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Registered User
Join Date: Sep 2006
Location: Winnipeg, MB, Canada
Posts: 222
Engine Block - what to do?

here's my spare engine block that i finally had a chance to take out of the box today, and sure enough what i was mostly afraid of became a reality - #4 cyl is scoured with one single line . I wanted to rebuild my spare engine, but now i don't know what to do - i really wasn't banking on having it re-bored.

'84 944 - Under construction
'77 924 - Sold
'05 Jeep Liberty
'98 Acura Integra
Old 01-02-2008, 08:47 PM
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GostRidr's Avatar
Join Date: May 2004
Location: Palm Springs area, CA
Posts: 342
Hey Dan,

Sorry I'm no expert on engine rebuilds. What is involved in having it re-bored? Expensive, time consuming? I think the expense probably comes in matching new cylinders to the new bore yes?

Good luck!
1991 944S2 Cab, Crystal Silver Metallic "Platinum Banshee"
1987 944S Alpine White, Ice Shark Lights "Desert Ghost"
2015 Charger Rallye SXT
Old 01-02-2008, 08:58 PM
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Proprietoristicly Refined
John_AZ's Avatar
Join Date: Jul 2001
Location: ~Carefree Highway~
Posts: 5,822
Here is a short post to answer a few Qs. I hope your scratch is only barely fingernail felt.
Cylinder honing - regarding ccypher's post
What is the condition of the block in your car?
Old 01-03-2008, 05:23 AM
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Nobody Special
Join Date: Jul 2003
Location: NorCal
Posts: 522
Then again if the scratch is barely perceptible there are countless people that have just re-ringed it knowing it isn't 100% perfect and drive it for years. It doesn't take much carbon to cause a scratch. I have a spare block with serious #3 scoring from a bad injector. I measured the bore and it is a candidate for resleeving only or possibly the maximum cut on a rebore. By the time you spend $500-$700 on quality Sunnen machine honing you still need oversize pistons that push you another $700-$900 in debt. IMO at that point you might as well go big with Darton's and at least get a performance upgrade in the process.

If this were your only engine and you needed to get back on the road I would say go for it. Being a spare block it might not be worth the effort just to have an extra motor.
86 - 951 - Garrett dbb T3/T4R/Tial/Maxtronic -SOLD
91 - BMW 325 iX AWD, 5-spd Coupe, Lazur Blau Metallic-SOLD
86 - 951-K26/8, daily driver-SOLD
87 - 944S - Another daily driver-SOLD
Old 01-03-2008, 06:11 AM
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