Hi, ive got a little prob with my rebuild thats going on at the mo, ive had my pinto block rebored to 2.1 and have gone to fit the pistons but the oil control ring is very tight in the bore. The metal parts have plenty of clearance but the sprung centre of the three part ring is so tight in the hole that it wont fit, it actually overlaps its self by about 5mm.
can anyone tell me if this is normal? as i know its a scraper ring but i dont want it to scrape the bores away! lol
any help would be appreciated
cheers Jason....
2006-11-26 00:06:20 · 5 answers · asked by nitro69 1 in Cars & Transportation ➔ Maintenance & Repairs
you need to gap your rings. not a big deal but what you need to do is actually file the gap so the ring fits correctly, this is for the scraper rings or compression rings only, the center spacer ring, if its to tight needs to be trimed. i have built many a racing engine and have always custom fitted piston rings to keep tight tolerances to prevent any loss of compression or premature blow-by. also remember to use a good ring compressor and lots and lots of oil, not assembly lube but lots of oil, engine oil.
2006-11-26 02:02:31 · answer #1 · answered by Christian 7 · 1⤊ 0⤋
Hi Jason
yes it is normal, but you dont overlap the spring, you but it together and it will compress when the oil rings are clamped in place before fitting, charles is correct though you will need a Ring compressor to keep every thing tight, this will make fitting the pistons easy and not damage the rings, be sure to alternate the gaps on the rings around the piston
Good luck
2006-11-26 00:57:19 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Hi Jason. From what I know, that particular ring must be squeezed to get it in--the tool is called a ring compressor (no kididng)!. It is normal, but I am not sure how much larger it must be.
If not reasonably tight, it will not push the excess oil out of the cylinder before the engine fires, and will smoke like mad.
You may want to check with a parts shop to find out if that much is actually normal, though my hunchis it is about right.
My brother is a certified mechanic, I have learned a few things from him.
I do believe ring compressor is the exact name.
--CJ "That Cheeky Lad!"
I might add, that is a good engine from what I know.
2006-11-26 00:17:49 · answer #3 · answered by Charles-CeeJay_UK_ USA/CheekyLad 7 · 0⤊ 0⤋
2.1 Pinto Engine
2016-10-31 07:43:46 · answer #4 · answered by ? 4 · 0⤊ 0⤋
yes, there is a ring gap look up engine spects. u will have to cut the ring to size. Find a motor rebuilder and pick his brain... there are also lots of "how to rebuild your --------" books.
2006-11-26 03:18:10 · answer #5 · answered by Anonymous · 0⤊ 0⤋