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153 Chevy Custom Header and Intake Manifold's |
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I got the Willys ![]() Member ![]() ![]() Joined: 10 June 2012 Location: Western NY Status: Offline Points: 484 |
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Nice job on the pipes.
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47 CJ2A, 51 Willys PU,his and hers 99 XJ 5 speed 4x4
Willys Jeep,what the victorious US troops drove into Tokyo |
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jeep4752 ![]() Member ![]() ![]() Joined: 20 Jan. 2010 Location: Ont. Canada Status: Offline Points: 237 |
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Flat fenders forever!
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gunner ![]() Member ![]() Joined: 05 Dec. 2005 Location: NW Status: Offline Points: 157 |
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4752:
How would you handle the differences between the 153 and 181? I mean, are they ported differently? Any other difference that would force you to fabricate the intake and exhaust differently? Would the pipes interchange?
Also, do you know of any other differences between the two engines- same motor mount locations, bellhousing pattern, etc that would matter in a swap?
eh...edit: just looked over the thread again and I see there are some differences in the head ports.
Second set of questions still holds- what differences are there in a swap with these engines?
Edited by gunner - 29 Dec. 2012 at 5:39pm |
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jeep4752 ![]() Member ![]() ![]() Joined: 20 Jan. 2010 Location: Ont. Canada Status: Offline Points: 237 |
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From what i've learned about the 181 engines, the biggest difference with them is the head, the 153 manifolds will not cover the ports properly. The 181 is supposedly a better flowing head, different port design etc. I would just make a new intake and header from scratch to fit a 181 head.
By the looks of the outside of the 181, to me anyways, it looks like the mounting is all the same. The bellhousing is still a standard looking Chevy bolt pattern like the 153 had. I haven't had my hands on a 181 yet but it looks like frontal mounting is still the same. I've read online that Mercruiser sells the 181 as an upgrade to the 153 as a direct bolt in, so that says that it should be the same mounting on the front and sides to me.
The more i write about these engines the more i want a 181 now.
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Flat fenders forever!
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gunner ![]() Member ![]() Joined: 05 Dec. 2005 Location: NW Status: Offline Points: 157 |
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That's about what I figured regarding the differences.
And I know what you mean about going shopping; I live 5 minute walk from the Pacific and am thinking of heading down to the boatyard to see what I can learn about these engines. Unfortunately everything here has been used in salt water, but you never know when a good takeout may came along. With your write-up on making the manifolds, I feel confident enough to tackle it (or at least practice.... )
When you welded the manifold and header, did you use sheilding gas for your mig?
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otto ![]() Member ![]() ![]() Joined: 26 Feb. 2012 Location: Orygun Status: Offline Points: 2267 |
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I have both the 153 and 181ci engines, with the 181ci (known in boat circles as a 3.0L or 140hp engine) installed in my 2A. Externally they are the same; bellhousing, motor mount locations, accesory bosses, etc. The 3.0L is of course larger internally with a larger bore and longer stroke. The cylinder head is the largest difference with the 3.0 having 8 ports vs. the 2.5's 5, plus the 3.0 has much larger valves. This is clear from the photo posted earlier in this thread showing my adapter alongside the manifold gaskets. I'm told the 3.0 shares a number of parts with Chevy V8s rather than the 6 cyl it is patterned after, mostly pistons and valves. I'm still researching an HEI distributor for the engine as the marine versions don't have vacuum advance capability, can anyone offer any knowledge here?
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47 CJ2A w/fuel injected boat engine
48 CJ2A 64 Ford Econoline Travelwagon If you can't get there in a Jeep, get a motorcycle! |
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jeep4752 ![]() Member ![]() ![]() Joined: 20 Jan. 2010 Location: Ont. Canada Status: Offline Points: 237 |
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Flat fenders forever!
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jeep4752 ![]() Member ![]() ![]() Joined: 20 Jan. 2010 Location: Ont. Canada Status: Offline Points: 237 |
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For a distributor, an early '80's HEI out of a Citation, Celebrity etc should work i would think. Check out a Hyster forklift, we have one at work with one of these 4cyl engines and it has an HEI in it with vacuum advance. I found on eBay an ad a couple of weeks ago for a reman points type distributor for these engines, it was around $60 i think, i bought one for a spare. I like the points type units because they are so much smaller, the HEI unit looks huge on these engines.
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Flat fenders forever!
