I have had a coolant leak from the right rear of the engine for 8 years now. Recently, timing cover has begun leaking coolant worse than the rear corner.

So, this weekend + Mon and Tues if needed, I am going to be doing head gaskets with my original cylinder heads from my junk engine which have already been decked and cleaned and sealed. Also, timing cover gasket and oil pan gasket. While I have the timing cover off, I might as well replace the oil pump at 184000 miles as well as the timing chain.

Yes, I do have a 5/8" swivel impact socket.

I had thought about upgrading the camshaft while I have the timing cover off but it just wasn't in the budget.
Also will be upgrading to the Hayden fan clutch and Dorman fan for peace of mind.

 

How many miles have you put on the truck? Total miles? I have two with over 220k on them, still on original oil pump and timing chains. If you have used good high viscosity oil and changed it regularly neither will really need replacement.

 

What is a high viscosity oil ? And what is good ?

 

15w40 Diesel oil is the best option, but 10w40 or 20w50 is fine for most of the lower 48. 10w30 is a little light but probably acceptable with oil changes in the 3000-5000 mile range. These engines don’t build a lot of “extra” oil pressure, so the problem is thinner oils don’t offer the wear protection and they experience faster dilution and viscosity breakdown.

Lots of discussions on the Jaguar forums about worn timing chains, some have them and some don’t, one of the big issues with modern cars is the oems drop the viscosity to something like 20w to improve the fuel economy and then extend the oil change interval, you wind up with 10 or 15 wt oil that doesn’t prevent the wear like you want. The oem doesn't really care about engine life as long as it makes it out of warranty.

My daughter has a Jeep Compass with variable valve timing hydraulic lifters, all of the forum guys swear you have to run the recommended 5w20 or the engine won’t work right. Been running 15w40 for a year with no problems for a year. One of my trucks was a 1 owner when I got it and he was religious with factory oil changes (LR dealer) every 5k, 243k and runs like a top!

 

I bought the vehicle with 80000 miles and a bad engine. Bad as in the last time I cranked it it went chunk, and dropped bearings pushrods lifters and a piece of camshaft into the oil pan. I purchased a used engine and installed it. Since then, I have put about 100,000 miles on it. I have been running Rotella 15w 40 for the past 80000 miles. Since I will have the timing cover off, I am just doing this for peace of mind.

 

What are the differences between diesel and gas oil

 

Lots are different. Additive packages, friction modifiers, viscosity itself. This is a general statement, there are much much more specific info and in depth detail on the inter web.

 

Can you name a few extras that rottella has

 

Rotella contains more zddp than standard gasoline engine motor oil. Our engines are of an old design with a flat tappet valvetrain and benefit from it's anti-friction properties. zddp reduces the life of catalytic converters so it's concentration has been steadily reduced in oil over the years. I add some to my oil to boost the concentration.

 

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