Replace lifter How to replace noisy lifter on 1994 Trooper with 6 cyl.

10w-30 is what you would use in winter and 10w-40 in the summer

A normal sohc 4 cyl. has 4 intake and 4 exhaust.
That motor has 8 intake valves (2 in each cyl.) and 4 exhausts.
I thought all the lifters were the same ,but if what you say is correct you need 4 intake front ,4 intake rears and the 4 exhaust,if they were all bad.

Use a stethoscope if available, or even a tree branch, and touch above lifter areas with finger over the top end and ear against finger to locate louder lifter.

ok its that a gas or diesel truck if gas there is a fluid you can add to your engine its cald liffter quite or you can also use little marval oil add a little about half of qt drive for a while see if it works problem was litle trash stuck on it if that dont work then its a bad liffter or bad rocker cap let me know if any questions

Sorry but there is no valve adjustment with hydraulic lifters - can turn the lifter upside down fill with oil - let sit for a while and then tap on the lifters to see if they make noise - if noisy replace.  Camshaft may be worn on the lobes or may have jumped timing if belt.

Marvel Mytery Oil has always been known to cure sticky lifters. Another old trick is to add a qt. of trans fluid inplace of motor oil next time you top it off. Trans fluid is very high detergent.

1989. Later models had changes to other components and fuel systems that make cross-over nearly impossible without intensive parts swapping.

No just yet before you go to all that expense and trouble. The lifter may just need cleaning. Go to Advance Auto Parts and purchase a can of Seaform Motor Treatment. This is not an oil additive. This is a fantastic product that just may clean your lifters and stop the noise. Read about it here and watch the video. You put it in the crankcase as per the instructions on the can. You can also get it at other retailers and marine supply stores. http://www.seafoamsales.com/motor-treatment/index.html

Very common problem, some 2.9L were mechanical lifters that required adjustment, others have trouble with the hydraulic liters being noisy.

Firing order is stamped on the block intake manifold or label. 4 cyl are typically 1324

From the web:
The firing order for four cylinder engines where the cylinders are in-line is 1243 or 1342.
Those are the only two possibilities I've ever found for inline four cylinder engines. In practice, it's almost always 1342, except for Ford engines which are 1243.


Take one off at a time and replace it

Do not run the wires parallel (side-by-side) for more than 6". Cross them over each other wavy-like if needed. This will prevent crossfire.

Replace Points, Plugs, Condenser, Rotor and Cap too.

Good luck!