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"400" repair


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The "400" had some things to do after months of staying in the oldtimer storage. Looked as the AFM had some problems but before solving that problem I wanted to be sure the electronical ignition is ok

Porting the head, did not grind a lot away. Just making the curves smooth, also on the seems of the casting: Project images are available to Club Members Only, Click to become an OMOC Member.

After two months there is some news to tell. The set of pistons was not complete cause they lend one out to copy them. And thanks to covid we are not allowed to cross the German border but this week I

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@Pounsett: And she came back from working out, so she was warmed up😁...

Sometimes I put parts in the kitchen oven before welding or she finds something in the freezer before I want to fit a bearing etc.   She is used to those situations, think thats why we don't have a dishwasher. I would clean my carb's in that!

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On 06/03/2021 at 23:09, H-400 said:

@Pounsett: And she came back from working out, so she was warmed up😁...

Sometimes I put parts in the kitchen oven before welding or she finds something in the freezer before I want to fit a bearing etc.   She is used to those situations, think thats why we don't have a dishwasher. I would clean my carb's in that!

You should buy your own dishwasher for your carbs, and maybe you will catch the wife cleaning some dishes in it sometime? Lol

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Just an update, nothing important happened. Had some mails from GLS so I could track the parts I ordered. One parcel came from Germany so this will be the one from Risse Motorsport. The expensive one... So suddenly I had a email the parcel was delivered and I was surprised, nobody rang my doorbell and I was at home. Maybe the neighbours took the parcel inside, happens more with those delivery guys. Checked my neighbours but no parcel. This can't be possible, maybe they dropped the parcel on my doorstep en it is stolen??? Didn't sleep that night, in the morning I took the phone to call Risse Motorsport because that parcel was insured. They were very helpfull but they said it is impossible their parcel is stolen, they use always UPS and thursday it was still at their shop.   Lets say that was more than a relief!  Later that day I had an email from Ebay, my parcell was delivered! Ordered only one thing at Ebay and that's those exhaust gaskets... Later more😖.

About the "400": The whole engine is open, took my time to weigh the conrods etc... Look at the conrods, never saw this on a normal CIH, numbered :

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Wanted to balance the conrods but looks like these engines had some special attention, all the conrods had the same weight, on the gramm:

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Did this also with the big end and some were 2 gramm off, but I will not grind it away cause the total weight will be not the same:

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Work on the bottom engine is done, waiting for the parts of Risse:

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The head needs some porting, not that much just making everything smoothly. Checked some works info and the difference between the road version and grp B is only one millimeter in diameter of inletchannals.  

Have a nice Sunday evening.

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  • 2 weeks later...

Can you do me a favour please Herman, and point me in the direction for the 400 head gasket ? Looked on Risse but I am been a bit dumb as keep getting no parts 🤔🙈

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Porting the head, did not grind a lot away. Just making the curves smooth, also on the seems of the casting:

Project images are available to Club Members Only, Click to become an OMOC Member.

Grinded more alu on the outside, used a gasket as template.

Polishing the combustion chambers, so they keep longer clean:

Project images are available to Club Members Only, Click to become an OMOC Member.

My fingers hurt, but it is worth it

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1 minute ago, H-400 said:

 

Porting the head, did not grind a lot away. Just making the curves smooth, also on the seems of the casting:

Project images are available to Club Members Only, Click to become an OMOC Member.

Grinded more alu on the outside, used a gasket as template.

Polishing the combustion chambers, so they keep longer clean:

Project images are available to Club Members Only, Click to become an OMOC Member.

My fingers hurt, but it is worth it

Looking great! 👍

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Some time ago I posted some news, had some days a low profile on this forum.  All the valves are lapped and fitted. Also the stemseals. Because the original stemseals are not available anymore I fitted a size that are almost identical:

As usually I use a plastic foil to protect the stemseal from the sharp edges of the grooves:

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To push the seals at their place I used a tube without sharp edges that fits on the metal part of the seal:

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Checked with a mirror if the stemseal is fitted as wanted and yes it looks OK:

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Before fitting the valve spring with the tool I wanted to know how deep I could press the tool, so I layed an upper valve retainer on the stemseal:

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Using the tool:

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All the valves fitted in the head:

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To be sure what head gasket to fit I measured the combustion chambers, and luckily they are all the same ,some more or less some drops: 52,50CC:

Project images are available to Club Members Only, Click to become an OMOC Member.

After close inspection of the bearings of the crankshaft I noticed one half bearing with an imperfection so I'm going to fit new bearings. My local parts-shop delivered last year those bearings but yet not anymore. Looked at the internet and found a set on a well known website: The Opel Project! 

Andy known as "611" on this forum sold me the set of bearings, so thanks Andy 👍

After some calculating I ordered today the head gasket (reinforced) at Risse, again waiting.

Stay safe, Herman

 

 

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Valve clearance is adjusted. Not the most popular job but needs to be done. I was afraid cause of the valve lapping the adjustment could be changed and it did. Before I stripped the cams etc. I measured the clearance and fitted everyting in plastic numbered cups. After refitting everything two valves were too tight, they must have 0,15-0,20mm clearance. There were a few with 0,20 so I measured those shims and after a few hours and refitting/measuring this job was done. I don't have a set of shims so I'm happy I didn't had to order new ones @ Risse. Remember I had to do this with those fantastic Jaguar straight six engines that we had in the CVRT's. The tappets and shims looked the same.

Picture of the head with cams:

Project images are available to Club Members Only, Click to become an OMOC Member.

Some will notice I have to remove the cams again before fitting the head on the engine, but this work of patience is done. 

Have all a nice Sunday

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