. I am hoping that it is just a valve problem. Any recommendations? Also if I take it to a shop how much is it to rebuild both motors typically?

 

[grinditout]

A lot , get a compression gauge , try for a snap on brand one.

 

[Bigbabcok]

I used a cheaper compression kit, but it was getting 0. Then fired each cylinder up and they all worked 1 at a time besides that one. I would get a puff of air out the exhaust after a couple of seconds.

 

[grinditout]

all the cylinders where showing up as zero? What where the readings?

 

[Bigbabcok]

The cylinder not firing came up at 0 & the rest came up with 120 to 125.

 

[grinditout]

yeah, that one is going to be really messed up.

 

[grinditout]

pull the engine, then pop the cylinder head off, you should be able to see the damage.

 

[grinditout]

125 is probably on the low end, top ends for sure.

 

[grinditout]

new top ends show between 150 and 155 on the 720

 

[grinditout]

I do not think I would run the engines the way you described, either.

 

[Bigbabcok]

Only did it for 5 seconds at a time just to make sure. So how much is a top end rebuild typically?

 

[grinditout]

send them to dan at fullbore , look at his website for prices.
Do you have any history on the bottom ends?
That one showing zero is probably going to be wrecked < more than just a top end.

 

[Bigbabcok]

Well finally opened it up & found that the cylinder wall was grooved on the cylinder not firing. Any idea what that can be from & best way to fix? Thanks!

 

[hotrodssnova]

Well finally opened it up & found that the cylinder wall was grooved on the cylinder not firing. Any idea what that can be from & best way to fix? Thanks!

Hard to say without pictures.

 

[Upallnight]

If you remove the cylinder you can inspect the rings on the piston. Most likely one of the piston ring is cracked or broken.