Questions about rebuilding D15B1
10-25-2015, 11:23 AM
#1
Questions about rebuilding D15B1
Hi all,
I am planning rebuilding my D15B1 engine next year for reliability. I want collect some info and also confirm what i have in mind about the steps.
1. Is Ebay rebuild kit,which cost about $300, any good? Or maybe I should buy parts seperately?
2. Oversized pistons. So basically I should measure the exisiting bore size and out-of-round to see if I need oversized pistons. Then send block with pistons to machine shop. This part is understandable.
3. Oversized bearings. This part is a bit confusing to me. So I should measure main journal diameter and connector rod journal diamter and also their out-of-round, and then compare to specs in shop manual. Then I should be able to determine if I should grind the journals one size smaller. Then I order the right size bearings. Then i do plastigage check....
So, for example, the diameter on shop manual is 44.976mm - 45mm, I measured 44.85. Then I have to order +0.25mm bearings and ask machine to grind crankshaft down to 44.75. Is it correct? Or I just give machine shop the bearings and old crankshaft, and they know what to do ?
How much would the grinding process cost? I see people selling new/reman standard size crankshaft for around 180 bucks. I can just get one and drop in standard size bearings and be done with it.
4. Connecting rod. I assume the connector rods don't get replaced that often during a normal rebuild. Does it have bushings in the small end? I guess if they are shot, maybe the only option is to replace them. About $150 for 4 stock type rods, which is not that bad.
Any other tips and informations?
I am planning rebuilding my D15B1 engine next year for reliability. I want collect some info and also confirm what i have in mind about the steps.
1. Is Ebay rebuild kit,which cost about $300, any good? Or maybe I should buy parts seperately?
2. Oversized pistons. So basically I should measure the exisiting bore size and out-of-round to see if I need oversized pistons. Then send block with pistons to machine shop. This part is understandable.
3. Oversized bearings. This part is a bit confusing to me. So I should measure main journal diameter and connector rod journal diamter and also their out-of-round, and then compare to specs in shop manual. Then I should be able to determine if I should grind the journals one size smaller. Then I order the right size bearings. Then i do plastigage check....
So, for example, the diameter on shop manual is 44.976mm - 45mm, I measured 44.85. Then I have to order +0.25mm bearings and ask machine to grind crankshaft down to 44.75. Is it correct? Or I just give machine shop the bearings and old crankshaft, and they know what to do ?
How much would the grinding process cost? I see people selling new/reman standard size crankshaft for around 180 bucks. I can just get one and drop in standard size bearings and be done with it.
4. Connecting rod. I assume the connector rods don't get replaced that often during a normal rebuild. Does it have bushings in the small end? I guess if they are shot, maybe the only option is to replace them. About $150 for 4 stock type rods, which is not that bad.
Any other tips and informations?
10-28-2015, 10:27 AM
#2
Re: Questions about rebuilding D15B1
I'm sure you'll find that sourcing a lower-mileage take-off or an already-rebuilt longblock will be a more economical choice than doing it yourself.
10-28-2015, 06:50 PM
#3
Re: Questions about rebuilding D15B1
When it comes to measuring i leave all that to the machine shop, they are the experts and have the proper tools and experience.
Usually I just buy the parts I KNOW I want, for example when I had my short block built i dropped the crank, block, arp rod bolts, pistons and rings off at the shop. i let them measure and source bearings, make all the measures and assembly. I had gone ahead with OS pistons since the block had 270k miles on it when it went in.
brought home the short block, put my new oem oil and water pumps on along with oem gaskets and a rebuilt head.
Usually I just buy the parts I KNOW I want, for example when I had my short block built i dropped the crank, block, arp rod bolts, pistons and rings off at the shop. i let them measure and source bearings, make all the measures and assembly. I had gone ahead with OS pistons since the block had 270k miles on it when it went in.
brought home the short block, put my new oem oil and water pumps on along with oem gaskets and a rebuilt head.
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