VW air cooled oil pressure relief valves and oil pumps

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OEM quality pressure relief valve kit www.cbperforma...
AN fitting oil hose kit on amazon amzn.to/3St5XFM -
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breather hose amzn.to/48nWYff

[@ReeHernandez-z8z]

I had a 1600 fitted with AA slip in thick wall 88s. Shop mechanic said i had a tired 40 hp and my oil pump was a dinosaur. I never had oil pressure issues before! He handed me an oil filter adapter some hose and clamps in additin to fitting a 30 mm cb in out pump and said good luck. Nothing but problems! I have not been able to drive my car up any hill without overheating and having an insane amount of internal case pressure. In addition to blown rear main seal, and blown out sand seals despite breather kits increased in size 2x now it still a nightmare. I really want to go back to stock but cant see a downside to running an aux filter. I hate lines going by j tubes and not being an fitted steel braid but im broke! Really hoping the 26 from cb helps me reduce mess created from oil mist vapor pressure issues. Bigger is not better imho. Be wary who you have work on your engines!! Thanks for your videos!!

[@VolksStokes]

O! Oh! I put high pressure empi pistons and springs on both sides in my old 1600 DP engine. But i'm glad i left the oil pump as stock. It did solve the oil pressure issue. Never seen the low oil warning light since! 😅

[@harijo4958]

Super awesome video! Just did the cb performance relief piston and springs. Unfortunately the new pistons from cb came scuffed. I tried to buff it out as to not change the diameter but I could still feel it with my nail. Decided to run the old pistons since they weren’t too worn. Moral of the story… double check your new parts!

[@amundsen575]

from the book 72 and later dual relief case. pressure control spring loaded 26mm 3.8-4.4 lbs , pressure relief spring loaded 39mm 15-19.4 lbs

[@rickstine7107]

Im with you on pump size, 26mm max is all I ever run too. 👍👍👍

[@Mikefngarage]

I think as long as your a reasonable driver they should be fine. Revving it up all the time and causing wear maybe get a 30 to make up for the wear. Warm it up properly and start it without the coil wire when it is sitting for a while. these things all help.

[@DIY_Semi-Pro]

@@Mikefngarage that's good information for sure, that's for sharing your knowledge 👍

[@zacharysawyer6241]

I’m glad to hear you say you have all that pressure on your filter and cooler with a 26 mm stock pump. I’ve been asking people that as I’ve been rebuilding my 1600 for my sand rail and nobody has answer but the rail already has the cooler and filter set up. Nobody would give me an answer. That’s good to hear

[@stephencarr7173]

Thanks Mike. Best explanation I've seen yet on the oil system. Wish I could give you 20 thumbs.

[@jamescandelaria4840]

Stated at 9:35, "Hopefully that spring tension is as good as original . . . You don't want it to be too much, you don't want it to be too little." What does this mean when you are trying to control oil pressure at RPM and idle? There is a spring tension specification in the Volkswagen manual under the Engine section, page 35 for Type 1 and page 30 for Type 2. Installing each of these springs should never be guess work. There is a lot of spring tension variation even among new springs. Spring tension is measured when the spring is compressed to the specified loaded length. To do this will require a scale on the drill press table. Set the depth control on the drill press to the specified spring loaded length above the scale surface. Compress the spring to the loaded length then observe and record the scale force. Install springs to your liking then observe their performance. Swap them out as necessary to adjust for desired performance. Read my tech paper published on The Samba - Technical, Miscellaneous, titled "Measuring Oil Pressure & Oil Cooler Bypass Spring Tension "

[@martyp7134]

In the sixties on German rebuilt Volkswagen engines the oil pressure pistons were selective fit My Late father was a Volkswagen mechanic at Volkswagen dealership he always keep them the piston with that case they had trouble sticking and blowing the oil cooler apart.

[@jimmywilkinson9190]

Hey Mike ! on my old engine I had a Melling cast iron 34 mm dish cam pump ? negative effect it was shearing the 4 rivets ..... I guess it in the winter was hard to turn until it warmed up . positive effect was at 92,000 miles had 40 lbs oil pressure hot at idle . I still considered the engine blew ( it was knocking ) ...

[@OwhyeeVdub]

I've been running this 26 for a bit now with a external oil filter. It works just fine. But on my other car it has a full flow case with an external oil filter. And that one has an old deno pump thats huge. Both seem to work fine in there applications.

[@dillyd3488]

I've dealt with that factory oversized bore/piston thing lol. I like the CB performanced keyed maxi pumps.

[@jonathanl4691]

I was considering the CB maxi pump as an upgrade to my current pump. As I would like to get rid of the oil weep caused from cast iron to aluminum case.

