ive got a spoon 421 manifold and on the flange near the head, the header pipes keep cracking,ive had it tig welded about 1500 miles ago and its done the same again.....the weld was very good and was done by a proper place so can rule out crap welding.........could it be the engine mounts, as the front seams to move about a bit off and on the throttle,and when i fitted a etd it made it better.....anyone got any ideas...?
CRACKING MANIFOLD
- Thread starter martyndc5
- Start date
sinbad
Advanced Member
- Messages
- 1,366
if the welds were good i cant see it being anything other than the engine mounts. Its probably a long shot but double check it isnt hitting anything else. I'd get the ES engine mounts anyway just to be safe. only cost ~£25 plus fitting on top.
http://wizardperformance.co.uk/index.ph ... ductId=548
http://www.performance-solution.co.uk/d ... 943.570139
http://wizardperformance.co.uk/index.ph ... ductId=548
http://www.performance-solution.co.uk/d ... 943.570139
- Messages
- 8,229
the spoon exhaust is designed to be a direct replacement for stock, and used with std mounts, uprated ones can only help.
which cylinder is the problem, is it 1 or 4 by any chance?
1 question, i have seen a couple of these crack in the past but not for a couple of years.
Where the 4 into 2 is bolted to the 2 into 1 have the std Honda spring bolts been used on the joint where cylinders 1 and 4 join?
these are critical to allow both joints to move, on the 2 cracked manifolds i have actually seen the spring bolts were not used.
which cylinder is the problem, is it 1 or 4 by any chance?
1 question, i have seen a couple of these crack in the past but not for a couple of years.
Where the 4 into 2 is bolted to the 2 into 1 have the std Honda spring bolts been used on the joint where cylinders 1 and 4 join?
these are critical to allow both joints to move, on the 2 cracked manifolds i have actually seen the spring bolts were not used.
sinbad
Advanced Member
- Messages
- 1,366
hardest one to fit is the gearbox one i believe so you may as well do the others at the same time.
tdi north told me theyve only ever fitted them with the manifold off so labour could be expnsive. they didnt seem too keen on fitting mine.
If you know a mechanic or someone mechanical minded id get there help and do it yourself.
i beleive the ep3 ones will be similar :? ,link here how to fit them:
http://www.k-series.com/tech_document.php?id=12
tdi north told me theyve only ever fitted them with the manifold off so labour could be expnsive. they didnt seem too keen on fitting mine.
If you know a mechanic or someone mechanical minded id get there help and do it yourself.
i beleive the ep3 ones will be similar :? ,link here how to fit them:
http://www.k-series.com/tech_document.php?id=12