Weld repair on cracked cylinder head - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members

Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

LinkBack Thread Tools Search this Thread
Old 07-26-2016, 07:33 PM   #1
Junior Member
Thread Starter
iTrader: (3)
Join Date: Oct 2010
Posts: 198
Total Cats: 2
Default Weld repair on cracked cylinder head

Hey guys, im looking for some advice and i apologize if this is the wrong section and im sorry about the wall of text, I have no idea how to format this but i really need some help deciding what to do with my car. My MSM seems to have a crack in the cylinder head because i have found an exhaust stud leaking coolant. I recently "blew" the OEM radiator and replaced it with a spectra autozone one. Worked fine for a week however today i noticed even the new one seems to have been over-pressurized during a drive and it sprayed some out of the sides where the aluminium is joined to the plastic. My amateur theory is that it is getting air in the cylinder head after it cools down and that is causing problems. Ive been monitoring the coolant temps with a phone app and it has not overheated. I have access to a ac/dc welder at my job and i was curious if it is possible to disassemble the head and attempt to lay down some aluminium filler rod wherever the crack is. Do you guys think id be better off tracking down a used head/motor doing a resurface and slapping it on there?

Thanks for any advice,
samwu8k is offline   Reply With Quote
Old 07-26-2016, 10:33 PM   #2
Tweaking Enginerd
iTrader: (2)
Join Date: Mar 2013
Location: Boulder, CO
Posts: 444
Total Cats: 33

If it was me, I wouldn't bother welding it. I believe the msm uses a bp4w, which pops up here pretty regularly. If you run a vvt capable stand-alone then the vvt is the way to go.

edit: noticed your sig has vvt w/ms2, so there you go.
Ted75zcar is offline   Reply With Quote
Old 07-27-2016, 12:27 AM   #3
Junior Member
iTrader: (6)
Join Date: Dec 2008
Location: Boulder, CO
Posts: 291
Total Cats: 7

Shouldn't the radiator cap (16 lbs?) bleed off the pressure before 'blowing' anything?

ftjandra is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
FS: Adaptronic Select PnP ECU for 01-05, including MSM deliverator Miata parts for sale/trade 6 08-09-2016 02:36 PM
Mounted a curb, need advice :( magnoon General Miata Chat 9 07-18-2016 05:09 AM
Turbo selection advice... Antidavid DIY Turbo Discussion 21 05-07-2016 01:22 PM
MSM w/ MS3 not stating after winter storage tuckermon MEGAsquirt 7 05-06-2016 10:36 AM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -4. The time now is 11:48 AM.