Cracked DS header

[oc192]

Will a cracked driver's side header cause high BLMs and 10 in of vacuum at idle?

Thanks

 

[QUIP'6']

Will a cracked driver's side header cause high BLMs and 10 in of vacuum at idle?

Thanks

yes it will cause high blm's as far as the vacuum dont know. it could be low because the motor is loading up with fuel.

 

[Onalky87]

In regards to blms... At what number should I start to be concerned about a header leak?

 

[notacarlo]

You have identified a leak? Fix the leak, worry about BLM's later.

 

[QUIP'6']

In regards to blms... At what number should I start to be concerned about a header leak?

128 plus 10. but a vacuum leak will also cause the motor to run lean and cause a rise in blm's

 

[turbobooster]

ur vacuum shouldnt b affected i had a major crack on the ds header and my vacuum remained the same before and after i welded the crack i would definitely fix that leak though

 

[83ttypecooled]

Hi,
As said before, you should fix the leak, but I doubt there will be major mixture changes as a result of any scavanged outside air.

 

[1fast6]

ur vacuum shouldnt b affected i had a major crack on the ds header and my vacuum remained the same before and after i welded the crack i would definitely fix that leak though

what he said. Crack in the header will reduce boost and increase boost lag. shouldn't effect vac.

 

[notacarlo]

WIndmil has one for sale that has been repaired for $15+shipping.

http://www.turbobuick.com/forums/parts-wanted/327897-drivers-side-stock-header.html

The op in this thread indicated that he did not want a repaired header, so no toes stepped on.

 

[BuickMike]

Don,

You should get some pics and buy that header if it looks good. I had a badly cracked header for awhile and my BLM's were fine. It might raise them a little, but not to 150.