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jeep4752 ![]() Member ![]() ![]() Joined: 20 Jan. 2010 Location: Ont. Canada Status: Offline Points: 237 |
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Flat fenders forever!
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jeep4752 ![]() Member ![]() ![]() Joined: 20 Jan. 2010 Location: Ont. Canada Status: Offline Points: 237 |
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My distributor arrived when i was away last Thursday, it is the real deal genuine 153 unit, it looks like it's brand new again! I'm very happy with it, all it needs is a cap and rotor and oh yeah, an engine to put it in! Edited by jeep4752 - 31 Dec. 2012 at 3:07am |
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Flat fenders forever!
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jeep4752 ![]() Member ![]() ![]() Joined: 20 Jan. 2010 Location: Ont. Canada Status: Offline Points: 237 |
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Here are more pics that i have of the 153's that i had in my '47.
![]() ![]() ![]() Installed view from passenger side of the first engine. ![]() This is engine number 2, the low milage block with NOS Jahn's racing pistons installed. Little did i know these would result in 11:1 compression ratio after the head went on, ugh. ![]() I modified this flex fuel emblem to tell the world that this wasn't your usual 4cyl. Edited by jeep4752 - 31 Dec. 2012 at 3:08am |
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Flat fenders forever!
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gunner ![]() Member ![]() Joined: 05 Dec. 2005 Location: NW Status: Offline Points: 157 |
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Keep the pictures coming!
A couple questions: one, on the oil pan; you put this in a 2wd, the original front sump pan wouldn't work? It hit the straight axle? Two, what tranny did you use? Looks like I saw the dipstick for an automatic...
Also, on that DJ5 straight axle, did the springs line up ok with the 2a spring mount points?
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jeep4752 ![]() Member ![]() ![]() Joined: 20 Jan. 2010 Location: Ont. Canada Status: Offline Points: 237 |
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I have a front sump Chevy II oil pan that i aquired with the low mile 153 block but the brothers cut the bottom of the sump off, so to save time i used my mint OMC pan. The Chevy II pan would fit and will if theres a next time. The pics with the automatic were the early pics, i had to replace the 700R4 tranny with a standard because of the rough running 153.
A DJ5 front axle is a direct bolt in to these older Jeeps, just like a CJ5 front axle is. Easiest way to get bigger front brakes!
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Flat fenders forever!
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G4331 ![]() Member ![]() Joined: 05 Feb. 2013 Location: South Carolina Status: Offline Points: 1 |
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Hi. I have a 1996 Sonoma ext. cab that has been a project truck of 6 years. I also have a 3.0 Mercruiser in it, mated to a 700R4 tranny w/ hydraulic OD. I will post pics as soon as possible. I love the pics of your engine, my exhaust is a custom stainless job and my intake is a Clifford. While I am very pleased to have a no computers, low tech ride, I need to know something: Does water have to run thru your intake? I am told that this is a must. Is it and if so, why? What sort of milage did you get with this engine in your Jeep?
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jeep4752 ![]() Member ![]() ![]() Joined: 20 Jan. 2010 Location: Ont. Canada Status: Offline Points: 237 |
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Thank you for the compliments! Water doesn't need to run through the intake. The original 153 car engines in the Chevy II's never had water running through their manifolds. I don't have any actual mpg figures for my old engine but even with the 11:1 compression it did really well with gas mileage imo.
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Flat fenders forever!
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Beeman ![]() Member ![]() Joined: 07 Feb. 2013 Location: Zanesville,Oh Status: Offline Points: 1 |
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Hey Bad cool,I had to solve the same problem for a 181 and here is my solution.Removed water jacket from marine manifold,smoothly pluged top dump,cut off bottom dump from chevy diesel manifold,coped it out and welded w/cast 55 rods.2.5"out.Worked good,now in chevy SB C10
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big daddy doug ![]() Member ![]() Joined: 02 Sep. 2013 Location: Warsaw,indiana Status: Offline Points: 1 |
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is there any chance that you would make one for some one if they pay you for it
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bigblock352 ![]() Member ![]() Joined: 17 Sep. 2013 Location: Port Orange fl Status: Offline Points: 5 |
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I've got one of these engines in my Nova. Good bit of work done. 40 over flat top pistons custom ground cam. I like your intake. You can buy the intake and header from Clifford performance but they aren't cheap. It allows for a 4 barrel to be ran though..... Not that you would want to. I'm running a holly 350 and it runs very well with that.
Good looking build. Happy to see someone else giving the 153 some love.
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