I think its spun a big end

Cam205 · 2020-02-17T22:33:34+00:00

You say it chugged a whole bunch of smoke and now its knocking? How sure are you that it hasnt ingested a whole bunch of oil from the valvetrain or the turbo...

jamesinc

Do you have access to some micrometers? It sounds like you'll want to do all the bearings and probably overbore and also skim the head. If you're going to the effort you should get the block decked too.

If I were in your shoes I'd probably make a call based on the crank journal diameters and roundness. If they're safely within standard spec and can be cleaned up with a basic polish, I'd do all the other work. If the crank was undersized, I'd probably go hunting for another complete B230.

I have a bore dial gauge but I don't have the correct size external micrometer (need a 75-100mm one)

Cam205

Thanks for the comments.

What you mention is the rough plan. Ill send it all off to be measured and go from there. I do have a 940s as mentioned that cost me less that what a rebuild is going to cost even if I do most of the work.

Fingers crossed the crank and bores are ok. Getting some photos now. Watch this space.

jamesinc

The bores might be usable but you equally could just go straight to overboring and put FT pistons in while you're at it and drop the CR for more boost.

It's about $400 for a full set with rings and new gudgeon pins: https://www.ipdusa.com/products/8608/103073-volvo-piston-024-oversize-b230ft-mahle-0376702-271328

Major Ledfoot

jamesinc
The bores might be usable but you equally could just go straight to overboring and put FT pistons in while you're at it and drop the CR for more boost.
It's about $400 for a full set with rings and new gudgeon pins: https://www.ipdusa.com/products/8608/103073-volvo-piston-024-oversize-b230ft-mahle-0376702-271328

You can save a few dollars at FCP.

https://www.fcpeuro.com/Volvo-parts/940/?year=1993&m=208&e=914&t=5&b=6&d=42&v=11

Vee_Que

jamesinc
The bores might be usable but you equally could just go straight to overboring and put FT pistons in while you're at it and drop the CR for more boost.
It's about $400 for a full set with rings and new gudgeon pins: https://www.ipdusa.com/products/8608/103073-volvo-piston-024-oversize-b230ft-mahle-0376702-271328

Slowbrick
https://ozvolvo.org/discussion/comment/171709#Comment_171709
Yes you are right, it doesnt make sense that it could enter the combustion chamber from the other side of the gasket, when I think about it properly its more likely to enter the coolant system and get stuck somewhere if its large enough.
Regarding the photos of your cam, that looks like the hardening has started to wear away. This happens when the oil doesnt have enough zinc or the oil is not changed often enough. Judging by the very dark orange colour of the inside of your head im going to go with the second reason.
You can just pull the sump and remove each connecting rod to check for bearing damage. What you are looking for is for the bearing to have all of the white coating removed and copper colouring showing which may also appear blue in colour because of the heat. Should you find this damage but the crank doesnt have the same damage then you should be right to install new std bearings and go. The right thing of course is to pull the entire motor and measure everything but redblocks are very forgiving in terms of tolerances so a quick eyeball and measure with very nears and a micrometer should get you very close if you do decide to measure.
Given long enough your cam will eventually wear away to look like this. This is a KG2T i bought from @Forg about 11 years ago for a case of beer. It started with that same kind of little wear mark from something funky going on with his head not being straight. Its been in 2 engines and has done about 200000km. It finally gave up the ghost two weeks ago when I heard it ticking away one morning when I started the car. Pulled the valve cover and sure enough its done.
https://cdn.ozvolvo.org/uploads/897/SVIUKV15DA15.png

Fwiw, that's repairable.

The myth that because the ring lands are closer on the na pistons makes them weaker is just that. Every other maker in the 90s went to a higher ringland plus the many cases of NA pistons surviving 500hp in redblocks tells me that it's only the compression and poor tuning that goes with it that is the real issue.

That motor is carnage, maybe it was ran with the oil light on the dash for an extended period? That would cause the rod to bend.

Cam205

I thought about that and it would be nice to have a fresh engine. But I want to keep it to the bare minimum. Im happy to stick with a bit more compression than less at this stage. Im never going to run more than 15psi on a 16t and that wont be regularly when I would. If it was my car thats another story. Im in the process of turbocharging a Peugeot 205 so thats where I can have a bit more fun.

