Replaced head gaskets now I have a miss on clylinder #3

[mcbassin]

Eh, 5.3's are just bigger but they are just as simple as a 3800 at least.

Having owned 4 of them LS motors, they are my favorite things to work on.

Totally agree! I've had 5 or 6 of them myself.

ive seen this a few times with lifters that are pumped up/full of oil.....

you tighten the rockers too fast and the lifter doesn't compress so you end up shoving the valve into the piston on the holes where its at tdc.


you keep it from happening by rotating over the engine till the far left and right rockers are on base circle (valve closed, then slowly lightly snug them down letting the lifter bleed down when you start to compress the spring. once the two end rockers are snug (they are what align the rocker pedestal plate, start with them first) then you can tackle the others on closed valves. rotate crank till the rest are on the base circle, repeat.

yes we are not an interference engine, and yes you do not NEED to turn the engine over to hit base circle for tightening rockers....but you must snug them up slowly so the lifters bleed down to keep from mashing a valve.....

before installing the head you can turn the engine 30* past tdc and 4 slugs will be over an inch down in the hole while the other two are at BDC. prevents any chance of contact.

and also, tightening rockers that are on the nose of the cam lobe is a wonderfull way to make sure they are out of the correct position/alignment once you snug em down....that's why I start at the end ones (the one with the tight dia hole and the other end with the slotted hole) and work through em with em turned to base circle.... youll also help tip alignment if you hold the rocker slightly counterclockwise while at the snugging point to counter the twist imparted by tq'n the fastener.

**** like this is stuff that should be in the writeups

Very good information! Thank you.

 

[mcbassin]

 

[mcbassin]

Hey guys, I've noticed a really weird coolant issue with this engine. If I leave the car idling for an extended period of time, (like 15-20 minutes). The temperature climbs and the overflow from the coolant reservoir will puke out coolant.
The engine temp is normal driving down the road but it climbs at idle almost as though there's not enough flow through the water pump. The electric fans don't come on until it seems too hot.
I'm wondering if I have a bad thermostat?

 

[Scottydoggs]

you might need a new t stat, your year car the fans dont come on till 220 ish iirc as well. make sure both are on when its temp is hot. might not have working temp sensor or bad wires to the temp sensor.

 

[njgp]

Wow, so you have a nice running car for $1100! Very impressive.

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