Type s engine with scored bore help required.

106pete · Post by **106pete** » Tue Dec 10, 2013 9:50 am

I'm helping my friend sort out the serious oil burning problem that's been growing since the last track day.

Last night we got the head of with intentions of a quick refurb and new piston rings, but now we've seen the state of the bore I'm not sure what to do! 3 of them are fine but nearest the cambelt no.4 I guess is quite scored in the middle front and back. You can feel its rough to touch and probably to much to just sand out and risk it like he wants!!

From what he's said he doesn't really want to spend the money on it but options are IMO

1. Try smoothing it out and risk it
2. Remove the engine and fit over sized pistons. Cost over 1k?
3. Remove engine and replace with a jdm h22 and LSD box? Cost £600?

I don't know what more to suggest tbh and I can't see a oval shape bore working very well!

Post by **NafemanNathan** » Tue Dec 10, 2013 10:22 am

Does @Mudgey still have his Type-S engine? I know he was asking something like £1500, but that was a while ago.

Supercharged 無限MUGEN BB1 Profile · Post by **nucleustylzlude** » Tue Dec 10, 2013 10:32 am

You've pretty much summed up his options really. Not a bad shout Nath, but all pretty costly. It's up to him how badly he wants it fixed to keep?

Not nice to find.

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Tue Dec 10, 2013 10:54 am

There was another type s engine going on here for not very much a while ago? Might have been mudgey's engine, but from the guy that bought it off him?

106pete · Post by **106pete** » Tue Dec 10, 2013 10:55 am

Yeah that engine sold on eBay awhile ago, I told him to think about having it but at the same time it could have been wasted. I wonder how much the yanks want for a sh block!

Tbh I don't want to take the block out, so much work I could do without it lol

mills · Post by **mills** » Tue Dec 10, 2013 11:11 am

I've still got my type S engine buddy

took the head off a while ago and from 1st inspection the pistons etc look good.

Supercharged 無限MUGEN BB1 Profile · Post by **nucleustylzlude** » Tue Dec 10, 2013 11:13 am

I've seen a fair bit of scoring on one or two FRM liners now, including one spare block sitting in my garage.

Is the scoring just at the top - TDC? That's where most occurs. If its further down the liner then you're gonna start burning alot of oil and loosing compression in that cylinder. Did you do a compression test on each? Just maybe trying to think it's not as bad as you think, but appreciate your no newbie to this, the fact your asking for options probably means its bad.

Some newer piston rings would help as the original ones wear over time against the tough FRM. Still just a plaster on the problem though.

Bear in mind that from the factory these cars burn oil, especially VTECing all the time. Regular top ups and oil changes are a must. Also might be worth looking at the PCV system to make sure its working as it should or delete it out?

106pete · Post by **106pete** » Tue Dec 10, 2013 11:32 am

All the main scoring is in the middle of the stroke, don't know if something's got in but I remember his last track session complaining about losing vtec in corners and needed topping up but combe is mostly right handers so that wouldn't affect that piston so much??

The cars always had a oil thrust and abit of smoke so I checked the breather system and fitted a catch tank about a year ago, did a compression test about the same time with good results, although the cars always been down on power 190ish was the last rr result.

Mudgey · Post by **Mudgey** » Tue Dec 10, 2013 11:35 am

Yea, I sold my engine and I think the gentlemans plans changed but never knew if he sold it. I can confirm my old engine never used oil or water and was fantastic, then again I would expect it to be good as it only had just ticked over 70,000m when I pulled it.

106pete · Post by **106pete** » Tue Dec 10, 2013 11:38 am

Yeah last time I saw it was on eBay, the lot sold for about 450?