Kain
3/4 ton status
Check timing to it will affect the way it starts cold and hot
Probably. I thought they were pretty decent units. I've had one on my 76 for several years, it has manifolds though.I have a duralast, and no heat shield and I have never had any issues.
They are not long tubes though, they are like mid length ones, so maybe that is enough to keep the heat away?
Actually the new one that I put on Monday with the new heat shield is working pretty good. Today is my second day driving it without problem. I think the new heat shield may have helped it out. Knock on wood.Is it possible he has bad exhaust valve seats causing the headers to get hotter than normal? Or running rich enough that gas is burning as it's leaving ...... Just a suggestion.. duralast and vatozone stuff sucks but not usually that many units with the same issue in a row. I'd try looking from a different direction once
I have a duralast, and no heat shield and I have never had any issues.
They are not long tubes though, they are like mid length ones, so maybe that is enough to keep the heat away?


Sorry to be the grumpy old man,
But NO! I still has a lot to do with the parts that you buy!!
But no problem, I see it everyday when people look past the actual problem because they don't like what someone is saying.
Rant off.....
We rebuilt the alternator for my son's duramax yesterday. It hadn't failed, but it was original to the truck, 180K. We found the proof when we tore it apart.
Here is a picture of it running on the test bench, notice the oscilloscope on top to watch how clean the output is.
Stock stuff put out 115 amps from a 105 amp unit when cold. Cheaper than an upgrade right now.
View attachment 224816

The picture that posted above was at Western Alternator in Montrose on Tuesday.You can also look for a shop that rebuilds the OEM and you will end up with a better unit. There was one in Montrose that I used to take my stuff to. Cost a bit and you had to wait but the end result was worth it.
The picture that posted above was at Western Alternator in Montrose on Tuesday.