Part 15: Repairing The Transmission Tunnel - My 76 Mazda RX-5 Cosmo Restoration

Happy Friday everyone! It's been a little while since my last video as I've been busy with beginning-of-season related activities: built a new air compressor for the shop, put a new diff in my RX-7 and helped someone else with an engine installation. It's taken a while to edit episode 15 (the actual work was completed in March) but it's finally here! In part 15, I repair the rust damaged areas of the transmission tunnel discovered during blasting. The sheet metal surrounding the shifter hole and parking brake handle area is cut out, patch panels are made and then welded into place. Also a cracked driver side seat mount is repaired. Sheet metal work is time consuming though not necessarily difficult and this is only a little work of much to come. Included in this episode: cutting out rusted metal, making templates, cutting patch panels, forming patch panels, welding in patch panels, blasting rusty parts, repairing damaged brackets, removing spot welds and replacing, lots of grinding.

Category:

Autos & Vehicles

Tags:

• mazda
• rx-5
• cosmo
• ap
• restoration
• rebuild
• modding
• rotary
• wankel
• engine
• custom
• 13B
• 12A
• 20B
• media
• glass
• bead
• sand
• blasting
• patch
• panels
• shifter
• hole
• transmission
• tunnel
• parking
• brake
• bracket
• cable
• seat
• mount
• welding
• spot
• drilling
• weld
• through
• zinc
• rich
• primer
• sheet
• metal
• grinding
• floor
• repair
• mig
• rx2
• rx3
• rx4
• rx7
• rx8

[JMG8686]

@aaroncake sorry my engine don't have all those misc parts ""just Carter and timing cover"" is any way i can tell if is s4 or s5!!! Don't have manifolds,fuel injectors,intakes,and the oil metering pump is not in the timing cover!! so don't know if is electric or mechanic

[aaroncake]

@JMG8686 At this point it would be hard to tell unless you could recognize the differences. For example, the S5 rear iron has a much thicker dowel casting around the oil filter. The front iron also has a larger front cover o-ring boss, but you will also find those on S4. I can't think of anymore external differences. Oh, look through the exhaust ports. If the bowels of the rotors are machined, it is likely S5. S4 are rough cast.

[JMG8686]

@aaroncake i got my turbo II swap ready!!! thanks 4 your help!!! but now I have a new Qs? i got a block only how can I tell if is s4 or s5?

[aaroncake]

@JMG8686 S5 has an electronic metering oil pump, S4 is mechanical with a rod to the throttle body. The S4 turbo has two actuators, the S5 has one. Those are about the only most obvious external differences. Oh, also the casting around the upper rear dowel on the S5 is much thicker than S4. S5 engines also have high impedance injectors with round connectors as opposed to the S4 square connectors.

[rotorrollaz]

hey man im absolutly loving what your doing to this rx5 cosmo.... and i cannot wait till it is all finished,:D

but may i ask... HOW LONG UNTILL PART 16 ! haha its been quite a while.

[aaroncake]

@rotorrollaz Part 16 was posted Sunday (Jun. 19th) morning.

[tsherwoodrzero]

@JMG8686 What Aaron Cake is referring to is the Front Cover. Given how parts are easily swapped on a rotary engine, there are only a few ways to determine what you have. First clue would be the OMP opening on the front cover. S4 has 2 bolts, S5 has 3. This tells you what the front cover is. Also look at the flywheel's block side. You'll find the ECU number stamped on it (318 for S4T2, 370 for S5T2). For more info, check out Mazdatrix's FAQs

[Popz1992]

Dude ur a genius

Uve inspired me to work harder in life With ur own meticulous work ethic

[FinnsterW]

Will this car just be restored or more of a rustomod? +1 for minny vice locks :D

[FinnsterW]

Will this car just be restored or more of a rustomod? +1 for minny vice locks :D

[JMG8686]

@aaroncake i just want to thank you 4 your help, i find out the engine is s/4 thanks!!!

[cbkidder]

I'm really impressed with how thorough you are.