Corg

I have a 1986 jeep cherokee with only 120000 on it it has one ding in it a very exceptional clean vehicle unfortunately it has a loud bang in, i believe the top end i have ran it momnetarily and plan to tear into the top to see whats going on I am looking for roller rockers and how much trouble it would be to install them and if i need any other upgrades such as push rods while in there any suggestions appreciated

jedijeb

What motor does it have, the 4 cylinder or the V6?

Corg

Thanks for the reply I am new here and tried a search for info, It has the chevy v6 2.8 liter in it i am considering upgrades to engine and have researched engine oil as the removal of Zdpp was new info to me Thanks again

jedijeb

https://www.cherokeeforum.com/f2/rot...essing-188168/

If you are worried about oil, check out this thread, it is what many use here and have good results.

I don't know much about the V6 other than most will say to upgrade it, but even the 2.5L I4 from that year is considered an upgrade as they are much more durable. Another option many go with is the 3.8L V6 (or 3.6L I can't remember for certain which one is the same), I believe it requires very little in the way of adapters.

Corg

Thanks again .
Yes have seen threads on putting in 3,2 etc not interested in the whole fuel injection thing. I will keep the stock carb etc probably on it. Was wondering about upgrades for the 2.8 as it will be a sometime wheeler and mostly snow vehicle for my daughter ,we live in colorado.

cruiser54

3.4 out of GM cars. Easy.

Corg

Yes I am looking at cost verses benefit of just upgrading cam roller etc on the 2.8 verses having to get a donor vehicle for a 3.2 etc....Thanks for the reply

jedijeb

Shouldn't need a donor vehicle for the engine, should be able to find one at a junkyard or on eBay or CL.

Not sure you will find much more than stock replacement parts for any of these engines. The one part I know to look for for either the 2.8 or the 2.5 is the Weber replacement carb from Redline. http://www.webercarbsdirect.com/Carburetor-Conversion-Kits-s/25.htm?gclid=CL7N1YbozbQCFQ45nAodOm0ACQ

Look under GM S-10/Blazer to find the 2.8*

You might be able to find a mild overgrind on the cam, or some headers, but the weakness in the 2.8 was its lack of durability so not so many performance parts were designed for it I would imagine. The carb upgrade to Weber though would be helpful since it does away with the electronics on the stock carb which can give a lot of problems.

Corg

Thanks for the replies I am sure i will have more qeustions when itear into the engine to see what is making the kknocking noise .....all is appreciated

andrewmp6

Whats the oil look like is any metal in it?Or pull a valve cover do you see a lot of gunk built up in it.