20th Dec 2011, 19:24
I have 94 SOHC Trooper that I bought after putting 56K miles on my 92 in 2 years. I was at 150K with the new one by 96. I now have 925k on my truck.
It also ticked starting at about 300K, and I ran it until it was ready to quit.
I installed replacement factory lifters and rockers, stopping short of pulling cams and replacing cam bearings. It is ticking only lightly today, so I know it has a long way to go if the motor doesn't blow first. I believe I owe the lack of re-occurring lifter ticking to have switched back and forth between regular and synthetic oils after the new lifters.
I have put only 4 timing belts in it, 3 manual transmissions, 3 starters and 3 AC compressors.
Interestingly, never an alternator, and low oil pressure has always been present.
I tell you because I thought you people with your low mileage 94's may like to know what to expect.
It's an amazing truck, and I often wonder if Isuzu truly knows what a great truck they built. I think the world of these trucks.
18th Jan 2012, 11:03
Yes, I have a problem with oil pressure; means the motor is tired. There's this stuff called Lucas Oil Stabilizer, which is good for a car with high mileage; I use it in all my cars. I was using 10w40 oil. I'm gonna switch to 2w50 oil, maybe it'll help raise the oil pressure, and I always use super gas in it.
Need any more info, my email is firstname.lastname@example.org
24th May 2012, 14:41
It sounds like the tech did not get the timing right. Could be off a tooth. The only way to fix this is to pull the cover back off and start all over. You should not need a new belt or anything; just need the timing belt put on with all the timing marks lining up. It's pretty easy to get the belt a tooth off (out of time). The best thing to do when you get the belt on, is to rotate the motor two full times. Then before you put everything back together, start the engine and see if it's running right. That's how I always do it, and I never have to go back and do it again.
9th Oct 2012, 11:51
What I do to quiet the lifters is use 5-30 weight oil and add a quart of Reslone treatment. This helps lubricate and quiet the lifters. Works great, and continues to do the job until your next oil change. Cost is about 6 dollars, and all you need is one quart of it. Good luck!
1994 LS Trooper, 179,000 miles.
Miguel Ybarra, Del Norte, CO.
3rd Jan 2013, 23:59
Sounds like you threw a rod bearing. Drop the oil pan and check them all to see if they have been thrown or possibly spun.
2nd Mar 2015, 16:15
Did they put the air filter back in the assembly? Just a thought. Other than that, it could be the hydrostatic fan that has a sucking sound when the clutch is engaged. A giant sucking sound that doesn't cause the engine to falter is probably not vacuum.
2nd Mar 2015, 16:25
If you have the 3.2 DOHC type W engine (VIN W), I doubt it is a lifter, but the timing belt tensioner assembly. The new version has no tolerance and no adjustment. If the belt is thin as many makers seem to pride themselves with, the tensioner cylinder plunger will not make sufficient contact with the tensioner pulley and the belt won't be tight enough. When new there should be about 1/4 inch between the tensioner pulley assembly and the face of the hydraulic tensioner. I bet yours has 1/2 inch. That means belt flap and tick tick tick most noticeably around the front of the engine on the passenger side. There is no adjustment for this. It is possible a thicker belt will help. I couldn't find one so I machined elongated holes in the tensioner hydraulic assembly and moved it 1/4 inch closer to the tensioner pulley assembly. Locktite and JB weld finished the job to give the part the same support it had when new. It is a pain in the rear to do this and shouldn't have to be done, but EVERY V6 type W engine Trooper with more than a few miles on it has this problem. Even the factory parts won't cure it if you get the newly manufactured belt rather than the original thick version from a dealer who is selling old original parts... I tried before I went to the extreme.