Cost to freshen up a 502 MPI
#4
artselectricinc.com
Platinum Member
I had a pair of Marine Power 502P's that went well over 1,000 hours before they were opened up. I did replace valve springs at 500 hours.
FYI These engine were used year round and cruised anywhere from 3,600 to 4,000 RPM's, and were serviced regularly. I think they had a lot
more to give, but one engine overheated, and had to come apart, so I went through both engines at that time.
Steve
FYI These engine were used year round and cruised anywhere from 3,600 to 4,000 RPM's, and were serviced regularly. I think they had a lot
more to give, but one engine overheated, and had to come apart, so I went through both engines at that time.
Steve
#5
Like Baja said perhaps a simple compression test to determine what, if anything, needs attention. 625 hours is not past its time as Griff said. Barring any compression test issues I'd address the injectors with cleaning and flow testing/balancing.
#7
Registered
Do the heads. You will be amazed how good the bottom end looks like unless it's been abused.
#8
Registered
Receipts on my PQ for both of them to be rebuilt / freshened up was $22k.
#9
Registered
Platinum Member
well , as mentioned , do a leak down test..
3 years ago, i upgraded my 510 's to 547's, cost was 16-17 k for parts and machine work, i replaced everything from crank to complete valve train everything.
now , this was me assembling motors, spending hours setting ring end gaps, etc,,etc,, also , me installing motors etc...
all depends on how much you want to do, and who is going to do it.
3 years ago, i upgraded my 510 's to 547's, cost was 16-17 k for parts and machine work, i replaced everything from crank to complete valve train everything.
now , this was me assembling motors, spending hours setting ring end gaps, etc,,etc,, also , me installing motors etc...
all depends on how much you want to do, and who is going to do it.
#10
Platinum Member
Platinum Member
iTrader: (1)
On a single complete rebuild I has estimates form $6000 all the way up to $14000 on 502 mpi . All depends what is preformed. To freshen up top end and if you can turn a wrench. $1000-$1500. Again depends on what you have replaced in the heads.
Receipts on my PQ for both of them to be rebuilt / freshened up was $22k.
Receipts on my PQ for both of them to be rebuilt / freshened up was $22k.