https://ibb.co/f03SZVv
Click on the link, the diagram is for starter motor. Will the starter motor crank the engine? If it cranks good but won't start, make sure battery has a full charge and connections all good. Have a helper crank it while you check for spark at the plugs. Spark everywhere, use a gage and check proper fuel pressure. Check fuel injector pulse. Any applicable trouble codes. Those are the basic checks, in my opinion.
If your battery is discharging while the van is parked up, there's 3 general causes:
The battery itself is failing and cannot hold a charge. replacement is the only option.
There is a fault within the alternator - either the alternator is not charging or it is allowing the battery to drain because the diodes (the rectifier in the alternator) have failed.
There's a parasitic drain of power somewhere. Something is remaining 'live' when the van is parked up - and draining the battery.
I have worked on many Astro vans and most have a 4.3 litre V-6 engine. So I will give you the torque specs and sequence for that engine. If you have another one. Just let me know which one you have.
There are 13 bolts in each cyl. head. If you can see the bolts and notice from front to back there are 3 rows of bolts. On the outside closest to the spark plug there are 6 bolts in this row.There are 4 bolts in the middle row and 3 in the top row. We can number these bolts by which ones you torque first to last. Okay starting with the bottom row the first one towards the front is # 11 the next is # 7 then #3--#2--#6--#10. The middle row starting in front.. #12--#4--#1--#13 Then the top 3 from front to back are #8--#5--#9
I hope this is easy to understand. I have some more tips for you if you want. Such as if you use a metal head gasket, make sure you use some special sealant such as K&W copper coat. On both sides before installation. Also use some Permatex no. 2 on the threads of the head bolts. Torque all the bolts in sequence to 22 ft. pounds. Then on the long bolts an additional 75 degrees... on the medium length bolts...an additional 65 degrees... on the short ones... 55 degrees...I will tell you a secret no one seems to realize. Any bolt you torque and then put another degree turn on are STRETCH bolts. You should never reuse these bolts if they have been used. New bolts are supposed to be used. I know lots of people reuse the old bolts and have luck doing so. But why risk it. Do it right every time and you never need to worry. (as much) Good luck my friend and let me know how it turns out and if I can be of any other service.
Look above the alternator. Follow that wiring harness towards the back. There will be a couple of connectors emerging from it. Should be behind the coil. It plugs in from the side, NOT from the top down.
Is it tite..sounds like a vacuum leak stil..it comes w instructions. There cud b a leak somewhere else on the engine. Disconnect batt a few and see if clears or unplug computer and clean that area
You still have a leak somewhere! It could be the Head Gasket/Warped Head, Intake Gasket, Timing Cover. Have a Mechanic look at this before you cause severe and costly damage.
these bearing are adjusted with shim packs if you have never worked on a differential before you really need to bring it to a experienced shop due to factory specialized service tools needed for proper repair you will need a bearing press, a micrometer , a dial indicator , and a pinion depth gauge and specialized knowledge on the usage of these tools
