C CJDan New member Nov 25, 2011 #1 Have an 89 yj, I was never told if I have a 4.0 or a 4.2 when I bought it...the guy did not know much about it and I am currently replacing the timing chain.
Have an 89 yj, I was never told if I have a 4.0 or a 4.2 when I bought it...the guy did not know much about it and I am currently replacing the timing chain.
L LGR New member Nov 25, 2011 #2 In wranglers they used 4.2 up to 1990 and switched in 91 to the 4.0. If you got a carb its a 4.2. 4.0s had fuel injection.
In wranglers they used 4.2 up to 1990 and switched in 91 to the 4.0. If you got a carb its a 4.2. 4.0s had fuel injection.
superj Active member Nov 25, 2011 #3 unless its been changed. the numbers on the block are on the driver's side, under hte intake, back by the firewall. my 87 has a 99 block in it
unless its been changed. the numbers on the block are on the driver's side, under hte intake, back by the firewall. my 87 has a 99 block in it
