greddytanabe

i have my ferio n my first b series but i jus started it up one day and cyl. 3 went out in idle theres no smoke jus has no compression in cyl. 3 and i did a compression test and it had nothin but i pourd a lil bit of oil in it n i.got a comp. of 25 i think i need some advise on what it could be and what should i do i was thinkin it was the piston so i was gnna but buy itr replacements can i get some advise please?

Kohen

The oil temporarily seals the rings. If the readings are higher when you add oil, it means the rings and/or cylinder is worn.

jbpnoman

Rings, or possibly ringlands. It's possible you don't need new pistons.

Pull the rotating assembly. You can do this without removing the motor from the car. Inspect the pistons for damage. If they aren't damaged, replace all of your bearings and rings, and reinstall the rotating assembly. If they are, replace the pistons, bearings, and rings, and reinstall.

McNoobin

had a the same basic problem with a b18c5. pulled the head and pistons and found that the 1st compression ring was broken in a few places. replaced all rings and bearings and it ran fine.

greddytanabe

thank you so much for the advise im gnna take it to a friend who is alot more experienced than me i can swaps n basic bolt on n d series but i love my b series to much to take ANY chances and signd up here thnk you guys ... a friend of mine said since im gnna open it up would b a good idea to throw p73 pistons in it what do you all think of that ? would it b safe with a stock head? would i need to stay in the 92 octane range if i do? cause where i live in hawaii we dnt have super
.... i know sad .. so i go plus n octane boost off n on every other month .. but if i dnt have to send the block to a shop n its jus the rings than i can just change that n the bearings n ill be fine?? im havin dohc-V withdrawls lol

McNoobin

to get a proper seal when doing a piston change you really need to have the cylinders honed or overbored to match the pistons you are wanting to put in do to the cylinders being tapered (happens to every engine with mileage) and each piston not being 100% alike. Last engine i put together the pistons were all 82mm but one was 82.0010 and another was 81.9980 or something like that. It may be just my opinion but if you really want something to last, spend a little more time and money to do it right once instead of going fast and cheap and have to replace the rings every 10k miles.

Other than that, if the compression sits around 10 or 10.5 and your tune is proper, you should be fine with 89+ octane.

greddytanabe

thats reeally good to know ya my friend has the material n tools to hoan n stuff hopefully when i open everything i dnt see scores on the cyl. wall than .. (crossing fingers) .. but i really want to fix my gsr block if not than buy a block to get my car running again it sucks not havin around and it the best on gas too thank you with all yur help .. when i open the motor ill have more info i can share with you guys