It has reverse flow tho so it cools the heads first

Old comment, so you may have heard the same thing by now, but I've heard that the ignition module supposedly gets even hotter than the cylinder head, and the cylinder head with coolant running through it was thus the best option at the time. Many failures likely occur from the module overheating from improper thermal pasting. Because thermal paste is a computer thing, not an automotive thing, and ACDelco provides an inadequate amount of thermal paste with replacement modules, besides.

​@@frikyouall So what's the best stuff to use instead of thermal paste?

@@GORILLA_PIMP The thermal paste ACDelco uses seems to be a ceramic paste. I usually trust Arctic when it comes to thermal paste, and the ceramique I used seems to be holding up. Had enough for both plate sides, too. A lot of guys trusted hi-temp grease or other lubes. These definitely cause failures. I would not recommend them.

@@frikyouall Oh you mean ARCTIC MX 4 THERMAL PASTE? Wow i actually have some of that I just looked an it says it's NON METALLIC But it's also not ceramic either You think it'll be ok to use?

Damn they all should have been made like this

Main I been pulling hair trying to figure. This is big help

I work on a lot of Corvettes, and have seen loads of LT1s go 28-30 years on the OEM factory fitted distributor and they drive in just fine. It is more often the bearing that kills them, and that is very hard to find now. The original Mitsubishi sensor does not fail, at least i'm yet to see one fail in 25 years of doing this.

Still driving it or...?

Yep, it is a load of shit really, even the earlier non vented units on Corvettes will last 30 years without being touched.

Still need the optical sensor to work, and that is what most often fails on cheap chinese distributors. The factory OEM units did not simply fail, and could always be rebuilt.

@@CaseTheCorvetteMan it can be done with or without, only need the optical sensor if youre keeping the original pcm/management. Believe i made this comment out of frustration when i was having a hard time finding the OEM Mitsubishi sensor that doesn’t seem to be produced anymore, to rebuild mine. most optispark reproductions switched to a knock-off sensor that often dont last or even work right out of the box… ive bought a parts store opti that was dead out of the box. so servicing an opti the right way with an OEM optical sensor has gotten harder than it used to be.

@@JoeliusZ28 i know, i rebuild them.

Check your fuel injectors or ignition coil driver module

They used it because it was perfectly fine and reliable. I know they are, i've worked on these a long time. It is the cheap chinese replacements that are unreliable, and any distributor is going to be rooted if you soak it in water. I'm yet to see an OEM factory unit i couldn't clean up and rebuild, and have it go another few years before replacing the cap and rotor.

Got sued by who? I'm guessing in Detroit?

Just cranks and won't start or what? Thats what mine is doing

Come to find out it was a fuel problem the whole time test fuel injectors only 2 work if yours crank won't start try putting gas in throttle body of it fires it fuel issue if not could be optispark

@@jacobking4106 check the ground wire on firewall

I'ma going thru that now....im not showing any codes car starts fine stumbles when I accelerate but smooth out I changed plugs..I checked wire it has bulid up in the wires...a shop wants $270 to change wires...I might let them change them cause it's a real bitch... from what im hearing

smart idea placing it behind the water pump XD

So it was "hogwash" at the car wash?

Are those gears v

Simple solution. Tap the water pump weep hole and install a barbed fitting. Fit a hose and route it away from the opti so if it die by chance start to leak it will leak away from the opti. Problem solved.

89camarocragerSS chuck would say that haha!

😄😃😂😜 Very True!

mine went bad at around 40k in my 94 z28.

working shlub Mine at 50k on a 97SS.

was until the engineers got a hold of it......

Ken Landry xd

I got 156,000 on a stock opti before

@@my95buick Some people like myself aren’t as lucky. If your water pump doesn’t fail and leak all over it then it’s very possible to get that type of mileage out of one like you did.

@@nicotoscani8270 even still it's not a hard job on a b body. F body not so much lol

Been there, done that. Brand new MSD opti installed, new water pump, then installed superchager, intercooler, and all related plumbing.. and guess what? MSD opti was bad out of the box... had to redo entire job. Is yours still OK?

BeulahLips Same thing with me, MSD opti was leaking right high voltage right out out of the box and sparking to ground right around the leads. I bought the whole MSD kit which included new wires too. In frustration I purchased the cheapest Opti I could find from a local big box auto parts store, they had it in stock and it has been working perfectly for a few years.

+john depietro wow I thought msd was really good they say so most people

There is. I have a 96 and can't tell you step by step but I have seen people do this. I know I am late here but maybe can help someone. Theres conversion kits and even DIY where you can drill. Be honest with yourself after watching this...and get the good conversion kit. Gives yourself a better chance. It's a distributor so expensive part.

How’s that Petris holding up?

Downright sinister.

Love ur videos man I always see ur videos when I’m looking for lt1 videos but yea the opti does suck I got a electric water pump hoping that would help from any leaking their and a msd opti and ignition set up it’s lasted a good 5-6 years but that should be normal for most car parts lol

@@ThatNoFbody-ch9ky thank you for watching

Fr these guys in the lab coats are creepy asf

Doesn't last long enough to need service?

+Mr Woody , Yes, my original Opti-Spark only went 88k. Replacement left me stranded in a parking lot after 12k miles.

im on my original 197k miles, first cap and rotor at 196k. that's 24 years original opti. the disk was cleaner than a canned air. my mind was blown, it was owned by a 90 year old couple before me. 94 roadie wagon. It had Packard electronics wires on it!

They all got their issues. Worked on both, each have flaws. Like the TFI Module Ford buries at the bottom requiring a distributor pull to change it out on some cars. At least replacing OptiCrap, it has the pin so replacing it timing isn't affected at all.

I've never had to pull a dizzy to replace it honestly. I'd prefer HEI over optispark any day, or better still, points and condenser

Oh of course HEI was better, but point was all manufacturers have their flaws. On paper Opti was a great design. The Japanese used it no issue, them GM cheapened it out and it failed. There are conversion kits that remove the high voltage component from Opti thus improving reliability. But I've had many fun times working on Fords where the distributor is buried like a Ford Ranger or even the 4 cylinder Fox Mustangs. In the end, I prefer anything with distributorless ignition.

Electronic ignition is nice (when all is working properly**) After 14 years of being a technician in the field, I want simplicity, I think I'll build my next truck, Holley 4bbl, mechanical secondaries, maybe retrofit an MSD distributor with some form of electronic ignition to it for less maintenance, but I'm beyond tired of dealing with fuel injection and idiot lights LOL

do not buy an lt1 unless you are a halfway decent mechanic and have a garage. its great power for cheap money but you will be under the hood.

You sghould try to replace it on a 93 -96 C4 Vette..... Its a nightmare, Im in the soup sandwich right now.

Yeah, what we need this days is more guys with tatoos, beenies, and cigarettes lecturing us.

BeulahLips Yes definitely

+asssface2000 ha ha

they are not that hard to change just time consuming...the aftermarket stepped up with better sealed ones.

Not hard to replace,.....compared to what? A regular distributor can be changed with one hand tied behind your back, the Opticrap,.... er I mean Optispark,.... will take you a day....if everything goes right.

Looool right!!