96 Buick Roadmaster new opti vacuum harness

It's your engine, transmission, driveline
Post Reply
kevm14
Posts: 13936
Joined: Wed Oct 23, 2013 10:28 pm

96 Buick Roadmaster new opti vacuum harness

Post by kevm14 » Mon Mar 25, 2019 7:41 am

Just a little tricky in terms of routing but was able to do it on ramps without removing anything but the coil plug. Then I was able to remove the old harness and shove the new one down. Under the car I connected to the opti.

Before I did that, I blew some electronics cleaner in there. Not sure if that did anything. I also blew air at each port and it blew out the other port with no apparent restriction.

However, after replacement, I still do not have vacuum at the intake boot side. This must mean that the opti itself is no longer sealed. I may blast some stuff down the vacuum line like WD-40 and see what happens. Or do nothing. I will have to commute in it soon and see if the light misfire up the bridge in 4th lockup is still there. Drove it around yesterday and everything felt good to me...

kevm14
Posts: 13936
Joined: Wed Oct 23, 2013 10:28 pm

Re: 96 Buick Roadmaster new opti vacuum harness

Post by kevm14 » Mon Mar 25, 2019 7:44 am

Pics.
20190324_135214.jpg
20190324_135222.jpg
20190324_135311.jpg
20190324_135325.jpg

kevm14
Posts: 13936
Joined: Wed Oct 23, 2013 10:28 pm

Re: 96 Buick Roadmaster new opti vacuum harness

Post by kevm14 » Tue Mar 26, 2019 5:42 am

Drove fine into work...

Even if the opti is hanging in there, there is definitely an oil leak of some kind in the front of the engine. I don't think it is the front main seal. It COULD be the oil pan. But more likely it is either the opti or water pump seal (which are the two other seals that go through the timing cover). So an R&R of those with new seals would be advised and I can't imagine I wouldn't replace both the WP and opti. I just don't want to do any of that since I kind of hear Bill in the back of my mind say "don't put money into the LT1 if you really are going to replace it." Not like I have any plans though.

Post Reply