[@jonathanl4691]

I run stock springs with a high volume Melling iron pump. I run 7+ qts of oil, Derale cooler w/fan, I use the AAZ diesel oil filter (holds 1qt). All my lines are hydraulic with JIC fittings. I do not run a stock cooler! I use 10w/40 full synthetic oil. Freeway driving is 4,000rpm @ 76-77mph. '66 Bus with GRBs 1835 forged bottom end, No issues in 10k mi. Oil temp is usually 210-220 if over 90° outside

[@Mikefngarage]

Great tip!

[@vayabroder729]

I’ve read the Setrab oil cooler is the one to get.

[@jamescandelaria4840]

yes, I use one on my Ghia and Bus, each with a 1915cc but always use AN8 fittings.

[@steveyoda]

I think the explanation is a little incorrect in the video regarding the oil control valve. When the oil temperature is cold its viscosity is higher (original monograde anyway), so when the engine is started, the oil pressure will be high. VW added this control valve to prevent the chance of blowing up the rather flimsy oil cooler when the oil is cold. In this case the valve spring is compressed, the valve is down and the majority of the oil will bypass the cooler and go straight to the bearings. When the oil heats up and becomes 'thinner', the pressure in the system reduces and the oil control valve returns to its closed state, sending all of the oil up through the cooler before oiling the main bearings.

[@Sideloader99]

Hi Mike, thanks for the videos. What size AN fittings AN -6 or AN -8? Thanks

[@Mikefngarage]

an8 is what I am using. I put a link in the description of the ones I use.

[@VolksStokes]

Thanks Mike for sharing good info!

[@kevinhamling1963]

Hey Mike, Very interesting video. Q. What about these extended sumps that seem to be popular. What issues if any do these create. ✌️ Peace from Melbourne Australia.

[@weldybren]

Had one for years. Longer warm-up time, reduced ground clearance. That’s about the only downsides. There are many more upsides.

[@mattstick1man563]

Interesting info Mike !! I had pressure problems on my 1600, I'm wondering if the pump shaft came loose like you said, soon as it gets above freezing I'll check it out. Also I was wondering if you could do a full flow with the engine together or is the only way to do it with it apart ?

[@Mikefngarage]

they make a full flow pump and cover that might work for you.

[@mattstick1man563]

@@Mikefngarage thanks I'll do some research !!

[@vayabroder729]

CB Performance has the Maxi Full Flow In Out system; it’s a full flow without having to drill the case and it comes in 26 and 30 mm.

[@Mikefngarage]

@@vayabroder729 exactly. Hey have you seen how they drill the case in a different place on the side further up on the feed oil rail.....Super sick. I dont know how they do it. the pressure and the return go right inside the case. Look at that short I did of the busses by the bridge raffle giveaway engine. pause it when you see the side where I show it and zoom in.

[@OwhyeeVdub]

I am using 80 line bore main bearings in my new build. I gave it a new 26mm maxi with a non dog house cooling system with a remote oil filter. Ive heard with that line bore its going to have low oil pressure. What do you think?

[@Mikefngarage]

dont really think the line bore will effect the oiling. 80 case is fine. We used to go to 100. but the bearings are not available anymore. that setup is what I would go with.

[@OwhyeeVdub]

@@Mikefngarage thanks!

[@davidrodriguez-rk4ee]

Say on a 1600 dual port, stock everything, what is the ok oil pressure at idle? What is a normal oil pressure when you are in 4th gear, say 2800 rpm?

[@vwkenart]

Hey dumb question but I have low oil pressure with a 30mm pump but I did notice that your oil lines look thinner than mine, mine is 1/2 id I have 2 external oil cooler and type 4 oil cooler and oil thermostat. What you think is my issue?

[@tw8032]

Can you eliminate the bypass spring and plunger if you have a cooler block off plate.

[@krahuma3546]

@@tw8032 thats exactly my question but can't find a proper answer yet. My mechanic says I need to remove the flywheel plunger and spring and put a blocking plunger.I have new engine and oil pressure doesn't go up with rev more than 40 psi and that also idle oil pressure. I have removed the stock oil cooler and used blanching plate. I have external oil cooler with fan after remote oil filter which has a bypass.

[@davidwegner6790]

I build all my engines with 26mm pump but i do use a 30 mm on turbo engines . My thinking is the turbo is one more oil lost

[@Mikefngarage]

absolutely agree with that.....if you have a turbo that sucker uses some oil and needs constant pressure. Risk of over pressurizing is less important than getting oil to that turbo.

[@hded06]

I'm still Available Sundays and Mondays...

[@cringram1003]

I don't know what it does!

[@Mikefngarage]

empi....ha ha.

[@davemurton736]

I run a mild 1776, full flowed, with the Schadek 26 👍