Parry_10 Posted September 19, 2012 Share Posted September 19, 2012 Im going to have all my parts next week to put my engine together. At the minute its a 60k miles stock bottom end nothing on it apart from the lower cambelt pulley. So should I change the front crank seal whilst its really easy to get to as everything is off or should I leave it as it is. Im not going to be changing the oil pump. I just dont want to change it and cause a problem as it isnt leaking... Quote Link to comment Share on other sites More sharing options...
welshbuddy Posted September 19, 2012 Share Posted September 19, 2012 to be honest if your not replacing the oil pump ( which i would consider!) then no points changing the crank seal But i would do both Quote Link to comment Share on other sites More sharing options...
johnny g Posted September 19, 2012 Share Posted September 19, 2012 I'd do both as well. When I went from BPU to Big Twins, on the mapping run, my car spewed oil out the FMS. That had never, ever been a problem before. For sake of a few quid, do it and be reassured. Quote Link to comment Share on other sites More sharing options...
listy Posted September 19, 2012 Share Posted September 19, 2012 I agree. May as well do it while its easy to get to mate. Having done mine not long ago, I can confirm it is a royal PITA to do. Its an engine out job really. It can be done with the engine in, like I did, but wish I had just pulled the engine in the end. The cost of a new pump and seal far outways the hassle of having to pull the engine to do it later. Quote Link to comment Share on other sites More sharing options...
Westy Posted September 19, 2012 Share Posted September 19, 2012 As above...do both! Quote Link to comment Share on other sites More sharing options...
Parry_10 Posted September 19, 2012 Author Share Posted September 19, 2012 Its rickys old engine he ran 670hp on it for around 2k miles no issues, plus the engine had good oil pressure and compression across all cylinders. Im not changing a perfectly good oil pump also the engine has only done 60k ish miles Quote Link to comment Share on other sites More sharing options...
listy Posted September 19, 2012 Share Posted September 19, 2012 Mine went at circa 80k miles. I had good pressure and one day on a hard pull it just went. No precursor or anything. One minute good, next minute, all the oil was on the M42!!!! Quote Link to comment Share on other sites More sharing options...
Parry_10 Posted September 19, 2012 Author Share Posted September 19, 2012 ahhh fine new oil pump it is then. Its not about the extra cost I just hate replacing perfectly good parts when theres no need, as all the old one will be good for is the bin then. Quote Link to comment Share on other sites More sharing options...
Parry_10 Posted September 19, 2012 Author Share Posted September 19, 2012 And if the bottom end goes because of the power then thats more money wasted as that will scrap a brand new oil pump as well hmm Quote Link to comment Share on other sites More sharing options...
listy Posted September 19, 2012 Share Posted September 19, 2012 To be fair, I'm not 100% mine was dead. It was the crank seal that went, but was advised that one of the main reasons for crank seal failure is oil pump failure, as the pressure builds, and the crank seal is the easiest way out. I changed mine just to be on the safe side. Plus, at least you will know when it was done and have peace of mind. I make note of all the work I do on the car, so if I ever sell it, I can provide paperwork with dates of when what was fitted Quote Link to comment Share on other sites More sharing options...
HadeS Posted September 19, 2012 Share Posted September 19, 2012 You can always open it and look for any damages (rings which can let oil go around) If the surface is nice and smooth it should be all good. Quote Link to comment Share on other sites More sharing options...
michel lane Posted September 19, 2012 Share Posted September 19, 2012 Don't push the seals in to much and cover the breather holes, else it will leak again . Do a search on this. Quote Link to comment Share on other sites More sharing options...
Rob_Mitchell Posted September 19, 2012 Share Posted September 19, 2012 Yeah i would do both too, just makes it less a worry in your head. Did you buy a toyota full gasket kit? if so then you get one in there. Quote Link to comment Share on other sites More sharing options...
Parry_10 Posted September 19, 2012 Author Share Posted September 19, 2012 Ill have a think to me its pointless changing a perfectly good oil pump I dont expect the bottom end to last a long time anyway so I will probably just change the seal. Ill most likely build a forged bottom end late next year so I dont fancy buying 2 new oil pumps in 12 months. I wont lose any sleep over it its not like the bottom end is forged and worth £££ anyway. Didnt buy a full gasket kit as didnt need to sourced gaskets individually for cheaper. Quote Link to comment Share on other sites More sharing options...
