These boards rock! I am new at this Mistu game and hope my rambling is humorous instead of annoying?
Here goes!
I currently have a 1988 4x4 Raider 4cyl G54B 100K mi. I purchased this vehicle with a burned out exhaust valve in the head. The previous owner had replaced the OEM head with one from Clearwater, FL at 50K with one without the jet valves.
Pulled the head and valve was burnt and the melt-away tab was gone so (OVER HEATED Obviously), Clearwater, FL would not warranty. So, took to local machine shop that was familiar with 2.6 and had head rebuilt.
Reinstalled head and fired her up ran fine for a day and spun a main. <img src="/forums/images/graemlins/confused.gif" alt="" />
Pulled engine, Dipped, Cleaned & painted block & replaced all bearings and went .30 on pistons and had crank repaired. Went with Castrol Dino oil 10W30 Replaced Oil Pump, guides, and did a balance shaft bypass kit. Replaced oil pressure gauge and temp gauge with Mechanical.
Got her fired up and ran good through break in other than a little bit of rattle at cold start. (Which from the boards here is normal for many.
Then a week into it, noticed a tapping coming from rockers or lifters. (Unfortunately I did not replace lifters) Popped off cover and found that exhaust side lifter 1 was completely collapsed. Replaced it and checked others.
Note: Did notice a small hairline crack in the threads of the rocker assembly, at the point where the front head cover bolt tightens in. Looks as if it doesn't go all the way down.
Started her up and drove fine for 20 miles started tapping again. Grrrr... Got to work came out end of day started no tapping until temp got normal started tapping.
So, Oil pressure gauge was at 100 at cold and gradually decreased down into the 20's. Upon acceleration it would rise into the 30-40's. A week later tapping on and off, oil pressure gauge started leaking all up in the dash dripping
down everywhere!
<img src="/forums/images/graemlins/scared.gif" alt="" />
So, removal of oil pressure gauge found that it was faulty! Reinstalled the OEM on the wrong side and blew it up. No gauge for a week, until replacement with new SUN this weekend. Same thing 100 at cold 20-30's at temp. Tapping and rattle at start persists. Then last night driving home [email]F@%king[/email] plastic oil line ruptured in engine compartment and oil left engine. Luckily I had electric oil sending unit and disconnected before damage.
<img src="/forums/images/graemlins/kewl.gif" alt="" />
Went and got copper line and fixed that SH*t for good.
So, here is where I am in need of assistance.
1) Has the balance shaft bypass affected my oil pressure? using 10W30 should I go to a 50 weight oil.
2) does anyone know if the rocker shaft assembly has any oil journals that would be affected by small crack at the point where the front head cover bolt tightens in?
Looking forward to hearing your opinions and speculations!
ShOOter
<img src="/forums/images/graemlins/zombie.gif" alt="" />
