how much should i drill in the head? Is there any passage for it, or will it serve just as a hole for coolant?
Water jacket in back of head?
- Thread starter TEMPEST
- Start date
On mine cylinder #2 failed with a BHG. I would like to see some data supporting cyl #6 failing more often. All I've seen so far is comments like the one above with no supporting data. The amount of exhaust flow is small in the EGR circuit so I don't see how it has any significant impact on the thermal load of the head.
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All the supporting data you can shake a stick at won't help my particular head. Which by the way has a longitudinal warp of .008 (not happy) as I stated...my head has severe pitting. probably as deep as .100. So it's either drill it or fill it.
With that much warp it probably got very hot at some point. Do a hardness test before investing any more money in it. Also sounds like the coolant wasn't maintained, so another reason to get rid of it.
ViR2 said:
I have heard about 10mm down but I just had my mechanist do it when he took the engine for my build.
The number six cylinder is alot hotter then the other cylinders because it's in the back, coolant gets to it last, and its surrounded more then the others with exhaust heat.
I was wrong by stating that the #6 cylinder is the one that DOES blow more often. What I meant to say was it is the more likely cylinder to blow because of heat then the others. Boost is another story.
3p141592654 said:
agreed with 2p.
out of all the motor with bhg failure that I have personally seen. They most failed between #2 and #3. Never seen a #6 be taken out especially towards the firewall.
The #2-#3 area is where mine is warped most. Any differences between the nNA and turbo head? I may have a spare.
basically. one of the cams is different (do a quick search, because this is an important skill to knowTEMPEST said:
) but it wont affect anything really.
Using the NA intake cam will only shift the powerband down to a little lower RPMs, not something I would really recomend on a turbo car.
So I should just use the cams from the turbo head...That's a no brainer, provided the head I'm going to remove is in better shape.