Cam205

{"embed-external":{"data":{"url":"https:\/\/cdn.ozvolvo.org\/uploads\/101\/XA3JPNL1NKBJ.jpeg","name":"03813EB8-F0BC-40FD-8BE8-4DC83F8AF229.jpeg","type":"image\/jpeg","size":224374,"width":1620,"height":1080,"mediaID":9096,"dateInserted":"2020-02-26T06:21:58+00:00","insertUserID":2120,"foreignType":"embed","foreignID":2120,"embedType":"file","format":null,"bodyRaw":null},"loaderData":{"type":"file","file":[],"progressEventEmitter":{"listeners":[null]}}}}

{"embed-external":{"data":{"url":"https:\/\/cdn.ozvolvo.org\/uploads\/938\/KR694MQPQQX0.jpeg","name":"A9FA6C09-B7C3-4DA4-93BC-A3AE3966B9E2.jpeg","type":"image\/jpeg","size":210534,"width":1620,"height":1080,"mediaID":9097,"dateInserted":"2020-02-26T06:22:06+00:00","insertUserID":2120,"foreignType":"embed","foreignID":2120,"embedType":"file","format":null,"bodyRaw":null},"loaderData":{"type":"file","file":[],"progressEventEmitter":{"listeners":[null]}}}}

{"embed-external":{"data":{"url":"https:\/\/cdn.ozvolvo.org\/uploads\/047\/DAW94TMLVVMS.jpeg","name":"704758EC-F3D3-445B-9960-73AE0AE34F04.jpeg","type":"image\/jpeg","size":291617,"width":1620,"height":1080,"mediaID":9098,"dateInserted":"2020-02-26T06:22:14+00:00","insertUserID":2120,"foreignType":"embed","foreignID":2120,"embedType":"file","format":null,"bodyRaw":null},"loaderData":{"type":"file","file":[],"progressEventEmitter":{"listeners":[null]}}}}

{"embed-external":{"data":{"url":"https:\/\/cdn.ozvolvo.org\/uploads\/004\/CCQ3SV88MXCK.jpeg","name":"224CA756-E7B6-4592-8D4F-476A981A67F7.jpeg","type":"image\/jpeg","size":235329,"width":1620,"height":1080,"mediaID":9099,"dateInserted":"2020-02-26T06:22:22+00:00","insertUserID":2120,"foreignType":"embed","foreignID":2120,"embedType":"file","format":null,"bodyRaw":null},"loaderData":{"type":"file","file":[],"progressEventEmitter":{"listeners":[null]}}}}

{"embed-external":{"data":{"url":"https:\/\/cdn.ozvolvo.org\/uploads\/977\/335RVRQ1R73Q.jpeg","name":"241BA4DC-2C21-4E8F-9207-A4465B69770E.jpeg","type":"image\/jpeg","size":254883,"width":1620,"height":1080,"mediaID":9100,"dateInserted":"2020-02-26T06:22:29+00:00","insertUserID":2120,"foreignType":"embed","foreignID":2120,"embedType":"file","format":null,"bodyRaw":null},"loaderData":{"type":"file","file":[],"progressEventEmitter":{"listeners":[null]}}}}

Cam205

Looks to me that its life was not grand...

It could be worse but it looks to have been like this for some time. At this point with all the oil galleries clogged it it just didn't have oil pressure. Seems likely its better to just find a good engine and slot it in.

The light on the pistons makes it look worse than it is. The colour of the staining is not a great sign.

Will be interesting to see what the bores look like. I didn't have time today ti flip the motor upside down again. I didnt have help to flip it over. Got to find the engine stand!

Spac

Cam205
Looks to me that its life was not grand...
It could be worse but it looks to have been like this for some time. At this point with all the oil galleries clogged it it just didn't have oil pressure. Seems likely its better to just find a good engine and slot it in.
The light on the pistons makes it look worse than it is. The colour of the staining is not a great sign.
Will be interesting to see what the bores look like. I didn't have time today ti flip the motor upside down again. I didnt have help to flip it over. Got to find the engine stand!

*Waves*

Philia_Bear

Were the oil pump pipe orings in place when you pulled out the oil pump?

Cam205

Ive no idea. Ill have a look. I believe there was some sort of oring/grommet thing from memory. More flat than round?

jamesinc

Cam205
Ive no idea. Ill have a look. I believe there was some sort of oring/grommet thing from memory. More flat than round?

Yeah they have a rectangular cross-section

Cam205

Also, looks like a rod or 2 may be bent with the bearings looking like they do come to think of it.

cam

Cam205

Touche!

Ive got this 940s lined up here in Syd and as I said its actually grown on me and I would feel bad for stripping it.

I need a week or so to think about it all. I cant really do much until April im afraid as the next round of income is due then if you know what I mean.

Thank for the wave. Its all being processed.

Cam

« Previous Page