Impromptu Overhaul

[GregH]

Getting the shop to drill and tap the 3/4" NPT on the transmission case. The description on the tech tip is 5.6" from the rear face of aft housing - would that be parallel to the oil pan face or parallel to the cover plate for the transmission?

Any one have a sketch from face on that I can share with the shop?



NB: In case any on is confused from earlier today- I edited out a pic and question asked due to them being out in left field.

[jcwright]

Hello Greg.

Here is a link to a file with a photo and measurements of an A4 that may be helpful:

https://drive.google.com/file/d/1wBU...ew?usp=sharing

I've marked the known distance from the centers of the mounting holes and extrapolated what the "5.6" appears to refer to. Others who have made this modification hopefully will correct me if I'm wrong.

Best regards,

jack.

[GregH]

Alrighty, getting my block back from the shop in 2 weeks!

I was informed today (sorry no pic yet) that when they were decking (is that the right term?) the block, they discovered a small crack on either side of a water jacket flow hole. They did the stitching of it and say it will be fine. I only came across this stitching thing about a month ago on here. This stitching will prevent any water seeping through the crack?

Though we don't use sealant with the head gasket, should I spread some along the length of the crack anyways?

[Surcouf]

Originally Posted by GregH

Alrighty, getting my block back from the shop in 2 weeks!

I was informed today (sorry no pic yet) that when they were decking (is that the right term?) the block, they discovered a small crack on either side of a water jacket flow hole. They did the stitching of it and say it will be fine. I only came across this stitching thing about a month ago on here. This stitching will prevent any water seeping through the crack?

Though we don't use sealant with the head gasket, should I spread some along the length of the crack anyways?

if it is the stitching that was discussed a couples times on other threads in the past 2 years, there is in fact no more crack: they basically drill the whole crack out and fill the holes with these "special screws". Supposed to be leak-proof...

See previous thread with discussion on technique on Launchpad McQ engine
https://www.moyermarineforum.com/for...itching&page=4

amazing video here
https://www.youtube.com/watch?v=Pq0wfU4ZaKk

[ronstory]

Those cracks at the water passages are common on flat head engines. When I discovered those on my engine, the machine shop didn't miss a beat with lively commentary, "Those cracks are superficial, don't worry about it since you are gonna use sealant on the studs, unless you are dumb... and you don't *look* dumb."

... but the best quote was "If this was a Ford flathead, those types of cracks have a factory part number".

[GregH]

Originally Posted by ronstory

Those cracks at the water passages are common on flat head engines. When I discovered those on my engine, the machine shop didn't miss a beat with lively commentary, "Those cracks are superficial, don't worry about it since you are gonna use sealant on the studs, unless you are dumb... and you don't *look* dumb."

... but the best quote was "If this was a Ford flathead, those types of cracks have a factory part number".

HA!

Those are great soundbites!

[GregH]

Originally Posted by Surcouf

if it is the stitching that was discussed a couples times on other threads in the past 2 years, there is in fact no more crack: they basically drill the whole crack out and fill the holes with these "special screws". Supposed to be leak-proof...

See previous thread with discussion on technique on Launchpad McQ engine
https://www.moyermarineforum.com/for...itching&page=4

amazing video here
https://www.youtube.com/watch?v=Pq0wfU4ZaKk

Yep, those are the discussions I was referring to. Always learnin!