Rob_Mitchell Posted September 19, 2012 Share Posted September 19, 2012 Main thing is you have good compression readings on that block, so thats always really nice to know, plus Rickys car did run big power on it too. So its hit or miss but if your looking at building a block up later then its prob best just taking the chance. off topic but Did you buy the stage 2 head off paul direct? they look awesome. Quote Link to comment Share on other sites More sharing options...
welshbuddy Posted September 19, 2012 Share Posted September 19, 2012 Don't push the seals in to much and cover the breather holes, else it will leak again . Do a search on this. as michael said.... it has just happened to mine.. Even that slight 1mm is vital dude! Quote Link to comment Share on other sites More sharing options...
Parry_10 Posted September 19, 2012 Author Share Posted September 19, 2012 Main thing is you have good compression readings on that block, so thats always really nice to know, plus Rickys car did run big power on it too. So its hit or miss but if your looking at building a block up later then its prob best just taking the chance. off topic but Did you buy the stage 2 head off paul direct? they look awesome. Thats what im thinking mate and ricky only did around 2k miles on that block when he went single. Lee tested the compression before his car was broken perfect across all cylinders I also have the 6 speed from his car as well so thats good to know its perfect and low mileage. No mate thats coming of mikes whifbitz built engine thats only done 5k miles, its also has ti springs and retainers so I can increase the rev limit if I want. Quote Link to comment Share on other sites More sharing options...
Dnk Posted September 19, 2012 Share Posted September 19, 2012 Mines got 135k on the original pump and seal and doesn't leak Quote Link to comment Share on other sites More sharing options...
Parry_10 Posted September 19, 2012 Author Share Posted September 19, 2012 I know how to fit the front seal, all I was really asking was should I bother changing the front seal even though this one hasnt been leaking and I wont be changing the oil pump. I only want the bottom end to last me 5k miles really maybe 10k tops Quote Link to comment Share on other sites More sharing options...
Dnk Posted September 19, 2012 Share Posted September 19, 2012 If it ain't broke don't fix it Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted September 19, 2012 Share Posted September 19, 2012 I think there are a few misconceptions regarding seal and oil pump going on here, but to illustrate what happens with FMS and oil pumps, my FMS failed twice (no it wasn't pushed in too far) the reason was down to the oil pump being worn, not failure, on examination it was mildly scored, my oil pressure was perfect, it seems these pumps can provide perfectly acceptable pressure even in a well worn state, its the leakage past the pump rotors that pressurizes the FMS because the oil drain hole is inadequate as std, and is even ineffective when opened, up once the pump wear pases a certain point, And yet there is no noticeable drop in oil pressure, so you see its always best to go belt and braces when it comes to the pump and FMS, it only takes a few seconds at high RPM to empty the oil pan and by that time its far too late, so don't dismiss replacing the pump with the seal just because it ONLY done 60K, mine did this at 50K:eyebrows: Quote Link to comment Share on other sites More sharing options...
Parry_10 Posted September 19, 2012 Author Share Posted September 19, 2012 If it ain't broke don't fix it Thats what im thinking, maybe changing the seal could potentially cause a problem whereas its fine at the minute. Ill definatley be taking off the lower cambelt pulley and putting a couple of welds on the back as some have failed and come away from the plate before. Quote Link to comment Share on other sites More sharing options...
Parry_10 Posted September 19, 2012 Author Share Posted September 19, 2012 Well im sorry to say this thread has been a bit pointless as ive just found out from Lee the front seal is pretty new anyway:D Quote Link to comment Share on other sites More sharing options...
listy Posted September 19, 2012 Share Posted September 19, 2012 Lol Quote Link to comment Share on other sites More sharing options...
Dnk Posted September 19, 2012 Share Posted September 19, 2012 Well im sorry to say this thread has been a bit pointless as ive just found out from Lee the front seal is pretty new anyway:D Stone him Quote Link to comment Share on other sites More sharing options...
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